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From: Linda Dunbar <linda.dunbar@futurewei.com>
To: "Chengli (Cheng Li)" <c.l=40huawei.com@dmarc.ietf.org>, Susan Hares
 <shares@ndzh.com>, "idr@ietf.org" <idr@ietf.org>
Thread-Topic: Adoption call for
 draft-dunbar-idr-5g-edge-compute-app-meta-data-09.txt (7/29/2022 to
 8/12/2022)
Thread-Index: AdijNQ+IfMfPCoxlRY2mLEfIE5uYeQOHZVlwAABIZIAAEb9TUA==
Date: Tue, 16 Aug 2022 18:12:17 +0000
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Archived-At: <https://mailarchive.ietf.org/arch/msg/idr/0wuzE5xJipWbo5iGjARmoqXec2I>
Subject: Re: [Idr] Adoption call for
 draft-dunbar-idr-5g-edge-compute-app-meta-data-09.txt (7/29/2022 to
 8/12/2022)
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--_000_CO1PR13MB4920C7BB2525D199B1312B0D856B9CO1PR13MB4920namp_
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Cheng,

Thank you very much for the questions.
Two other people have also suggested to carry the app meta data in the path=
 attribute, maybe creating a new subTLV  (Load Index Sub-TLV and Site Prefe=
rence Sub TLV) under the Opaque Extended community?

Answer to your second question is inserted below:


-----Original Message-----
From: Idr <idr-bounces@ietf.org> On Behalf Of Chengli (Cheng Li)
Sent: Tuesday, August 16, 2022 4:38 AM
To: Chengli (Cheng Li) <c.l=3D40huawei.com@dmarc.ietf.org>; Susan Hares <sh=
ares@ndzh.com>; idr@ietf.org
Subject: Re: [Idr] Adoption call for draft-dunbar-idr-5g-edge-compute-app-m=
eta-data-09.txt (7/29/2022 to 8/12/2022)

I am not really understand the meeting of only setting  =3D> I am not reall=
y understand the meaning of only setting


-----Original Message-----
From: Idr [mailto:idr-bounces@ietf.org] On Behalf Of Chengli (Cheng Li)
Sent: Tuesday, August 16, 2022 5:35 PM
To: Susan Hares <shares@ndzh.com<mailto:shares@ndzh.com>>; idr@ietf.org<mai=
lto:idr@ietf.org>
Subject: Re: [Idr] Adoption call for draft-dunbar-idr-5g-edge-compute-app-m=
eta-data-09.txt (7/29/2022 to 8/12/2022)

Hi Sue and IDRers,

I read the draft and support the adoption with comments.

1. It may be good to use a new Path Attribute instead of putting TLV into T=
unnel Encap Path attributes IMHO. This can be discussed after the adoption.=
 The main idea of distributing APP metadata is useful.
2. Regarding the weighted Load Index[1]  in section 4.1. I am not really un=
derstand the meeting of only setting four weight for four types of metrics.=
 It may need to comparing with the Capacity? Hope to see more clarification=
 of this in the next revision.

[Linda] all the attributes have different units, such as Capacity has a num=
ber (1-00), load index can be (1-100), but bandwidth is represented as Gbts=
/s. We need one single value for FIB to choose the optimal path. The Weight=
s, which are configured, are used to combine attributes with different unit=
s to one single value, to make it easier for FIB to compare.

Linda

Generally, I think this is a good starting point of a WG document, and woul=
d like to contribute to the draft if possible.
More reply, please see below.

Thanks and respect,
Cheng

[1]. https://nam11.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F%2Fda=
tatracker.ietf.org%2Fdoc%2Fhtml%2Fdraft-dunbar-idr-5g-edge-compute-app-meta=
-data-10%23section-4.1&amp;data=3D05%7C01%7Clinda.dunbar%40futurewei.com%7C=
d536f3405fa34f25c8ec08da7f6b084d%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C0=
%7C637962394943360317%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV=
2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&amp;sdata=3DLNQFrgJIp=
7gQi7wktsxktrMWI9O9pe8rgqSB3lUNHj8%3D&amp;reserved=3D0




-----Original Message-----
From: Idr [mailto:idr-bounces@ietf.org] On Behalf Of Susan Hares
Sent: Friday, July 29, 2022 6:23 PM
To: idr@ietf.org<mailto:idr@ietf.org>
Subject: [Idr] Adoption call for draft-dunbar-idr-5g-edge-compute-app-meta-=
data-09.txt (7/29/2022 to 8/12/2022)

This begins a 3 week WG Adoption call for draft-dunbar-idr-5g-edge-compute-=
app-meta-data-09.txt
https://nam11.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F%2Fdatatra=
cker.ietf.org%2Fdoc%2Fdraft-dunbar-idr-5g-edge-compute-app-meta-data%2F&amp=
;data=3D05%7C01%7Clinda.dunbar%40futurewei.com%7Cd536f3405fa34f25c8ec08da7f=
6b084d%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C0%7C637962394943517327%7CUn=
known%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJ=
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nrmlBZZw%3D&amp;reserved=3D0

This draft proposes a new SubTLV (AppMetaData) for the BGP Tunnel Encapsula=
tion Attribute [RFC9012] that indicates the running status and environment =
of directly attached 5G Edge Computing (EC) instances.

