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Date: Wed, 25 Mar 2015 00:08:45 +0800
From: "lizho.jin@gmail.com" <lizho.jin@gmail.com>
To: "Nobo Akiya" <nobo.akiya.dev@gmail.com>, 
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Subject: Re: [mpls] Review of draft-ietf-mpls-lsp-ping-relay-reply-07
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------=_001_NextPart106045240676_=----
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Content-Transfer-Encoding: quoted-printable

<html><head><meta http-equiv=3D"content-type" content=3D"text/html; charse=
t=3DUTF-8"><style>body { line-height: 1.5; }blockquote { margin-top: 0px; =
margin-bottom: 0px; margin-left: 0.5em; }p { margin-top: 0px; margin-botto=
m: 0px; }div.foxdiv20150324234305143983 { }body { font-size: 10.5pt; font-=
family: 'Times New Roman'; color: rgb(0, 0, 0); line-height: 1.5; }</style=
></head><body>=0A<!--[if gte mso 9]><xml>=0A<o:shapedefaults v:ext=3D"edit=
" spidmax=3D"1026" ></o:shapedefaults>=0A</xml><![endif]--><!--[if gte mso=
 9]><xml>=0A<o:shapelayout v:ext=3D"edit">=0A<o:idmap v:ext=3D"edit" data=
=3D"1" ></o:idmap>=0A</o:shapelayout></xml><![endif]-->=0A<div><span></spa=
n>Hi Nobo,</div><div>See inline below. Thanks again for the review.</div>=
=0A<div><br></div><hr style=3D"width: 210px; height: 1px;" color=3D"#b5c4d=
f" size=3D"1" align=3D"left">=0A<div><span><div style=3D"MARGIN: 10px; FON=
T-FAMILY: verdana; FONT-SIZE: 10pt"><div>Regards</div><div>Lizhong</div></=
div></span></div>=0A<blockquote style=3D"margin-top: 0px; margin-bottom: 0=
px; margin-left: 0.5em;"><div>&nbsp;</div><div style=3D"border:none;border=
-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm"><div style=3D"PADDING-=
RIGHT: 8px; PADDING-LEFT: 8px; FONT-SIZE: 12px;FONT-FAMILY:tahoma;COLOR:#0=
00000; BACKGROUND: #efefef; PADDING-BOTTOM: 8px; PADDING-TOP: 8px"><div><b=
>From:</b>&nbsp;<a href=3D"mailto:nobo.akiya.dev@gmail.com" style=3D"color=
: blue; text-decoration: underline;">Nobo Akiya</a></div><div><b>Date:</b>=
&nbsp;2015-03-24&nbsp;05:35</div><div><b>To:</b>&nbsp;<a href=3D"mailto:li=
zho.jin@gmail.com" style=3D"color: blue; text-decoration: underline;">lizh=
o.jin@gmail.com</a>; <a href=3D"mailto:draft-ietf-mpls-lsp-ping-relay-repl=
y@tools.ietf.org" style=3D"color: blue; text-decoration: underline;">'draf=
t-ietf-mpls-lsp-ping-relay-reply'</a></div><div><b>CC:</b>&nbsp;<a href=3D=
"mailto:mpls@ietf.org" style=3D"color: blue; text-decoration: underline;">=
'mpls'</a>; <a href=3D"mailto:loa@pi.nu" style=3D"color: blue; text-decora=
tion: underline;">'loa'</a></div><div><b>Subject:</b>&nbsp;RE: Review of d=
raft-ietf-mpls-lsp-ping-relay-reply-07</div></div></div><div><div class=3D=
"FoxDiv20150324234305143983"><!--[if gte mso 9]><xml>=0A<o:shapedefaults v=
:ext=3D"edit" spidmax=3D"1026" ></o:shapedefaults>=0A</xml><![endif]--><!-=
-[if gte mso 9]><xml>=0A<o:shapelayout v:ext=3D"edit">=0A<o:idmap v:ext=3D=
"edit" data=3D"1" ></o:idmap>=0A</o:shapelayout></xml><![endif]--><div cla=
ss=3D"WordSection1" style=3D"page: WordSection1;"><p class=3D"MsoNormal" s=
tyle=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New=
 Roman', serif;"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri=
&quot;,sans-serif;color:#1F497D">Hi Lizhong,<o:p></o:p></span></p><p class=
=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-fa=
mily: 'Times New Roman', serif;"><span style=3D"font-size:11.0pt;font-fami=
ly:&quot;Calibri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p><p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12=
pt; font-family: 'Times New Roman', serif;"><span style=3D"font-size:11.0p=
t;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">Few more follo=
w-up comments in-line with [NOBO].<o:p></o:p></span></p><p class=3D"MsoNor=
mal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Tim=
es New Roman', serif;"><span style=3D"font-size:11.0pt;font-family:&quot;C=
alibri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p><div st=
yle=3D"border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm 4.0pt"=
><div><div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0=
pt 0cm 0cm 0cm"><p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; =
font-size: 12pt; font-family: 'Times New Roman', serif;"><b><span lang=3D"=
EN-US" style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-seri=
f">From:</span></b><span lang=3D"EN-US" style=3D"font-size:11.0pt;font-fam=
ily:&quot;Calibri&quot;,sans-serif"> lizho.jin@gmail.com [mailto:lizho.jin=
@gmail.com] <br><b>Sent:</b> March-23-15 10:48 AM<br><b>To:</b> Nobo Akiya=
; draft-ietf-mpls-lsp-ping-relay-reply<br><b>Cc:</b> mpls; loa<br><b>Subje=
ct:</b> Re: Review of draft-ietf-mpls-lsp-ping-relay-reply-07<o:p></o:p></=
span></p></div></div><p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.000=
1pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><o:p>&nbsp;<=
/o:p></p><div><p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; fo=
nt-size: 12pt; font-family: 'Times New Roman', serif;"><span style=3D"font=
-size:10.5pt;color:black">Hi Nobo,<o:p></o:p></span></p></div><div><p clas=
s=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-f=
amily: 'Times New Roman', serif;"><span style=3D"font-size:10.5pt;color:bl=
ack">Thank you for the detail review again. See the reply inline below.<o:=
p></o:p></span></p></div><div><p class=3D"MsoNormal" style=3D"margin: 0cm =
0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><sp=
an style=3D"font-size:10.5pt;color:black"><o:p>&nbsp;</o:p></span></p></di=
v><div><p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-size=
: 12pt; font-family: 'Times New Roman', serif;"><span style=3D"font-size:1=
0.5pt;color:black">to authors,<o:p></o:p></span></p></div><div><p class=3D=
"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-famil=
y: 'Times New Roman', serif;"><span style=3D"font-size:10.5pt;color:black"=
>Please also check, thanks.<o:p></o:p></span></p></div><div><p class=3D"Ms=
oNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: =
'Times New Roman', serif;"><span style=3D"font-size:10.5pt;color:black"><o=
:p>&nbsp;</o:p></span></p></div><div class=3D"MsoNormal" style=3D"margin: =
0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"=
><span style=3D"font-size:10.5pt;color:black"><hr size=3D"1" width=3D"263"=
 style=3D"width:157.5pt" noshade=3D"" align=3D"left"></span></div><div><di=
v style=3D"margin-left:7.5pt;margin-top:7.5pt;margin-right:7.5pt;margin-bo=
ttom:7.5pt"><div><p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt;=
 font-size: 12pt; font-family: 'Times New Roman', serif;"><span style=3D"f=
ont-size:10.0pt;font-family:&quot;Verdana&quot;,sans-serif;color:black">Re=
gards<o:p></o:p></span></p></div><div><p class=3D"MsoNormal" style=3D"marg=
in: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', ser=
if;"><span style=3D"font-size:10.0pt;font-family:&quot;Verdana&quot;,sans-=
serif;color:black">Lizhong<o:p></o:p></span></p></div></div></div><blockqu=
ote style=3D"margin-left: 6pt; margin-top: 0px;"><div><p class=3D"MsoNorma=
l" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times=
 New Roman', serif;"><span style=3D"font-size:10.5pt;color:black">&nbsp;<o=
:p></o:p></span></p></div><div style=3D"border:none;border-top:solid #B5C4=
DF 1.0pt;padding:3.0pt 0cm 0cm 0cm"><div><div><p class=3D"MsoNormal" style=
=3D"background-color: rgb(239, 239, 239); margin: 0cm 0cm 0.0001pt; font-s=
ize: 12pt; font-family: 'Times New Roman', serif; background-position: ini=
tial initial; background-repeat: initial initial;"><b><span style=3D"font-=
size:9.0pt;font-family:&quot;Tahoma&quot;,sans-serif;color:black">From:</s=
pan></b><span style=3D"font-size:9.0pt;font-family:&quot;Tahoma&quot;,sans=
-serif;color:black">&nbsp;<a href=3D"mailto:nobo.akiya.dev@gmail.com" styl=
e=3D"color: blue; text-decoration: underline;">Nobo Akiya</a><o:p></o:p></=
span></p></div><div><p class=3D"MsoNormal" style=3D"background-color: rgb(=
239, 239, 239); margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'T=
imes New Roman', serif; background-position: initial initial; background-r=
epeat: initial initial;"><b><span style=3D"font-size:9.0pt;font-family:&qu=
ot;Tahoma&quot;,sans-serif;color:black">Date:</span></b><span style=3D"fon=
t-size:9.0pt;font-family:&quot;Tahoma&quot;,sans-serif;color:black">&nbsp;=
2015-03-22&nbsp;06:52<o:p></o:p></span></p></div><div><p class=3D"MsoNorma=
l" style=3D"background-color: rgb(239, 239, 239); margin: 0cm 0cm 0.0001pt=
; font-size: 12pt; font-family: 'Times New Roman', serif; background-posit=
ion: initial initial; background-repeat: initial initial;"><b><span style=
=3D"font-size:9.0pt;font-family:&quot;Tahoma&quot;,sans-serif;color:black"=
>To:</span></b><span style=3D"font-size:9.0pt;font-family:&quot;Tahoma&quo=
t;,sans-serif;color:black">&nbsp;<a href=3D"mailto:draft-ietf-mpls-lsp-pin=
g-relay-reply@tools.ietf.org" style=3D"color: blue; text-decoration: under=
line;">draft-ietf-mpls-lsp-ping-relay-reply@tools.ietf.org</a><o:p></o:p><=
/span></p></div><div><p class=3D"MsoNormal" style=3D"background-color: rgb=
(239, 239, 239); margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: '=
Times New Roman', serif; background-position: initial initial; background-=
repeat: initial initial;"><b><span style=3D"font-size:9.0pt;font-family:&q=
uot;Tahoma&quot;,sans-serif;color:black">CC:</span></b><span style=3D"font=
-size:9.0pt;font-family:&quot;Tahoma&quot;,sans-serif;color:black">&nbsp;<=
a href=3D"mailto:mpls@ietf.org" style=3D"color: blue; text-decoration: und=
erline;">mpls@ietf.org</a>; <a href=3D"mailto:loa@pi.nu" style=3D"color: b=
lue; text-decoration: underline;">'Loa Andersson'</a><o:p></o:p></span></p=
></div><div><p class=3D"MsoNormal" style=3D"background-color: rgb(239, 239=
, 239); margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New=
