Re: [Idr] Part 2 of CAR/CT Adoption call (7/6 to 7/20) - Adoption of draft-dskc-bess-bgp-car-05.txt and draft-kaliraj-idr-bgp-classful-transport-planes-17.txt

[James Guichard <[e-mail]>]

Hi Sue,

Please see inline.

From: Susan Hares <[e-mail]>
Sent: Friday, July 15, 2022 12:02 PM
To: James Guichard <[e-mail]>; [e-mail]
Subject: RE: [Idr] Part 2 of CAR/CT Adoption call (7/6 to 7/20) - Adoption of draft-dskc-bess-bgp-car-05.txt and draft-kaliraj-idr-bgp-classful-transport-planes-17.txt

Jim:
Thanks for letting us know you support the CAR work (as a co-author).
Would you find answering these questions as well:
Jeff Haas (IDR Co-chair) posted a summary on March 21, 2022 that for
route resolution and route origination/propagation, BGP-CAR and BGP-CT are functionally identical,
but operationally different.
    ( https://mailarchive.ietf.org/arch/msg/idr/e69NRd9i2aG0WUxFkShEfQHZsHo/<https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fmailarchive.ietf.org%2Farch%2Fmsg%2Fidr%2Fe69NRd9i2aG0WUxFkShEfQHZsHo%2F&data=05%7C01%7Cjames.n.guichard%40futurewei.com%7C6d73ca3ce0a44c12838e08da667b7022%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C1%7C637934977822092530%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=k8KffhtO1Hd20QkzsScUVgNFecBZ1Q4ScQe3k6HEpXc%3D&reserved=0>

  1.  Do you agree or disagree that these two drafts are functionally identical?
Jim> Yes, I agree with this assessment.

  1.  If you agree, should we have just one draft or do the operational difference encourage us to have two drafts?
Jim> This is the key question. While both solutions are functionally equivalent, operational differences are important from a deployment perspective. It is my belief that BGP CAR fits the deployment models I have seen (hence I am a co-author) and from a complexity standpoint is a better fit in those environments. Having said this there have been several examples in the past of having two solutions to solve the same problem although that is not my personal preference and I would therefore prefer to see only one draft adopted.

  1.  If you disagree, do the functional differences encourage us to have one or two drafts adopted?
Cheers, Sue
From: James Guichard <[e-mail]<mailto:[e-mail]>>
Sent: Friday, July 15, 2022 11:52 AM
To: Susan Hares <[e-mail]<mailto:[e-mail]>>; [e-mail]<mailto:[e-mail]>
Subject: RE: [Idr] Part 2 of CAR/CT Adoption call (7/6 to 7/20) - Adoption of draft-dskc-bess-bgp-car-05.txt and draft-kaliraj-idr-bgp-classful-transport-planes-17.txt


Dear WG,

As a co-author I support adoption of draft-dskc-bess-bgp-car.

BGP CAR as far as I can tell is consistent with existing SR-Policy solutions with direct leverage of Color Extended community for automated steering. CT, on the other hand, requires additional mapping. That leads to unneeded complexity.

Thanks!
Jim

From: Idr <[e-mail]<mailto:[e-mail]>> On Behalf Of Susan Hares
Sent: Wednesday, July 6, 2022 2:17 PM
To: [e-mail]<mailto:[e-mail]>
Subject: [Idr] Part 2 of CAR/CT Adoption call (7/6 to 7/20) - Adoption of draft-dskc-bess-bgp-car-05.txt and draft-kaliraj-idr-bgp-classful-transport-planes-17.txt

This begins a 2-week WG Adoption call (7/6/2022 to 7/20/2022) for the following drafts:

  *   draft-dskc-bess-bgp-car-05.txt

(https://datatracker.ietf.org/doc/draft-dskc-bess-bgp-car/<https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdatatracker.ietf.org%2Fdoc%2Fdraft-dskc-bess-bgp-car%2F&data=05%7C01%7Cjames.n.guichard%40futurewei.com%7C6d73ca3ce0a44c12838e08da667b7022%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C1%7C637934977822092530%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=HUJFJiA1tJdhPNda7QoaWnBd5Uo2cQvIVOrHT8wAuTY%3D&reserved=0>)

  *   draft-kaliraj-idr-bgp-classful-transport-planes-17.txt

(https://datatracker.ietf.org/doc/draft-kaliraj-idr-bgp-classful-transport-planes/<https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdatatracker.ietf.org%2Fdoc%2Fdraft-kaliraj-idr-bgp-classful-transport-planes%2F&data=05%7C01%7Cjames.n.guichard%40futurewei.com%7C6d73ca3ce0a44c12838e08da667b7022%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C1%7C637934977822092530%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=WY94lENT02dpSKU%2BQlQuNQx6d18mPFHqes0JJzhXpYE%3D&reserved=0>)
The associated drafts may be useful in your consideration.
CAR:

  *   draft-ietf-spring-segment-routing-policy-22

https://datatracker.ietf.org/doc/<https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdatatracker.ietf.org%2Fdoc%2F&data=05%7C01%7Cjames.n.guichard%40futurewei.com%7C6d73ca3ce0a44c12838e08da667b7022%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C1%7C637934977822092530%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=pk1jsVlfjzPafeeKOJEPcJIKdF7flEwPrsa%2FAI1zO2Y%3D&reserved=0> draft-ietf-spring-segment-routing-policy/



