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Date: Thu, 20 Nov 2008 15:02:48 +0530 (IST)
From: Subinoy Das <subinoy_das_82@yahoo.com>
Subject: Query about upstrean assigned label from
 draft-ietf-l3vpn-2547bis-mcast-07.txt
To: l3vpn@ietf.org
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Hi,=0A=0ASection Point 5 in 7.4.1.1. Advertising C-flow Binding to P-Tunnel=
 in draft-ietf-l3vpn-2547bis-mcast-07.txt says =0A=0A"If at least some of t=
he S-PMSIs aggregated onto the same=0AP-tunnel belong to different MVPNs, t=
hen all these routes MUST=0Acarry an MPLS upstream assigned label [MPLS-UPS=
TREAM-LABEL,=0Asection 6.3.4]. If all these aggregated S-PMSIs belong to th=
e=0Asame MVPN, then the routes MAY carry an MPLS upstream assigned=0Alabel =
[MPLS-UPSTREAM-LABEL]. The labels MUST be distinct on a=0Aper MVPN basis, a=
nd MAY be distinct on a per route basis."=0A=0AI do not understand where 1 =
label per MVPN solves everything then what is the need to use 1 label per r=
oute. What is the need to keep multiple label for a single MVPN per PE rout=
er?=0A=0ARegards,=0ASubinoy=0A=0A=0A=0A      Add more friends to your messe=
nger and enjoy! Go to http://messenger.yahoo.com/invite/
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<html><head><style type=3D"text/css"><!-- DIV {margin:0px;} --></style></he=
ad><body><div style=3D"font-family:times new roman,new york,times,serif;fon=
t-size:12pt"><div>Hi,<br><br>Section Point 5 in 7.4.1.1. Advertising C-flow=
 Binding to P-Tunnel in draft-ietf-l3vpn-2547bis-mcast-07.txt says <br><br>=
"If at least some of the S-PMSIs aggregated onto the same<br>P-tunnel belon=
g to different MVPNs, then all these routes MUST<br>carry an MPLS upstream =
assigned label [MPLS-UPSTREAM-LABEL,<br>section 6.3.4]. <span style=3D"text=
-decoration: underline;">If all these aggregated S-PMSIs belong to the</spa=
n><br style=3D"text-decoration: underline;"><span style=3D"text-decoration:=
 underline;">same MVPN, then the routes MAY carry an MPLS upstream assigned=
</span><br style=3D"text-decoration: underline;"><span style=3D"text-decora=
tion: underline;">label</span> [MPLS-UPSTREAM-LABEL]. The labels MUST be di=
stinct on a<br>per MVPN basis, and <span style=3D"text-decoration: underlin=
e;">MAY
 be distinct on a per route basis</span>."<br><br>I do not understand where=
 1 label per MVPN solves everything then what is the need to use 1 label pe=
r route. What is the need to keep multiple label for a single MVPN per PE r=
outer?<br><br>Regards,<br>Subinoy<br></div></div><br>=0A      <!--6--><hr s=
ize=3D1></hr> Add more friends to your messenger and enjoy! <a href=3D"http=
://in.rd.yahoo.com/tagline_messenger_6/*http://messenger.yahoo.com/invite/"=
> Invite them now.</a></body></html>
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