 Roman', serif; background-position: initial initial; background-repeat: i=
nitial initial;"><b><span style=3D"font-size:9.0pt;font-family:&quot;Tahom=
a&quot;,sans-serif;color:black">Subject:</span></b><span style=3D"font-siz=
e:9.0pt;font-family:&quot;Tahoma&quot;,sans-serif;color:black">&nbsp;Revie=
w of draft-ietf-mpls-lsp-ping-relay-reply-07<o:p></o:p></span></p></div></=
div></div><div><div><p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001=
pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span style=
=3D"font-size:10.5pt;color:black">Hi Authors,<o:p></o:p></span></p></div><=
div><p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 1=
2pt; font-family: 'Times New Roman', serif;"><span style=3D"font-size:10.5=
pt;color:black">&nbsp;<o:p></o:p></span></p></div><div><p class=3D"MsoNorm=
al" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Time=
s New Roman', serif;"><span style=3D"font-size:10.5pt;color:black">I was a=
sked to provide a review of the following document:<o:p></o:p></span></p><=
/div><div><p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-s=
ize: 12pt; font-family: 'Times New Roman', serif;"><span style=3D"font-siz=
e:10.5pt;color:black">&nbsp;<o:p></o:p></span></p></div><div><p class=3D"M=
soNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family:=
 'Times New Roman', serif;"><span style=3D"font-size:10.5pt;color:black"><=
a href=3D"http://tools.ietf.org/html/draft-ietf-mpls-lsp-ping-relay-reply-=
07" style=3D"color: blue; text-decoration: underline;">http://tools.ietf.o=
rg/html/draft-ietf-mpls-lsp-ping-relay-reply-07</a> <o:p></o:p></span></p>=
</div><div><p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-=
size: 12pt; font-family: 'Times New Roman', serif;"><span style=3D"font-si=
ze:10.5pt;color:black">&nbsp;<o:p></o:p></span></p></div><div><p class=3D"=
MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family=
: 'Times New Roman', serif;"><span style=3D"font-size:10.5pt;color:black">=
The document is well written and addresses a real problem. I do have a<o:p=
></o:p></span></p></div><div><p class=3D"MsoNormal" style=3D"margin: 0cm 0=
cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><spa=
n style=3D"font-size:10.5pt;color:black">number of (mostly minor and some =
moderate) comments which I'd like to see<o:p></o:p></span></p></div><div><=
p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; =
font-family: 'Times New Roman', serif;"><span style=3D"font-size:10.5pt;co=
lor:black">addressed before progressing the document.<o:p></o:p></span></p=
></div><div><p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font=
-size: 12pt; font-family: 'Times New Roman', serif;"><span style=3D"font-s=
ize:10.5pt;color:black">&nbsp;<o:p></o:p></span></p></div><div><p class=3D=
"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-famil=
y: 'Times New Roman', serif;"><span style=3D"font-size:10.5pt;color:black"=
>Section 2<o:p></o:p></span></p></div><div><p class=3D"MsoNormal" style=3D=
"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman'=
, serif;"><span style=3D"font-size:10.5pt;color:black">--------------<o:p>=
</o:p></span></p></div><div><p class=3D"MsoNormal" style=3D"margin: 0cm 0c=
m 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span=
 style=3D"font-size:10.5pt;color:black">&nbsp;<o:p></o:p></span></p></div>=
<div><p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: =
12pt; font-family: 'Times New Roman', serif;"><span style=3D"font-size:10.=
5pt;color:black">&nbsp;&nbsp; Figure 1 demonstrates a case where one LSP i=
s set up between PE1 and<o:p></o:p></span></p></div><div><p class=3D"MsoNo=
rmal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Ti=
mes New Roman', serif;"><span style=3D"font-size:10.5pt;color:black">&nbsp=
;&nbsp; PE2.&nbsp; If PE1's IP address is not distributed to AS2, a tracer=
oute<o:p></o:p></span></p></div><div><p class=3D"MsoNormal" style=3D"margi=
n: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', seri=
f;"><span style=3D"font-size:10.5pt;color:black">&nbsp;&nbsp; from PE1 dir=
ected to PE2 could fail if the fault exists somewhere<o:p></o:p></span></p=
></div><div><p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font=
-size: 12pt; font-family: 'Times New Roman', serif;"><span style=3D"font-s=
ize:10.5pt;color:black">&nbsp;&nbsp; between ASBR2 and PE2.<o:p></o:p></sp=
an></p></div><div><p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt=
; font-size: 12pt; font-family: 'Times New Roman', serif;"><span style=3D"=
font-size:10.5pt;color:black">&nbsp;<o:p></o:p></span></p></div><div><p cl=
ass=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font=
-family: 'Times New Roman', serif;"><span style=3D"font-size:10.5pt;color:=
black">Above is not entirely accurate. The Traceroute from PE1 to PE2 can =
fail even<o:p></o:p></span></p></div><div><p class=3D"MsoNormal" style=3D"=
margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman',=
 serif;"><span style=3D"font-size:10.5pt;color:black">if there is no fault=
. It would be good to clarify this by saying "If PE1's<o:p></o:p></span></=
p></div><div><p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; fon=
t-size: 12pt; font-family: 'Times New Roman', serif;"><span style=3D"font-=
size:10.5pt;color:black">IP address is not distributed to AS2, a tracerout=
e from PE1 directed towards<o:p></o:p></span></p></div><div><p class=3D"Ms=
oNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: =
'Times New Roman', serif;"><span style=3D"font-size:10.5pt;color:black">PE=
2 can result in a failure because an LSR in AS2 may not be able to send<o:=
p></o:p></span></p></div><div><p class=3D"MsoNormal" style=3D"margin: 0cm =
0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><sp=
an style=3D"font-size:10.5pt;color:black">the Echo Reply message".<o:p></o=
:p></span></p></div><div><p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0=
.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span st=
yle=3D"font-size:10.5pt;color:black">[Lizhong] accepted.<o:p></o:p></span>=
</p></div><div><p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; f=
ont-size: 12pt; font-family: 'Times New Roman', serif;"><span style=3D"fon=
t-size:10.5pt;color:black">&nbsp;<o:p></o:p></span></p></div><div><p class=
=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-fa=
mily: 'Times New Roman', serif;"><span style=3D"font-size:10.5pt;color:bla=
ck">&nbsp;&nbsp; Note that throughout the document, routable address means=
 that it is<o:p></o:p></span></p></div><div><p class=3D"MsoNormal" style=
=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Rom=
an', serif;"><span style=3D"font-size:10.5pt;color:black">&nbsp;&nbsp; pos=
sible to route an IP packet to this address using the normal<o:p></o:p></s=
pan></p></div><div><p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001p=
t; font-size: 12pt; font-family: 'Times New Roman', serif;"><span style=3D=
"font-size:10.5pt;color:black">&nbsp;&nbsp; information exchanged by the I=
GP operating in the AS<o:p></o:p></span></p></div><div><p class=3D"MsoNorm=
al" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Time=
s New Roman', serif;"><span style=3D"font-size:10.5pt;color:black">&nbsp;<=
o:p></o:p></span></p></div><div><p class=3D"MsoNormal" style=3D"margin: 0c=
m 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><=
span style=3D"font-size:10.5pt;color:black">Missing '.' (period) at the en=
d of the paragraph.<o:p></o:p></span></p></div><div><p class=3D"MsoNormal"=
 style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times N=
ew Roman', serif;"><span style=3D"font-size:10.5pt;color:black">[Lizhong] =
accepted.<o:p></o:p></span></p></div><div><p class=3D"MsoNormal" style=3D"=
margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman',=
 serif;"><span style=3D"font-size:10.5pt;color:black">&nbsp;<o:p></o:p></s=
pan></p></div><div><p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001p=
t; font-size: 12pt; font-family: 'Times New Roman', serif;"><span style=3D=
"font-size:10.5pt;color:black">&nbsp;&nbsp; When tracing an LSP from one A=
N to the remote AN,<o:p></o:p></span></p></div><div><p class=3D"MsoNormal"=
 style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times N=
ew Roman', serif;"><span style=3D"font-size:10.5pt;color:black">&nbsp;&nbs=
p; the LSR1/LSR2 node could not make a response to the Echo Request<o:p></=
o:p></span></p></div><div><p class=3D"MsoNormal" style=3D"margin: 0cm 0cm =
0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span s=
tyle=3D"font-size:10.5pt;color:black">&nbsp;&nbsp; either, like the P2 nod=
e in the inter-AS scenario in Figure 1.<o:p></o:p></span></p></div><div><p=
 class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; f=
ont-family: 'Times New Roman', serif;"><span style=3D"font-size:10.5pt;col=
or:black">&nbsp;<o:p></o:p></span></p></div><div><p class=3D"MsoNormal" st=
yle=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New =
Roman', serif;"><span style=3D"font-size:10.5pt;color:black">"... could no=
t make a response to the Echo Request either ..." can perhaps<o:p></o:p></=
span></p></div><div><p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001=
pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span style=
=3D"font-size:10.5pt;color:black">be rephrased as "... cannot send the Ech=
o Reply either ...", to be a bit<o:p></o:p></span></p></div><div><p class=
=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-fa=
mily: 'Times New Roman', serif;"><span style=3D"font-size:10.5pt;color:bla=
ck">more clear. Yeah it's really a nitpick, but _making_ the response pack=
et and<o:p></o:p></span></p></div><div><p class=3D"MsoNormal" style=3D"mar=
gin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', se=
rif;"><span style=3D"font-size:10.5pt;color:black">_sending_ the response =