  *   draft-ietf-idr-segment-routing-te-policy-18

https://datatracker.ietf.org/doc/<https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdatatracker.ietf.org%2Fdoc%2F&data=05%7C01%7Cjames.n.guichard%40futurewei.com%7C6d73ca3ce0a44c12838e08da667b7022%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C1%7C637934977822092530%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=pk1jsVlfjzPafeeKOJEPcJIKdF7flEwPrsa%2FAI1zO2Y%3D&reserved=0> draft-ietf-idr-segment-routing-te-policy/



  *   draft-dskc-bess-bgp-car-problem-statement-05.txt

https://datatracker.ietf.org/doc/draft-dskc-bess-bgp-car-problem-statement/<https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdatatracker.ietf.org%2Fdoc%2Fdraft-dskc-bess-bgp-car-problem-statement%2F&data=05%7C01%7Cjames.n.guichard%40futurewei.com%7C6d73ca3ce0a44c12838e08da667b7022%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C1%7C637934977822092530%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=o76%2FWCLiW08C%2F%2Fcm9k5aL9S2SywFsZMXx8e72jq8Bqg%3D&reserved=0>
CT

  *   draft-hegde-spring-mpls-seamless-sr-06.txt

https://datatracker.ietf.org/doc/draft-hegde-spring-mpls-seamless-sr/<https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdatatracker.ietf.org%2Fdoc%2Fdraft-hegde-spring-mpls-seamless-sr%2F&data=05%7C01%7Cjames.n.guichard%40futurewei.com%7C6d73ca3ce0a44c12838e08da667b7022%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C1%7C637934977822092530%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=DNh5GDhLIOY3SMR%2FoB%2By%2Bz1TOtvSiJlgdih8RtB5LPU%3D&reserved=0>



  *   draft-kaliraj-idr-multinexthop-attribute-02.txt

(https://datatracker.ietf.org/doc/draft-kaliraj-idr-multinexthop-attribute/<https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdatatracker.ietf.org%2Fdoc%2Fdraft-kaliraj-idr-multinexthop-attribute%2F&data=05%7C01%7Cjames.n.guichard%40futurewei.com%7C6d73ca3ce0a44c12838e08da667b7022%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C1%7C637934977822092530%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=ZjY%2BtIgdhMhRjvbSKLCFZFl4KO%2Fof5zxoNBYoVGcSbQ%3D&reserved=0>)



  *   draft-kaliraj-bess-bgp-sig-private-mpls-labels-04

(https://datatracker.ietf.org/doc/draft-kaliraj-bess-bgp-sig-private-mpls-labels/<https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdatatracker.ietf.org%2Fdoc%2Fdraft-kaliraj-bess-bgp-sig-private-mpls-labels%2F&data=05%7C01%7Cjames.n.guichard%40futurewei.com%7C6d73ca3ce0a44c12838e08da667b7022%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C1%7C637934977822092530%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=NhUGS7uYqrA84tx8kSFesMycqsWXYo2wKosen6M8OhM%3D&reserved=0>)


You may discuss adoption of one or both the main drafts (CAR or Classful-Transport (CT)) in your response, and the associate drafts.
A few caveats on your discussion:

  1.  Please do not worry whether the drafts belong in BESS or IDR.

Both BESS and IDR work on creating relevant quality standards in BGP,

and the chairs will work this out.



  1.  The IDR has spent time over 2020-2022 discussing these drafts.

For background information, see the following links below.

You can refer to these previous presentations or email discussions in your responses.



  1.  Please constrain your discussion to whether these drafts should be adopted.

I've started another email thread on whether path establishment/distribution

for a color (aka QOS/SLA/Transport Class) should be done via a

specific BGP route (i.e., per-color NLRI) rather than as per-color attributes on a route.
https://mailarchive.ietf.org/arch/msg/idr/FhoK04HsSy9tR7ioV7AD0Vv6Ir4/<https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fmailarchive.ietf.org%2Farch%2Fmsg%2Fidr%2FFhoK04HsSy9tR7ioV7AD0Vv6Ir4%2F&data=05%7C01%7Cjames.n.guichard%40futurewei.com%7C6d73ca3ce0a44c12838e08da667b7022%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C1%7C637934977822092530%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=%2Fem4FW1iYwLDHN1q6SQVgsv6l%2F0LHBEct7ogHWIu8qk%3D&reserved=0>

Questions (to consider) for these drafts:
Jeff Haas (IDR Co-chair) posted a summary on March 21, 2022 that for
route resolution and route origination/propagation, BGP-CAR and BGP-CT are functionally identical,
but operationally different.
    ( https://mailarchive.ietf.org/arch/msg/idr/e69NRd9i2aG0WUxFkShEfQHZsHo/<https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fmailarchive.ietf.org%2Farch%2Fmsg%2Fidr%2Fe69NRd9i2aG0WUxFkShEfQHZsHo%2F&data=05%7C01%7Cjames.n.guichard%40futurewei.com%7C6d73ca3ce0a44c12838e08da667b7022%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C1%7C637934977822248766%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=I5n8fdQxeo%2BdwV4C%2Blu4ZeDYEKzh560hIw%2Finpo%2FKEY%3D&reserved=0>

  1.  Do you agree or disagree that these two drafts are functionally identical?
  2.  If you agree, should we have just one draft or do the operational difference encourage us to have two drafts?
  3.  If you disagree, do the functional differences encourage us to have one or two drafts adopted?