The AppMetaData can be used by routers in the 5G Local Data Network to make=
 path selection not only based on the routing distance but also the running=
 environment of the destinations. The goal is to improve latency and perfor=
mance for 5G EC services.

In your discussion of this adoption call, please consider these questions:

1) The addition of this type of information to tunnels is useful for inter-=
domain routing within 5G networks?
[Cheng]Yes, it is useful. But I have concern of where to put the informatio=
n.

2) What type of additional load this data to Basic Tunnel encapsulation [RF=
C9012]?
[Cheng]Sorry, I do not really get this question.  But it is different with =
SR policy for sure.

For example is the load placed by this draft equal or Less than the SR rout=
ing additions from such as draft-ietf-idr-segment-routing-te-policy?

3) Will the addition of this information aid Routing in 5G networks?
[Cheng] it can help in 5G networks.


Cheers, Sue Hares

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<font face=3D"Calibri" size=3D"2"><span style=3D"font-size:11pt;">
<div>Cheng, </div>
<div>&nbsp;</div>
<div>Thank you very much for the questions. </div>
<div>Two other people have also suggested to carry the app meta data in the=
 path attribute, maybe creating a new subTLV  (Load Index Sub-TLV and Site =
Preference Sub TLV) under the Opaque Extended community? </div>
<div>&nbsp;</div>
<div>Answer to your second question is inserted below:</div>
<div><font face=3D"Times New Roman">&nbsp;</font></div>
<div><font face=3D"Times New Roman">&nbsp;</font></div>
<div>-----Original Message-----<br>

From: Idr &lt;idr-bounces@ietf.org&gt; On Behalf Of Chengli (Cheng Li)<br>

Sent: Tuesday, August 16, 2022 4:38 AM<br>

To: Chengli (Cheng Li) &lt;c.l=3D40huawei.com@dmarc.ietf.org&gt;; Susan Har=
es &lt;shares@ndzh.com&gt;; idr@ietf.org<br>