packet are two different operations in a code.<o:p></o:p></span></p></div>=
<div><p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: =
12pt; font-family: 'Times New Roman', serif;"><span style=3D"font-size:10.=
5pt;color:black">[Lizhong] accepted.<o:p></o:p></span></p></div><div><p cl=
ass=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font=
-family: 'Times New Roman', serif;"><span style=3D"font-size:10.5pt;color:=
black">&nbsp;<o:p></o:p></span></p></div><div><p class=3D"MsoNormal" style=
=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Rom=
an', serif;"><span style=3D"font-size:10.5pt;color:black">Figure 3<o:p></o=
:p></span></p></div><div><p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0=
.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span st=
yle=3D"font-size:10.5pt;color:black">--------------<o:p></o:p></span></p><=
/div><div><p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-s=
ize: 12pt; font-family: 'Times New Roman', serif;"><span style=3D"font-siz=
e:10.5pt;color:black">&nbsp;<o:p></o:p></span></p></div><div><p class=3D"M=
soNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family:=
 'Times New Roman', serif;"><span style=3D"font-size:10.5pt;color:black">T=
ypically, the numbers at the top (i.e., bit positions 0, 1, 2, ...) are<o:=
p></o:p></span></p></div><div><p class=3D"MsoNormal" style=3D"margin: 0cm =
0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><sp=
an style=3D"font-size:10.5pt;color:black">aligned with columns with '-' ch=
aracter instead of '+' character. In other<o:p></o:p></span></p></div><div=
><p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt=
; font-family: 'Times New Roman', serif;"><span style=3D"font-size:10.5pt;=
color:black">words, let's shift the bit positions to the right by one spac=
e.<o:p></o:p></span></p></div><div><p class=3D"MsoNormal" style=3D"margin:=
 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;=
"><span style=3D"font-size:10.5pt;color:black">[Lizhong] good catch, thank=
s.<o:p></o:p></span></p></div><div><p class=3D"MsoNormal" style=3D"margin:=
 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;=
"><span style=3D"font-size:10.5pt;color:black">&nbsp;<o:p></o:p></span></p=
></div><div><p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font=
-size: 12pt; font-family: 'Times New Roman', serif;"><span style=3D"font-s=
ize:10.5pt;color:black">Section 3.3<o:p></o:p></span></p></div><div><p cla=
ss=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-=
family: 'Times New Roman', serif;"><span style=3D"font-size:10.5pt;color:b=
lack">--------------<o:p></o:p></span></p></div><div><p class=3D"MsoNormal=
" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times =
New Roman', serif;"><span style=3D"font-size:10.5pt;color:black">&nbsp;<o:=
p></o:p></span></p></div><div><p class=3D"MsoNormal" style=3D"margin: 0cm =
0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><sp=
an style=3D"font-size:10.5pt;color:black">s/the Reply/the Echo Reply/<o:p>=
</o:p></span></p></div><div><p class=3D"MsoNormal" style=3D"margin: 0cm 0c=
m 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span=
 style=3D"font-size:10.5pt;color:black">[Lizhong] accepted.<o:p></o:p></sp=
an></p></div><div><p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt=
; font-size: 12pt; font-family: 'Times New Roman', serif;"><span style=3D"=
font-size:10.5pt;color:black">&nbsp;<o:p></o:p></span></p></div><div><p cl=
ass=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font=
-family: 'Times New Roman', serif;"><span style=3D"font-size:10.5pt;color:=
black">Section 4.1<o:p></o:p></span></p></div><div><p class=3D"MsoNormal" =
style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times Ne=
w Roman', serif;"><span style=3D"font-size:10.5pt;color:black">-----------=
---<o:p></o:p></span></p></div><div><p class=3D"MsoNormal" style=3D"margin=
: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif=
;"><span style=3D"font-size:10.5pt;color:black">&nbsp;<o:p></o:p></span></=
p></div><div><p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; fon=
t-size: 12pt; font-family: 'Times New Roman', serif;"><span style=3D"font-=
size:10.5pt;color:black">&nbsp;&nbsp; When the Echo Request is first sent =
by the initiator included a Relay<o:p></o:p></span></p></div><div><p class=
=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-fa=
mily: 'Times New Roman', serif;"><span style=3D"font-size:10.5pt;color:bla=
ck">&nbsp;&nbsp; Node Address Stack TLV, the TLV MUST contain the initiato=
r address as<o:p></o:p></span></p></div><div><p class=3D"MsoNormal" style=
=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Rom=
an', serif;"><span style=3D"font-size:10.5pt;color:black">&nbsp;&nbsp; the=
 only entry of the stack of relayed addresses,<o:p></o:p></span></p></div>=
<div><p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: =
12pt; font-family: 'Times New Roman', serif;"><span style=3D"font-size:10.=
5pt;color:black">&nbsp;<o:p></o:p></span></p></div><div><p class=3D"MsoNor=
mal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Tim=
es New Roman', serif;"><span style=3D"font-size:10.5pt;color:black">I'd li=
ke to suggest rephrasing the first half of above sentence as follows.<o:p>=
</o:p></span></p></div><div><p class=3D"MsoNormal" style=3D"margin: 0cm 0c=
m 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span=
 style=3D"font-size:10.5pt;color:black">&nbsp;<o:p></o:p></span></p></div>=
<div><p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: =
12pt; font-family: 'Times New Roman', serif;"><span style=3D"font-size:10.=
5pt;color:black">When the initiator sends the first Echo Request for the T=
raceroute<o:p></o:p></span></p></div><div><p class=3D"MsoNormal" style=3D"=
margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman',=
 serif;"><span style=3D"font-size:10.5pt;color:black">operation, with a Re=
lay Node Address Stack TLV, the TLV MUST contain ...<o:p></o:p></span></p>=
</div><div><p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-=
size: 12pt; font-family: 'Times New Roman', serif;"><span style=3D"font-si=
ze:10.5pt;color:black">[Lizhong] I'd like to remove "<span style=3D"backgr=
ound:white">Traceroute" as below. Because in "Ping" mode,</span><o:p></o:p=
></span></p></div><div><p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0=
001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span styl=
e=3D"font-size:10.5pt;color:black;background:white">the Relayed Echo Reply=
 mechanism could still work.</span><span style=3D"font-size:10.5pt;color:b=
lack"><o:p></o:p></span></p></div><div><div><p class=3D"MsoNormal" style=
=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Rom=
an', serif;"><span style=3D"font-size:10.5pt;color:black">When the initiat=
or sends the first Echo Request<span style=3D"background:white">&nbsp;with=
 a Relay Node Address&nbsp;</span><o:p></o:p></span></p></div><div><p clas=
s=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-f=
amily: 'Times New Roman', serif;"><span style=3D"font-size:10.5pt;color:bl=
ack;background:white">Stack TLV, the TLV MUST contain ...</span><span styl=
e=3D"font-size:10.5pt;color:black"><o:p></o:p></span></p></div></div><div>=
<p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt;=
 font-family: 'Times New Roman', serif;"><span style=3D"font-size:10.5pt;c=
olor:black">&nbsp;<o:p></o:p></span></p><p class=3D"MsoNormal" style=3D"ma=
rgin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', s=
erif;"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,san=
s-serif;color:#1F497D">[NOBO] So perhaps what we want to say here is that =
the first address of the Relay Node Address Stack TLV in the MPLS Echo Req=
uest sent must be the same as the source IP address used in the sending pa=
cket. In other words, we should not have any text that restricts that ther=
e must only be one entry in the Relay Node Address Stack TLV. Then we can =
follow that up with texts like, when operating in the Traceroute mode, the=
n the first Echo Request sent will have the Relay Node Address Stack TLV c=
ontaining one local address.<o:p></o:p></span></p><p class=3D"MsoNormal" s=
tyle=3D"margin: 0cm 0cm 0.0001pt;"><font color=3D"#1f497d" face=3D"Calibri=
, sans-serif"><span style=3D"font-size: 15px; line-height: 22px;">[Lizhong=
]: right, not necessary to say "only", but the traceroute related words se=
em to be included already. So rephrase as below.</span></font></p><p class=
=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt;"><span style=3D"backgrou=
nd-color: rgba(0, 0, 0, 0); color: rgb(31, 73, 125); font-family: 'Calibri=
, sans-serif'; font-size: 15px; line-height: 1.5;">When the initiator send=
s the first Echo Request with a Relay Node Address Stack TLV, the TLV MUST=
 contain the initiator address as the first entry of the stack of relayed =
addresses, the destination address pointer set to this entry, and the sour=
ce address of the replying router set to null.</span><font color=3D"#1f497=
d" face=3D"Calibri, sans-serif"><span style=3D"font-size: 15px; line-heigh=
t: 22px;">&nbsp;</span></font></p><p class=3D"MsoNormal" style=3D"margin: =
0cm 0cm 0.0001pt;"><font color=3D"#1f497d" face=3D"Calibri, sans-serif"><s=
pan style=3D"font-size: 15px; line-height: 22px;"><br></span></font></p><!=
--StartFragment--><!--EndFragment--><p class=3D"MsoNormal" style=3D"margin=
: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif=
;"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-se=
rif;color:#1F497D"><o:p>&nbsp;</o:p></span></p><p class=3D"MsoNormal" styl=
e=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Ro=
man', serif;"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&qu=
ot;,sans-serif"><o:p>&nbsp;</o:p></span></p></div><div><p class=3D"MsoNorm=
al" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Time=
