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Re: [Bier] WGLC: draft-ietf-bier-bgp-ls-bier-ext

"Jeffrey (Zhaohui) Zhang" <zzhang@juniper.net> Fri, 10 December 2021 16:05 UTC

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From: "Jeffrey (Zhaohui) Zhang" <zzhang@juniper.net>
To: "gjshep@gmail.com" <gjshep@gmail.com>, "EXT-zhang.zheng@zte.com.cn" <zhang.zheng@zte.com.cn>, Jeff Haas <jhaas@juniper.net>
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Thread-Topic: [Bier] WGLC: draft-ietf-bier-bgp-ls-bier-ext
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Archived-At: <https://mailarchive.ietf.org/arch/msg/bier/w6IfJNe8s9W_rse8q78pRueA6jQ>
Subject: Re: [Bier] WGLC: draft-ietf-bier-bgp-ls-bier-ext
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I think we could wait on this a little bit, with the following comments:

Other relevant documents like draft-ietf-bier-lsr-ethernet-extensions and draft-ietf-bier-idr-extensions should be progressed first.

For the sub-TLV format like the following:


      0                   1                   2                   3

      0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1

      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

      |              Type             |             Length            |

      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

      |     Max SI    |                   BIFT-id                     |

      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

      |BS Len |                     Reserved                          |

      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+



Jeff will post some comments for the draft-ietf-bier-idr-extensions that apply here as well.

In fact, I wonder if we could use the same sub-TLVs for both draft-ietf-bier-idr-extensions and draft-ietf-bier-bgp-ls-bier-ext.

   When BIER is enabled in an IGP domain, BIER-related informations will
   be advertised via IGP link-state routing protocols.  IGP extensions
   are described in ISIS[[RFC8401<https://datatracker.ietf.org/doc/html/rfc8401>]],OSPFv2[[RFC8444<https://datatracker.ietf.org/doc/html/rfc8444>]] and
   OSPFv3[[I-D.ietf-bier-ospfv3-extensions<https://datatracker.ietf.org/doc/html/draft-ietf-bier-bgp-ls-bier-ext#ref-I-D.ietf-bier-ospfv3-extensions>]].The flooding scope for the
   IGP extensions for BIER is IGP area-wide. by using the IGP alone it
   is not enough to construct fowarding tables across multiple IGP Area.

The above is not true and should be removed. There are inter-area distribution in ISIS/OSPF, and with draft-ietf-bier-prefix-redistribute, it can work with inter-protocol as well.

Jeffrey

------------------原始邮件------------------
发件人：GregShepherd
收件人：BIER WG;
日 期 ：2021年11月23日 00:20
主 题 ：[Bier] WGLC: draft-ietf-bier-bgp-ls-bier-ext
_______________________________________________
BIER mailing list
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https://www.ietf.org/mailman/listinfo/bier<https://urldefense.com/v3/__https:/www.ietf.org/mailman/listinfo/bier__;!!NEt6yMaO-gk!RT25uRm9vChT9Kp5VRphpcIQ9C8GT2KoFyAMQNI7jU3DQoYo5o4s-M8bFA10XaQ0$>

draft-ietf-bier-bgp-ls-bier-ext has been updated, and should go through one more WGLC before we request publication. Please read and review:

https://datatracker.ietf.org/doc/draft-ietf-bier-bgp-ls-bier-ext/<https://urldefense.com/v3/__https:/datatracker.ietf.org/doc/draft-ietf-bier-bgp-ls-bier-ext/__;!!NEt6yMaO-gk!RT25uRm9vChT9Kp5VRphpcIQ9C8GT2KoFyAMQNI7jU3DQoYo5o4s-M8bFCNue7bG$>

Please respond to this thread, reply-all, with or without support.

Thanks,
- Shep
(Chairs)


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