Subject: Re: [Idr] Adoption call for draft-dunbar-idr-5g-edge-compute-app-m=
eta-data-09.txt (7/29/2022 to 8/12/2022)</div>
<div><font face=3D"Times New Roman">&nbsp;</font></div>
<div>I am not really understand the meeting of only setting&nbsp; =3D&gt; I=
 am not really understand the meaning of only setting</div>
<div>&nbsp;</div>
<div>&nbsp;</div>
<div>-----Original Message-----</div>
<div>From: Idr [<a href=3D"mailto:idr-bounces@ietf.org">mailto:idr-bounces@=
ietf.org</a>] On Behalf Of Chengli (Cheng Li)</div>
<div>Sent: Tuesday, August 16, 2022 5:35 PM</div>
<div>To: Susan Hares &lt;<a href=3D"mailto:shares@ndzh.com">shares@ndzh.com=
</a>&gt;; <a href=3D"mailto:idr@ietf.org">idr@ietf.org</a></div>
<div>Subject: Re: [Idr] Adoption call for draft-dunbar-idr-5g-edge-compute-=
app-meta-data-09.txt (7/29/2022 to 8/12/2022)</div>
<div>&nbsp;</div>
<div>Hi Sue and IDRers,</div>
<div>&nbsp;</div>
<div>I read the draft and support the adoption with comments.</div>
<div>&nbsp;</div>
<div>1. It may be good to use a new Path Attribute instead of putting TLV i=
nto Tunnel Encap Path attributes IMHO. This can be discussed after the adop=
tion. The main idea of distributing APP metadata is useful.</div>
<div>2. Regarding the weighted Load Index[1]&nbsp; in section 4.1. I am not=
 really understand the meeting of only setting four weight for four types o=
f metrics. It may need to comparing with the Capacity? Hope to see more cla=
rification of this in the next revision.</div>
<div><font face=3D"Times New Roman">&nbsp;</font></div>
<div><font color=3D"#0070C0">[Linda] all the attributes have different unit=
s, such as Capacity has a number (1-00), load index can be (1-100), but ban=
dwidth is represented as Gbts/s. We need one single value for FIB to choose=
 the optimal path. The Weights, which
are configured, are used to combine attributes with different units to one =
single value, to make it easier for FIB to compare. </font></div>
<div><font color=3D"#0070C0">&nbsp;</font></div>
<div><font color=3D"#0070C0">Linda</font></div>
<div><font face=3D"Times New Roman">&nbsp;</font></div>
<div>Generally, I think this is a good starting point of a WG document, and=
 would like to contribute to the draft if possible.</div>
<div>More reply, please see below.</div>
<div>&nbsp;</div>
<div>Thanks and respect,</div>
<div>Cheng</div>
<div>&nbsp;</div>
<div>[1]. <a href=3D"https://nam11.safelinks.protection.outlook.com/?url=3D=
https%3A%2F%2Fdatatracker.ietf.org%2Fdoc%2Fhtml%2Fdraft-dunbar-idr-5g-edge-=
compute-app-meta-data-10%23section-4.1&amp;amp;data=3D05%7C01%7Clinda.dunba=
r%40futurewei.com%7Cd536f3405fa34f25c8ec08da7f6b084d%7C0fee8ff2a3b240189c75=
3a1d5591fedc%7C1%7C0%7C637962394943360317%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiM=
C4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&a=
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ved=3D0">https://nam11.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F%=
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i.com%7Cd536f3405fa34f25c8ec08da7f6b084d%7C0fee8ff2a3b240189c753a1d5591fedc=
%7C1%7C0%7C637962394943360317%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiL=
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=3DLNQFrgJIp7gQi7wktsxktrMWI9O9pe8rgqSB3lUNHj8%3D&amp;amp;reserved=3D0</a><=
/div>
<div><font face=3D"Times New Roman">&nbsp;</font></div>
<div><font face=3D"Times New Roman">&nbsp;</font></div>
<div><font face=3D"Times New Roman">&nbsp;</font></div>
<div><font face=3D"Times New Roman">&nbsp;</font></div>
<div>-----Original Message-----</div>
<div>From: Idr [<a href=3D"mailto:idr-bounces@ietf.org">mailto:idr-bounces@=
ietf.org</a>] On Behalf Of Susan Hares</div>
<div>Sent: Friday, July 29, 2022 6:23 PM</div>
<div>To: <a href=3D"mailto:idr@ietf.org">idr@ietf.org</a></div>
<div>Subject: [Idr] Adoption call for draft-dunbar-idr-5g-edge-compute-app-=
meta-data-09.txt (7/29/2022 to 8/12/2022)</div>
<div>&nbsp;</div>
<div>This begins a 3 week WG Adoption call for draft-dunbar-idr-5g-edge-com=
pute-app-meta-data-09.txt</div>
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dunbar%40futurewei.com%7Cd536f3405fa34f25c8ec08da7f6b084d%7C0fee8ff2a3b2401=
89c753a1d5591fedc%7C1%7C0%7C637962394943517327%7CUnknown%7CTWFpbGZsb3d8eyJW=
IjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C=
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<div><font face=3D"Times New Roman">&nbsp;</font></div>
<div>This draft proposes a new SubTLV (AppMetaData) for the BGP Tunnel Enca=
psulation Attribute [RFC9012] that indicates the running status and environ=
ment of directly attached 5G Edge Computing (EC) instances.</div>
<div>&nbsp;</div>
<div>The AppMetaData can be used by routers in the 5G Local Data Network to=
 make path selection not only based on the routing distance but also the ru=
nning environment of the destinations. The goal is to improve latency and p=
erformance for 5G EC services.</div>
<div>&nbsp;</div>
<div>In your discussion of this adoption call, please consider these questi=
ons: </div>
<div>&nbsp;</div>
<div>1) The addition of this type of information to tunnels is useful for i=
nter-domain routing within 5G networks? </div>
<div>[Cheng]Yes, it is useful. But I have concern of where to put the infor=
mation.</div>
<div>&nbsp;</div>
<div>2) What type of additional load this data to Basic Tunnel encapsulatio=
n [RFC9012]?&nbsp; </div>
<div>[Cheng]Sorry, I do not really get this question.&nbsp; But it is diffe=
rent with SR policy for sure.</div>
<div>&nbsp;</div>
<div>For example is the load placed by this draft equal or Less than the SR=
 routing additions from such as draft-ietf-idr-segment-routing-te-policy? <=
/div>
<div>&nbsp;</div>
<div>3) Will the addition of this information aid Routing in 5G networks? <=
/div>
<div>[Cheng] it can help in 5G networks.</div>
<div>&nbsp;</div>
<div>&nbsp;</div>
<div>Cheers, Sue Hares </div>
<div>&nbsp;</div>
<div>_______________________________________________</div>
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