s New Roman', serif;"><span style=3D"font-size:10.5pt;color:black">Section=
 4.2<o:p></o:p></span></p></div><div><p class=3D"MsoNormal" style=3D"margi=
n: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', seri=
f;"><span style=3D"font-size:10.5pt;color:black">--------------<o:p></o:p>=
</span></p></div><div><p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.00=
01pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span style=
=3D"font-size:10.5pt;color:black">&nbsp;<o:p></o:p></span></p></div><div><=
p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; =
font-family: 'Times New Roman', serif;"><span style=3D"font-size:10.5pt;co=
lor:black">&nbsp;&nbsp; Those address entries with K bit set to 1 MUST be =
kept in the stack.<o:p></o:p></span></p></div><div><p class=3D"MsoNormal" =
style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times Ne=
w Roman', serif;"><span style=3D"font-size:10.5pt;color:black">&nbsp;&nbsp=
; The receiver MUST check the addresses of the stack in sequence from<o:p>=
</o:p></span></p></div><div><p class=3D"MsoNormal" style=3D"margin: 0cm 0c=
m 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span=
 style=3D"font-size:10.5pt;color:black">&nbsp;&nbsp; bottom to top to find=
 the last address in the stack with the K bit<o:p></o:p></span></p></div><=
div><p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 1=
2pt; font-family: 'Times New Roman', serif;"><span style=3D"font-size:10.5=
pt;color:black">&nbsp;&nbsp; set (or the top of the stack if no K bit was =
found).<o:p></o:p></span></p></div><div><p class=3D"MsoNormal" style=3D"ma=
rgin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', s=
erif;"><span style=3D"font-size:10.5pt;color:black">&nbsp;<o:p></o:p></spa=
n></p></div><div><p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt;=
 font-size: 12pt; font-family: 'Times New Roman', serif;"><span style=3D"f=
ont-size:10.5pt;color:black">Shouldn't above "find the last address in the=
 stack with the K bit set"<o:p></o:p></span></p></div><div><p class=3D"Mso=
Normal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: '=
Times New Roman', serif;"><span style=3D"font-size:10.5pt;color:black">ins=
tead say "find the last non-Null address in the stack with the K bit<o:p><=
/o:p></span></p></div><div><p class=3D"MsoNormal" style=3D"margin: 0cm 0cm=
 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span =
style=3D"font-size:10.5pt;color:black">set"? Otherwise the procedure will =
cause relay LSRs to always refer to this<o:p></o:p></span></p></div><div><=
p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; =
font-family: 'Times New Roman', serif;"><span style=3D"font-size:10.5pt;co=
lor:black">Null address with K bit set, preventing the first initiator add=
ress to be<o:p></o:p></span></p></div><div><p class=3D"MsoNormal" style=3D=
"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman'=
, serif;"><span style=3D"font-size:10.5pt;color:black">ever reached when s=
earching for the next relay address. On a related topic,<o:p></o:p></span>=
</p></div><div><p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; f=
ont-size: 12pt; font-family: 'Times New Roman', serif;"><span style=3D"fon=
t-size:10.5pt;color:black">what is the purpose of allowing a Null address =
entry with K bit set?<o:p></o:p></span></p></div><div><p class=3D"MsoNorma=
l" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times=
 New Roman', serif;"><span style=3D"font-size:10.5pt;color:black">[Lizhong=
]: please refer to the following in section 4.2.<o:p></o:p></span></p></di=
v><div><p class=3D"MsoNormal" style=3D"text-align: justify; margin: 0cm 0c=
m 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span=
 lang=3D"EN-US" style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,=
sans-serif;color:black">&nbsp; &nbsp;If a node spans two addressing domain=
s (with respect to this message)</span><span style=3D"font-size:10.5pt;fon=
t-family:&quot;Calibri&quot;,sans-serif;color:black"><o:p></o:p></span></p=
><p class=3D"MsoNormal" style=3D"text-align: justify; margin: 0cm 0cm 0.00=
01pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang=
=3D"EN-US" style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-=
serif;color:black">&nbsp;&nbsp; where nodes on either side may not be able=
 to nodes in the other</span><span style=3D"font-size:10.5pt;font-family:&=
quot;Calibri&quot;,sans-serif;color:black"><o:p></o:p></span></p><p class=
=3D"MsoNormal" style=3D"text-align: justify; margin: 0cm 0cm 0.0001pt; fon=
t-size: 12pt; font-family: 'Times New Roman', serif;"><span lang=3D"EN-US"=
 style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;colo=
r:black">&nbsp;&nbsp; domain, then the final address added MUST set the K =
bit.&nbsp; K bit</span><span style=3D"font-size:10.5pt;font-family:&quot;C=
alibri&quot;,sans-serif;color:black"><o:p></o:p></span></p><p class=3D"Mso=
Normal" style=3D"text-align: justify; margin: 0cm 0cm 0.0001pt; font-size:=
 12pt; font-family: 'Times New Roman', serif;"><span lang=3D"EN-US" style=
=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:blac=
k">&nbsp;&nbsp; applies in the case of a NULL address, to serve as a warni=
ng to the</span><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&=
quot;,sans-serif;color:black"><o:p></o:p></span></p><p class=3D"MsoNormal"=
 style=3D"text-align: justify; margin: 0cm 0cm 0.0001pt; font-size: 12pt; =
font-family: 'Times New Roman', serif;"><span lang=3D"EN-US" style=3D"font=
-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">&nbsp=
;&nbsp; initiator that further Echo Request messages may not result in</sp=
an><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-se=
rif;color:black"><o:p></o:p></span></p><p class=3D"MsoNormal" style=3D"tex=
t-align: justify; margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: =
'Times New Roman', serif;"><span lang=3D"EN-US" style=3D"font-size:10.5pt;=
font-family:&quot;Calibri&quot;,sans-serif;color:black">&nbsp;&nbsp; recei=
ving Echo Reply messages.</span><span style=3D"font-size:10.5pt;font-famil=
y:&quot;Calibri&quot;,sans-serif;color:black"><o:p></o:p></span></p><p cla=
ss=3D"MsoNormal" style=3D"text-align: justify; margin: 0cm 0cm 0.0001pt; f=
ont-size: 12pt; font-family: 'Times New Roman', serif;"><span lang=3D"EN-U=
S" style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;co=
lor:black">But I believe we need to update section 4.6 as below:</span><sp=
an style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;co=
lor:black"><o:p></o:p></span></p><p class=3D"MsoNormal" style=3D"text-alig=
n: justify; margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times=
 New Roman', serif;"><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-f=
amily:&quot;Calibri&quot;,sans-serif;color:black">OLD:</span><span style=
=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:blac=
k"><o:p></o:p></span></p><p class=3D"MsoNormal" style=3D"text-align: justi=
fy; margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Rom=
an', serif;"><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:black">Each time the TTL is increased, =
the initiator MUST copy the</span><span style=3D"font-size:10.5pt;font-fam=
ily:&quot;Calibri&quot;,sans-serif;color:black"><o:p></o:p></span></p><p c=
lass=3D"MsoNormal" style=3D"text-align: justify; margin: 0cm 0cm 0.0001pt;=
 font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang=3D"EN=
-US" style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;=
color:black">&nbsp;&nbsp; Relay Node Address Stack TLV received in the pre=
vious Echo Reply to</span><span style=3D"font-size:10.5pt;font-family:&quo=
t;Calibri&quot;,sans-serif;color:black"><o:p></o:p></span></p><p class=3D"=
MsoNormal" style=3D"text-align: justify; margin: 0cm 0cm 0.0001pt; font-si=
ze: 12pt; font-family: 'Times New Roman', serif;"><span lang=3D"EN-US" sty=
le=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:bl=
ack">&nbsp;&nbsp; the next Echo Request.</span><span style=3D"font-size:10=
.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"><o:p></o:p></=
span></p><p class=3D"MsoNormal" style=3D"text-align: justify; margin: 0cm =
0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><sp=
an style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;co=
lor:black">NEW:<o:p></o:p></span></p><p class=3D"MsoNormal" style=3D"text-=
align: justify; margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'T=
imes New Roman', serif;"><span lang=3D"EN-US" style=3D"font-size:10.5pt;fo=
nt-family:&quot;Calibri&quot;,sans-serif;color:black">Each time the TTL is=
 increased, the initiator could copy the</span><span style=3D"font-size:10=
.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"><o:p></o:p></=
span></p><p class=3D"MsoNormal" style=3D"text-align: justify; margin: 0cm =
0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><sp=
an lang=3D"EN-US" style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot=
;,sans-serif;color:black">&nbsp;&nbsp; Relay Node Address Stack TLV in the=
 previous Echo Reply to</span><span style=3D"font-size:10.5pt;font-family:=
&quot;Calibri&quot;,sans-serif;color:black"><o:p></o:p></span></p><p class=
=3D"MsoNormal" style=3D"text-align: justify; margin: 0cm 0cm 0.0001pt; fon=
t-size: 12pt; font-family: 'Times New Roman', serif;"><span lang=3D"EN-US"=
 style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;colo=
r:black">&nbsp;&nbsp; the next Echo Request.&nbsp;</span><span style=3D"fo=
nt-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black;back=
ground:white">Some modifications could also be made to the stack TLV, e.g.=
, delete the NIL entry.</span><span style=3D"font-size:10.5pt;font-family:=
&quot;Calibri&quot;,sans-serif;color:black"><o:p></o:p></span></p></div><d=
iv><p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12=
pt; font-family: 'Times New Roman', serif;"><span style=3D"font-size:10.5p=
t;color:black">&nbsp;<o:p></o:p></span></p><p class=3D"MsoNormal" style=3D=
"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman'=
, serif;"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,=
sans-serif;color:#1F497D">[NOBO] That=E2=80=99s a reasonable approach to a=
ddress this, as long as the document states that the initiator MUST delete=
 the NIL entry in subsequent Echo Requests. Otherwise, you will have a cas=
e where last entry with K bit set in the TLV is NIL, and described procedu=
res will never reach the top (initiator) address.<o:p></o:p></span></p><p =
class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; fo=
nt-family: 'Times New Roman', serif;"><span style=3D"font-size:11.0pt;font=
-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">[Lizhong] Will add t=
he following:</span></p><p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.=
0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span sty=
le=3D"color: rgb(31, 73, 125); font-family: Calibri, sans-serif; font-size=
: 11pt; line-height: 1.5; background-color: window;">The NIL entry with K =
bit set MUST be deleted, otherwise the Echo Reply message will never be re=
turned.</span></p><p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt=
; font-size: 12pt; font-family: 'Times New Roman', serif;"><span style=3D"=
font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif"><o:p>&nbsp;</=
o:p></span></p><p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; f=
ont-size: 12pt; font-family: 'Times New Roman', serif;"><span style=3D"fon=
t-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif"><o:p>&nbsp;</o:p=
></span></p></div><div><p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0=
001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span styl=
e=3D"font-size:10.5pt;color:black">&nbsp;&nbsp; If a node spans two addres=
sing domains (with respect to this message)<o:p></o:p></span></p></div><di=
v><p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12p=
t; font-family: 'Times New Roman', serif;"><span style=3D"font-size:10.5pt=
;color:black">&nbsp;&nbsp; where nodes on either side may not be able to n=
odes in the other<o:p></o:p></span></p></div><div><p class=3D"MsoNormal" s=
tyle=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New=
 Roman', serif;"><span style=3D"font-size:10.5pt;color:black">&nbsp;&nbsp;=
 domain,<o:p></o:p></span></p></div><div><p class=3D"MsoNormal" style=3D"m=
argin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', =
serif;"><span style=3D"font-size:10.5pt;color:black">&nbsp;<o:p></o:p></sp=
an></p></div><div><p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt=
; font-size: 12pt; font-family: 'Times New Roman', serif;"><span style=3D"=
font-size:10.5pt;color:black">s/may not be able to nodes/may not be able t=
o reach nodes/<o:p></o:p></span></p></div><div><p class=3D"MsoNormal" styl=
e=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Ro=
man', serif;"><span style=3D"font-size:10.5pt;color:black">[Lizhong] accep=
ted<o:p></o:p></span></p></div><div><p class=3D"MsoNormal" style=3D"margin=
: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif=
;"><span style=3D"font-size:10.5pt;color:black">&nbsp;<o:p></o:p></span></=
p></div><div><p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; fon=
t-size: 12pt; font-family: 'Times New Roman', serif;"><span style=3D"font-=
size:10.5pt;color:black">&nbsp;&nbsp; If a node spans two addressing domai=
ns (with respect to this message)<o:p></o:p></span></p></div><div><p class=
=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-fa=
mily: 'Times New Roman', serif;"><span style=3D"font-size:10.5pt;color:bla=
ck">&nbsp;&nbsp; where nodes on either side may not be able to nodes in th=
e other<o:p></o:p></span></p></div><div><p class=3D"MsoNormal" style=3D"ma=
rgin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', s=
erif;"><span style=3D"font-size:10.5pt;color:black">&nbsp;&nbsp; domain, t=
hen the final address added MUST set the K bit.<o:p></o:p></span></p></div=
><div><p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-size:=
 12pt; font-family: 'Times New Roman', serif;"><span style=3D"font-size:10=
.5pt;color:black">&nbsp;<o:p></o:p></span></p></div><div><p class=3D"MsoNo=
rmal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Ti=
mes New Roman', serif;"><span style=3D"font-size:10.5pt;color:black">Above=
 procedures defines a strict operation (i.e., MUST) for the K bit<o:p></o:=
p></span></p></div><div><p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.=
0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span sty=
le=3D"font-size:10.5pt;color:black">usage. However, how an LSR determines =
"If a node spans two addressing<o:p></o:p></span></p></div><div><p class=
=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-fa=
mily: 'Times New Roman', serif;"><span style=3D"font-size:10.5pt;color:bla=
ck">domains where nodes on either side may not be ..." is very vague. It m=
ight<o:p></o:p></span></p></div><div><p class=3D"MsoNormal" style=3D"margi=
n: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', seri=
f;"><span style=3D"font-size:10.5pt;color:black">be possible that we can e=
nd up with different implementations of the K bit<o:p></o:p></span></p></d=
iv><div><p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-siz=
e: 12pt; font-family: 'Times New Roman', serif;"><span style=3D"font-size:=
10.5pt;color:black">setting because of this vagueness. What's your thought=
s?<o:p></o:p></span></p></div><div><p class=3D"MsoNormal" style=3D"margin:=
 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;=
"><span style=3D"font-size:10.5pt;color:black">[Lizhong] this is the princ=
iple of the implementation. How&nbsp;<span style=3D"background:white">to k=
now the&nbsp;</span><o:p></o:p></span></p></div><div><p class=3D"MsoNormal=
" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times =
New Roman', serif;"><span style=3D"font-size:10.5pt;color:black;background=
:white">address information is implementation specific. If fail to get the=
 information,</span><span style=3D"font-size:10.5pt;color:black"><o:p></o:=
p></span></p></div><div><p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.=
0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span sty=
le=3D"font-size:10.5pt;color:black;background:white">then it is possible t=
o fail for the echo reply. Maybe "SHOULD" is better here.<o:p></o:p></span=
></p><p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: =
12pt; font-family: 'Times New Roman', serif;"><span style=3D"font-size:11.=
0pt;font-family:&quot;Calibri&quot;,sans-serif"><o:p>&nbsp;</o:p></span></=
p><p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12p=
t; font-family: 'Times New Roman', serif;"><span style=3D"font-size:11.0pt=
;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">[NOBO] Yes I wo=
uld be more comfortable with SHOULD than MUST.<o:p></o:p></span></p><p cla=
ss=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-=
family: 'Times New Roman', serif;"><span style=3D"font-size:11.0pt;font-fa=
mily:&quot;Calibri&quot;,sans-serif;color:#1F497D">[Lizhong] great.</span>=
</p><p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 1=
2pt; font-family: 'Times New Roman', serif;"><span style=3D"font-size:11.0=
pt;font-family:&quot;Calibri&quot;,sans-serif"><o:p>&nbsp;</o:p></span></p=
></div><div><p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font=
-size: 12pt; font-family: 'Times New Roman', serif;"><span style=3D"font-s=
ize:10.5pt;color:black">&nbsp;<o:p></o:p></span></p></div><div><p class=3D=
"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-famil=
y: 'Times New Roman', serif;"><span style=3D"font-size:10.5pt;color:black"=
>&nbsp;&nbsp; If the full reply message would exceed the MTU size, the Rel=
ay Node<o:p></o:p></span></p></div><div><p class=3D"MsoNormal" style=3D"ma=
rgin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', s=
erif;"><span style=3D"font-size:10.5pt;color:black">&nbsp;&nbsp; Address S=
tack TLV MUST be returned back in the Echo Reply message.<o:p></o:p></span=
></p></div><div><p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; =
font-size: 12pt; font-family: 'Times New Roman', serif;"><span style=3D"fo=
nt-size:10.5pt;color:black">&nbsp;&nbsp; Some other TLV(s) MUST be dropped=
.<o:p></o:p></span></p></div><div><p class=3D"MsoNormal" style=3D"margin: =
0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"=
><span style=3D"font-size:10.5pt;color:black">&nbsp;<o:p></o:p></span></p>=
</div><div><p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-=
size: 12pt; font-family: 'Times New Roman', serif;"><span style=3D"font-si=
ze:10.5pt;color:black">Well, it's possible that the Relay Node Address Sta=
ck TLV has grown so big<o:p></o:p></span></p></div><div><p class=3D"MsoNor=
mal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Tim=
es New Roman', serif;"><span style=3D"font-size:10.5pt;color:black">and th=
at is the only optional TLV to be included in the Echo Reply. In that<o:p>=
</o:p></span></p></div><div><p class=3D"MsoNormal" style=3D"margin: 0cm 0c=
m 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span=
 style=3D"font-size:10.5pt;color:black">case, the Relay Node Address Stack=
 TLV cannot be included despite the<o:p></o:p></span></p></div><div><p cla=
ss=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-=
family: 'Times New Roman', serif;"><span style=3D"font-size:10.5pt;color:b=
lack">"MUST". I believe what you are trying to imply here is that the Rela=
y Node<o:p></o:p></span></p></div><div><p class=3D"MsoNormal" style=3D"mar=
gin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', se=
rif;"><span style=3D"font-size:10.5pt;color:black">Address Stack TLV takes=
 precedence over other optional TLVs, when<o:p></o:p></span></p></div><div=
><p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt=
; font-family: 'Times New Roman', serif;"><span style=3D"font-size:10.5pt;=
color:black">determining which optional TLVs to keep in the Echo Reply. In=
 that case,<o:p></o:p></span></p></div><div><p class=3D"MsoNormal" style=
=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Rom=
an', serif;"><span style=3D"font-size:10.5pt;color:black">perhaps it is be=
tter to say "If the full reply message would exceed the MTU<o:p></o:p></sp=
an></p></div><div><p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt=
; font-size: 12pt; font-family: 'Times New Roman', serif;"><span style=3D"=
font-size:10.5pt;color:black">size, the Relay Node Address Stack TLV SHOUL=
D be included in the Echo Reply<o:p></o:p></span></p></div><div><p class=
=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-fa=
mily: 'Times New Roman', serif;"><span style=3D"font-size:10.5pt;color:bla=
ck">message (i.e., other optional TLVs are excluded)."<o:p></o:p></span></=
p></div><div><p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; fon=
t-size: 12pt; font-family: 'Times New Roman', serif;"><span style=3D"font-=
size:10.5pt;color:black">[Lizhong] agreed.<o:p></o:p></span></p></div><div=
><p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt=
; font-family: 'Times New Roman', serif;"><span style=3D"font-size:10.5pt;=
color:black">&nbsp;<o:p></o:p></span></p></div><div><p class=3D"MsoNormal"=
 style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times N=
ew Roman', serif;"><span style=3D"font-size:10.5pt;color:black">Section 4.=
3<o:p></o:p></span></p></div><div><p class=3D"MsoNormal" style=3D"margin: =
0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"=
><span style=3D"font-size:10.5pt;color:black">--------------<o:p></o:p></s=
pan></p></div><div><p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001p=
t; font-size: 12pt; font-family: 'Times New Roman', serif;"><span style=3D=
"font-size:10.5pt;color:black">&nbsp;<o:p></o:p></span></p></div><div><p c=
lass=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; fon=
t-family: 'Times New Roman', serif;"><span style=3D"font-size:10.5pt;color=
:black">&nbsp;&nbsp; The Destination Address determined in section 4.2 is =
used as the next<o:p></o:p></span></p></div><div><p class=3D"MsoNormal" st=
yle=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New =
Roman', serif;"><span style=3D"font-size:10.5pt;color:black">&nbsp;&nbsp; =
relay node address.<o:p></o:p></span></p></div><div><p class=3D"MsoNormal"=
 style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times N=
ew Roman', serif;"><span style=3D"font-size:10.5pt;color:black">&nbsp;<o:p=
></o:p></span></p></div><div><p class=3D"MsoNormal" style=3D"margin: 0cm 0=
cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><spa=
n style=3D"font-size:10.5pt;color:black">Section 4.2 only describes how to=
 update the Relay Node Address Stack TLV.<o:p></o:p></span></p></div><div>=
<p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt;=
 font-family: 'Times New Roman', serif;"><span style=3D"font-size:10.5pt;c=
olor:black">It also specifies how to update the Destination Address Pointe=
r field.<o:p></o:p></span></p></div><div><p class=3D"MsoNormal" style=3D"m=
argin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', =
serif;"><span style=3D"font-size:10.5pt;color:black">However, nowhere in s=
ection 4.2 talk about how the Destination Address is<o:p></o:p></span></p>=
</div><div><p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-=
size: 12pt; font-family: 'Times New Roman', serif;"><span style=3D"font-si=
ze:10.5pt;color:black">determined. I'm assuming "the Destination Address d=
etermined ..." is<o:p></o:p></span></p></div><div><p class=3D"MsoNormal" s=
tyle=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New=
 Roman', serif;"><span style=3D"font-size:10.5pt;color:black">referring to=
 this address which the Destination Address Pointer is pointing<o:p></o:p>=
</span></p></div><div><p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.00=
01pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span style=
=3D"font-size:10.5pt;color:black">to. Perhaps it'll be a good idea, somewh=
ere in section 4.2, to say "...<o:p></o:p></span></p></div><div><p class=
=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-fa=
mily: 'Times New Roman', serif;"><span style=3D"font-size:10.5pt;color:bla=
ck">_this_ address is determined to be the Destination Address".<o:p></o:p=
></span></p></div><div><p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0=
001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span styl=
e=3D"font-size:10.5pt;color:black">[Lizhong] good catch. See changes below=
:<o:p></o:p></span></p></div><div><p class=3D"MsoNormal" style=3D"margin: =
0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"=
><span style=3D"font-size:10.5pt;color:black">OLD in section 4.2:<o:p></o:=
p></span></p></div><div><p class=3D"MsoNormal" style=3D"text-align: justif=
y; margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roma=
n', serif;"><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-family:&qu=
ot;Calibri&quot;,sans-serif;color:black">The</span><span style=3D"font-siz=
e:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black;background=
:white">&nbsp;Destination Address Pointer MUST be set to this entry.&nbsp;=
</span><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,san=
s-serif;color:black"><o:p></o:p></span></p><p class=3D"MsoNormal" style=3D=
"text-align: justify; margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-fami=
ly: 'Times New Roman', serif;"><span style=3D"font-size:10.5pt;font-family=
:&quot;Calibri&quot;,sans-serif;color:black">NEW<o:p></o:p></span></p><p c=
lass=3D"MsoNormal" style=3D"text-align: justify; margin: 0cm 0cm 0.0001pt;=
 font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang=3D"EN=
-US" style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;=
color:black">The&nbsp;</span><span style=3D"font-size:10.5pt;font-family:&=
quot;Calibri&quot;,sans-serif;color:black;background:white">Destination Ad=
dress Pointer MUST be set to this entry which is also the&nbsp;</span><spa=
n style=3D"font-size:10.5pt;color:black;background:white">Destination Addr=
ess.</span><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;=
,sans-serif;color:black"><o:p></o:p></span></p></div><div><p class=3D"MsoN=
ormal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'T=
imes New Roman', serif;"><span style=3D"font-size:10.5pt;color:black">&nbs=
p;<o:p></o:p></span></p></div><div><p class=3D"MsoNormal" style=3D"margin:=
 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;=
"><span style=3D"font-size:10.5pt;color:black">Section 4.4<o:p></o:p></spa=
n></p></div><div><p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt;=
 font-size: 12pt; font-family: 'Times New Roman', serif;"><span style=3D"f=
ont-size:10.5pt;color:black">--------------<o:p></o:p></span></p></div><di=
v><p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12p=
t; font-family: 'Times New Roman', serif;"><span style=3D"font-size:10.5pt=
;color:black">&nbsp;<o:p></o:p></span></p></div><div><p class=3D"MsoNormal=
" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times =
New Roman', serif;"><span style=3D"font-size:10.5pt;color:black">&nbsp;&nb=
sp; Upon receiving an Relayed Echo Reply message with its own address as<o=
:p></o:p></span></p></div><div><p class=3D"MsoNormal" style=3D"margin: 0cm=
 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><s=
pan style=3D"font-size:10.5pt;color:black">&nbsp;&nbsp; the destination ad=
dress in the IP header, the relay node MUST<o:p></o:p></span></p></div><di=
v><p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12p=
t; font-family: 'Times New Roman', serif;"><span style=3D"font-size:10.5pt=
;color:black">&nbsp;&nbsp; determine the next relay node address as descri=
bed in section 4.3,<o:p></o:p></span></p></div><div><p class=3D"MsoNormal"=
 style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times N=
ew Roman', serif;"><span style=3D"font-size:10.5pt;color:black">&nbsp;&nbs=
p; with the modification that the location of the received Destination<o:p=
></o:p></span></p></div><div><p class=3D"MsoNormal" style=3D"margin: 0cm 0=
cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><spa=
n style=3D"font-size:10.5pt;color:black">&nbsp;&nbsp; Address is used inst=
ead of the bottom of stack in the algorithm.<o:p></o:p></span></p></div><d=
iv><p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12=
pt; font-family: 'Times New Roman', serif;"><span style=3D"font-size:10.5p=
t;color:black">&nbsp;<o:p></o:p></span></p></div><div><p class=3D"MsoNorma=
l" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times=
 New Roman', serif;"><span style=3D"font-size:10.5pt;color:black">In above=
, I think you meant section 4.2 instead of section 4.3.<o:p></o:p></span><=
/p></div><div><p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; fo=
nt-size: 12pt; font-family: 'Times New Roman', serif;"><span style=3D"font=
-size:10.5pt;color:black">[Lizhong] accepted<o:p></o:p></span></p></div><d=
iv><p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12=
pt; font-family: 'Times New Roman', serif;"><span style=3D"font-size:10.5p=
t;color:black">&nbsp;<o:p></o:p></span></p></div><div><p class=3D"MsoNorma=
l" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times=
 New Roman', serif;"><span style=3D"font-size:10.5pt;color:black">&nbsp;&n=
bsp; The<o:p></o:p></span></p></div><div><p class=3D"MsoNormal" style=3D"m=
argin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', =
serif;"><span style=3D"font-size:10.5pt;color:black">&nbsp;&nbsp; destinat=
ion address in Relay Node Address Stack TLV will be updated<o:p></o:p></sp=
an></p></div><div><p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt=
; font-size: 12pt; font-family: 'Times New Roman', serif;"><span style=3D"=
font-size:10.5pt;color:black">&nbsp;&nbsp; with the next relay node addres=
s.<o:p></o:p></span></p></div><div><p class=3D"MsoNormal" style=3D"margin:=
 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;=
"><span style=3D"font-size:10.5pt;color:black">&nbsp;<o:p></o:p></span></p=
></div><div><p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font=
-size: 12pt; font-family: 'Times New Roman', serif;"><span style=3D"font-s=
ize:10.5pt;color:black">By "destination address" above, do you mean the De=
stination Address Pointer<o:p></o:p></span></p></div><div><p class=3D"MsoN=
ormal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'T=
imes New Roman', serif;"><span style=3D"font-size:10.5pt;color:black">fiel=
d? If so, a bit of clarification is required. Otherwise, I'm not sure<o:p>=
</o:p></span></p></div><div><p class=3D"MsoNormal" style=3D"margin: 0cm 0c=
m 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span=
 style=3D"font-size:10.5pt;color:black">what you mean by "destination addr=
ess" above.<o:p></o:p></span></p></div><div><p class=3D"MsoNormal" style=
=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Rom=
an', serif;"><span style=3D"font-size:10.5pt;color:black">[Lizhong] yes, c=
hanged as below:<o:p></o:p></span></p></div><div><p class=3D"MsoNormal" st=
yle=3D"text-align: justify; margin: 0cm 0cm 0.0001pt; font-size: 12pt; fon=
t-family: 'Times New Roman', serif;"><span lang=3D"EN-US" style=3D"font-si=
ze:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">The&nbsp=
;</span><span lang=3D"EN-US" style=3D"font-size:10.5pt;color:black;backgro=
und:white">Destination Address Pointer</span><span lang=3D"EN-US" style=3D=
"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black;b=
ackground:white"> in Relay Node Address Stack TLV will be set to</span><sp=
an style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;co=
lor:black"><o:p></o:p></span></p><p class=3D"MsoNormal" style=3D"margin: 0=
cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;">=
<span lang=3D"EN-US" style=3D"font-size:10.5pt;font-family:&quot;Calibri&q=
uot;,sans-serif;color:black;mso-fareast-language:ZH-CN">&nbsp;&nbsp; the n=
ext relay node address.&nbsp;</span><span style=3D"font-size:10.5pt;color:=
black"><o:p></o:p></span></p></div><div><p class=3D"MsoNormal" style=3D"ma=
rgin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', s=
erif;"><span style=3D"font-size:10.5pt;color:black">&nbsp;<o:p></o:p></spa=
n></p></div><div><p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt;=
 font-size: 12pt; font-family: 'Times New Roman', serif;"><span style=3D"f=
ont-size:10.5pt;color:black">The document is not very clear on how these t=
wo fields are used.<o:p></o:p></span></p></div><div><p class=3D"MsoNormal"=
 style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times N=
ew Roman', serif;"><span style=3D"font-size:10.5pt;color:black">- Source I=
P address field of the IP header<o:p></o:p></span></p></div><div><p class=
=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-fa=
mily: 'Times New Roman', serif;"><span style=3D"font-size:10.5pt;color:bla=
ck">- Source Address of Replying Router field of the Relay Node Address St=
ack<o:p></o:p></span></p></div><div><p class=3D"MsoNormal" style=3D"margin=
: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif=
;"><span style=3D"font-size:10.5pt;color:black">TLV<o:p></o:p></span></p><=
/div><div><p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-s=
ize: 12pt; font-family: 'Times New Roman', serif;"><span style=3D"font-siz=
e:10.5pt;color:black">&nbsp;<o:p></o:p></span></p></div><div><p class=3D"M=
soNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family:=
 'Times New Roman', serif;"><span style=3D"font-size:10.5pt;color:black">I=
'd imagine you'd want one field to be set by the egress LSR and unmodified=
<o:p></o:p></span></p></div><div><p class=3D"MsoNormal" style=3D"margin: 0=
cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;">=
<span style=3D"font-size:10.5pt;color:black">by every upstream relay LSRs,=
 and one field to be updated by the egress LSR<o:p></o:p></span></p></div>=
<div><p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: =
12pt; font-family: 'Times New Roman', serif;"><span style=3D"font-size:10.=
5pt;color:black">and every upstream relay LSR. This is sort of clarified i=
n section 4.7, but<o:p></o:p></span></p></div><div><p class=3D"MsoNormal" =
style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times Ne=
w Roman', serif;"><span style=3D"font-size:10.5pt;color:black">really shou=
ld be part of the procedures.<o:p></o:p></span></p></div><div><p class=3D"=
MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family=
: 'Times New Roman', serif;"><span style=3D"font-size:10.5pt;color:black">=
[Lizhong] in section 4.2, it says as below:<o:p></o:p></span></p></div><di=
v><p class=3D"MsoNormal" style=3D"text-align: justify; margin: 0cm 0cm 0.0=
001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang=
=3D"EN-US" style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-=
serif;color:black">&nbsp; &nbsp;Upon receiving a Relay Node Address Stack =
TLV in an Echo Request</span><span style=3D"font-size:10.5pt;font-family:&=
quot;Calibri&quot;,sans-serif;color:black"><o:p></o:p></span></p><p class=
=3D"MsoNormal" style=3D"text-align: justify; margin: 0cm 0cm 0.0001pt; fon=
t-size: 12pt; font-family: 'Times New Roman', serif;"><span lang=3D"EN-US"=
 style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;colo=
r:black">&nbsp;&nbsp; message, the receiver updates the "Source Address of=
 Replying</span><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&=
quot;,sans-serif;color:black"><o:p></o:p></span></p><p class=3D"MsoNormal"=
 style=3D"text-align: justify; margin: 0cm 0cm 0.0001pt; font-size: 12pt; =
font-family: 'Times New Roman', serif;"><span lang=3D"EN-US" style=3D"font=
-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">&nbsp=
;&nbsp; Router".&nbsp; The address MUST be same as the source IP address o=
f Relay</span><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&qu=
ot;,sans-serif;color:black"><o:p></o:p></span></p><p class=3D"MsoNormal" s=
tyle=3D"text-align: justify; margin: 0cm 0cm 0.0001pt; font-size: 12pt; fo=
nt-family: 'Times New Roman', serif;"><span lang=3D"EN-US" style=3D"font-s=
ize:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">&nbsp;&=
nbsp; Echo Reply (section 4.3) or Echo Reply message (section 4.5) being</=
span><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-=
serif;color:black"><o:p></o:p></span></p><p class=3D"MsoNormal" style=3D"t=
ext-align: justify; margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family=
: 'Times New Roman', serif;"><span lang=3D"EN-US" style=3D"font-size:10.5p=
t;font-family:&quot;Calibri&quot;,sans-serif;color:black">&nbsp;&nbsp; sen=
t.</span><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,s=
ans-serif;color:black"><o:p></o:p></span></p><p class=3D"MsoNormal" style=
=3D"text-align: justify; margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-f=
amily: 'Times New Roman', serif;"><span lang=3D"EN-US" style=3D"font-size:=
10.5pt;color:black">How to set Source IP address field of the IP header is=
 a standard behavior, and</span><span style=3D"font-size:10.5pt;font-famil=
y:&quot;Calibri&quot;,sans-serif;color:black"><o:p></o:p></span></p><p cla=
ss=3D"MsoNormal" style=3D"text-align: justify; margin: 0cm 0cm 0.0001pt; f=
ont-size: 12pt; font-family: 'Times New Roman', serif;"><span lang=3D"EN-U=
S" style=3D"font-size:10.5pt;color:black">not speicified in this document.=
</span><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,san=
s-serif;color:black"><o:p></o:p></span></p><p class=3D"MsoNormal" style=3D=
"text-align: justify; margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-fami=
ly: 'Times New Roman', serif;"><span lang=3D"EN-US" style=3D"font-size:10.=
5pt"><o:p>&nbsp;</o:p></span></p><p class=3D"MsoNormal" style=3D"margin: 0=
cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;">=
<span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif=
;color:#1F497D">[NOBO] Yes but when receiving an Relayed Echo Reply, how a=
re those two fields updated? I=E2=80=99m guessing that the Source Address =
of Replying Router field is unmodified, and Source IP address field of the=
 IP header is set to an address of the relay node? Clarifying this point w=
ill&nbsp; be beneficial.</span><span style=3D"font-size:11.0pt;font-family=
:&quot;Calibri&quot;,sans-serif"><o:p></o:p></span></p><p class=3D"MsoNorm=
al" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Time=
s New Roman', serif;"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">[Lizhong] your understanding is righ=
t. Add the following to section 4.3, 4.4 and 4.5.</span></p><p class=3D"Ms=
oNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: =
'Times New Roman', serif;"><span style=3D"color: rgb(31, 73, 125); font-fa=
mily: Calibri, sans-serif; font-size: 15px; line-height: 22px;">The Source=
 Address of Replying Router field is kept unmodified,&nbsp;</span><span st=
yle=3D"color: rgb(31, 73, 125); font-family: Calibri, sans-serif; font-siz=
e: 15px; line-height: 22px;">and Source IP address field of the IP header =
is set to an address of the sending node.</span><span style=3D"color: rgb(=
31, 73, 125); font-family: Calibri, sans-serif; font-size: 15px; line-heig=
ht: 22px;">&nbsp;</span></p><p class=3D"MsoNormal" style=3D"text-align: ju=
stify; margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New =
Roman', serif;"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color:black=
"><br><br></span><span style=3D"font-size:10.5pt;font-family:&quot;Calibri=
&quot;,sans-serif;color:black"><o:p></o:p></span></p></div><div><p class=
=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-fa=
mily: 'Times New Roman', serif;"><span style=3D"font-size:10.5pt;color:bla=
ck">&nbsp;<o:p></o:p></span></p></div><div><p class=3D"MsoNormal" style=3D=
"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman'=
, serif;"><span style=3D"font-size:10.5pt;color:black">Section 4.6<o:p></o=
:p></span></p></div><div><p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0=
.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span st=
yle=3D"font-size:10.5pt;color:black">--------------<o:p></o:p></span></p><=
/div><div><p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-s=
ize: 12pt; font-family: 'Times New Roman', serif;"><span style=3D"font-siz=
e:10.5pt;color:black">&nbsp;<o:p></o:p></span></p></div><div><p class=3D"M=
soNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family:=
 'Times New Roman', serif;"><span style=3D"font-size:10.5pt;color:black">&=
nbsp;&nbsp; During a traceroute operation, multiple Echo Request messages =
are<o:p></o:p></span></p></div><div><p class=3D"MsoNormal" style=3D"margin=
: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif=
;"><span style=3D"font-size:10.5pt;color:black">&nbsp;&nbsp; sent.&nbsp; E=
ach time the TTL is increased, the initiator MUST copy the<o:p></o:p></spa=
n></p></div><div><p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt;=
 font-size: 12pt; font-family: 'Times New Roman', serif;"><span style=3D"f=
ont-size:10.5pt;color:black">&nbsp;&nbsp; Relay Node Address Stack TLV rec=
eived in the previous Echo Reply to<o:p></o:p></span></p></div><div><p cla=
ss=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-=
family: 'Times New Roman', serif;"><span style=3D"font-size:10.5pt;color:b=
lack">&nbsp;&nbsp; the next Echo Request.<o:p></o:p></span></p></div><div>=
<p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt;=
 font-family: 'Times New Roman', serif;"><span style=3D"font-size:10.5pt;c=
olor:black">&nbsp;<o:p></o:p></span></p></div><div><p class=3D"MsoNormal" =
style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times Ne=
w Roman', serif;"><span style=3D"font-size:10.5pt;color:black">True but do=
n't we want the initiator to "reset" some fields such as Reply<o:p></o:p><=
/span></p></div><div><p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.000=
1pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span style=
=3D"font-size:10.5pt;color:black">Add Type, Source Address of Replying Rou=
ter and Destination Address Pointer?<o:p></o:p></span></p></div><div><p cl=
ass=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font=
-family: 'Times New Roman', serif;"><span style=3D"font-size:10.5pt;color:=
black">[Lizhong]&nbsp;<span style=3D"background:white">these fields will b=
e reset by the reply node. But this section should still</span><o:p></o:p>=
</span></p></div><div><p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.00=
01pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span style=
=3D"font-size:10.5pt;color:black;background:white">be updated as described=
 in previous comments.<o:p></o:p></span></p><p class=3D"MsoNormal" style=
=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Rom=
an', serif;"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quo=
t;,sans-serif"><o:p>&nbsp;</o:p></span></p><p class=3D"MsoNormal" style=3D=
"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman'=
, serif;"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,=
sans-serif;color:#1F497D">[NOBO] I simply assumed that we want to clear:<o=
:p></o:p></span></p><p class=3D"MsoListParagraph" style=3D"margin: 0cm 0cm=
 0.0001pt 36pt; text-indent: -18pt; font-size: 12pt; font-family: 'Times N=
ew Roman', serif;"><!--[if !supportLists]--><span style=3D"font-size:11.0p=
t;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"><span style=3D=
"mso-list:Ignore">-<span style=3D"font:7.0pt &quot;Times New Roman&quot;">=
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span></span><!--[endif=
]--><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-s=
erif;color:#1F497D">the Source Address of Replying Router field (along wit=
h reply Add Type)</span><span style=3D"font-size:11.0pt;font-family:&quot;=
Calibri&quot;,sans-serif"><o:p></o:p></span></p><p class=3D"MsoListParagra=
ph" style=3D"margin: 0cm 0cm 0.0001pt 36pt; text-indent: -18pt; font-size:=
 12pt; font-family: 'Times New Roman', serif;"><!--[if !supportLists]--><s=
pan style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;c=
olor:#1F497D"><span style=3D"mso-list:Ignore">-<span style=3D"font:7.0pt &=
quot;Times New Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </s=
pan></span></span><!--[endif]--><span style=3D"font-size:11.0pt;font-famil=
y:&quot;Calibri&quot;,sans-serif;color:#1F497D">Destination Address Pointe=
r</span><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif"><o:p></o:p></span></p><p class=3D"MsoNormal" style=3D"margin: 0c=
m 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><=
span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;=
color:#1F497D">Since value of those fields are meaningless to the subseque=
nt Echo Request. Is there any reason why you want to preserve those values=
 for the subsequent Echo Request?<o:p></o:p></span></p><p class=3D"MsoNorm=
al" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Time=
s New Roman', serif;"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">[Lizhong] Whether reseting the two f=
ields will not affect the protocol function. Reseting two fields seems to =
be redundant. But if you like, we could say:</span></p><div><p class=3D"Ms=
oNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: =
'Times New Roman', serif;"><span style=3D"font-size: 10.5pt;">Reply&nbsp;<=
/span><span style=3D"font-size: 10.5pt; line-height: 1.5; background-color=
: window;">Add Type, Source Address of Replying Router and Destination Add=
ress Pointer MAY be reset to 0.</span></p></div><p class=3D"MsoNormal" sty=
le=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New R=
oman', serif;"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&q=
uot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p><p class=3D"Mso=
Normal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: '=
Times New Roman', serif;"><span style=3D"font-size:11.0pt;font-family:&quo=
t;Calibri&quot;,sans-serif;color:#1F497D">Thanks,<o:p></o:p></span></p><p =
class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; fo=
nt-family: 'Times New Roman', serif;"><span style=3D"font-size:11.0pt;font=
-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">Nobo<o:p></o:p></spa=
n></p><p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-size:=
 12pt; font-family: 'Times New Roman', serif;"><span style=3D"font-size:11=
.0pt;font-family:&quot;Calibri&quot;,sans-serif"><o:p>&nbsp;</o:p></span><=
/p></div><div><p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; fo=
nt-size: 12pt; font-family: 'Times New Roman', serif;"><span style=3D"font=
-size:10.5pt;color:black">&nbsp;<o:p></o:p></span></p></div><div><p class=
=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-fa=
mily: 'Times New Roman', serif;"><span style=3D"font-size:10.5pt;color:bla=
ck">Section 6<o:p></o:p></span></p></div><div><p class=3D"MsoNormal" style=
=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Rom=
an', serif;"><span style=3D"font-size:10.5pt;color:black">--------------<o=
:p></o:p></span></p></div><div><p class=3D"MsoNormal" style=3D"margin: 0cm=
 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><s=
pan style=3D"font-size:10.5pt;color:black">&nbsp;<o:p></o:p></span></p></d=
iv><div><p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-siz=
e: 12pt; font-family: 'Times New Roman', serif;"><span style=3D"font-size:=
10.5pt;color:black">As an added security, a receiver of an MPLS Echo Reque=
st should verify that<o:p></o:p></span></p></div><div><p class=3D"MsoNorma=
l" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times=
 New Roman', serif;"><span style=3D"font-size:10.5pt;color:black">the firs=
t address in the Relay Node Address Stack TLV is the same address as<o:p><=
/o:p></span></p></div><div><p class=3D"MsoNormal" style=3D"margin: 0cm 0cm=
 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span =
style=3D"font-size:10.5pt;color:black">the source IP address field of the =
received IP header.<o:p></o:p></span></p></div><div><p class=3D"MsoNormal"=
 style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times N=
ew Roman', serif;"><span style=3D"font-size:10.5pt;color:black">[Lizhong] =
accepted, thanks.<o:p></o:p></span></p></div><div><p class=3D"MsoNormal" s=
tyle=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New=
 Roman', serif;"><span style=3D"font-size:10.5pt;color:black">&nbsp;<o:p><=
/o:p></span></p></div><div><p class=3D"MsoNormal" style=3D"margin: 0cm 0cm=
 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span =
style=3D"font-size:10.5pt;color:black">Thanks!<o:p></o:p></span></p></div>=
<div><p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: =
12pt; font-family: 'Times New Roman', serif;"><span style=3D"font-size:10.=
5pt;color:black">&nbsp;<o:p></o:p></span></p></div><div><p class=3D"MsoNor=
mal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Tim=
es New Roman', serif;"><span style=3D"font-size:10.5pt;color:black">-Nobo<=
o:p></o:p></span></p></div><div><p class=3D"MsoNormal" style=3D"margin: 0c=
m 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><=
span style=3D"font-size:10.5pt;color:black">&nbsp;<o:p></o:p></span></p></=
div><div><p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-si=
ze: 12pt; font-family: 'Times New Roman', serif;"><span style=3D"font-size=
:10.5pt;color:black">&nbsp;<o:p></o:p></span></p></div></div></blockquote>=
</div></div></div></div></blockquote>=0A</body></html>
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