Hi, Thank you for publishing this document.
I have few comments about it. #1 - While you are defining IGP extensions I think this document still belongs in BESS WG not in LSR WG. #2 - Injecting IPv4 sites to your IPv6 only IGP is IMO a terrible idea. BGP overlays are used to keep core IGPs stable and lean. Networks which do not want to run BGP in the core just use dual stack. #3 However I do see value of general idea as expressed in this draft but only for deployment scenario where you DO NOT inject prefixes from sites to your IGP core and you use CSC (carrier's carrier) approach - still no BGP in IPv6 core. That means IPv4 sites exchange IPv4 reachability over the top and encapsulate packets to the other edge of IPv4 islands. So for #3 I would in fact state that this is not a bad idea. But not for #2 as currently written. Many thx, Robert. On Thu, Jul 14, 2022 at 1:58 PM Chenmengxiao <chen.mengx...@h3c.com> wrote: > Hi WG, > > We posted a new draft: draft-lin-lsr-srv6-service-sid-00. It's about > advertising SRv6 service SID in IGP. > > For the IPv6 backbone networks not deploying BGP, for example, the campus > network using IS-IS or OSPFv3, there may be requirements to interconnect > IPv4 islands. SRv6 Service SIDs like End.DT4 may be used to realize such > requirements. Similar with the BGP based L3 Service over SRv6, SRv6 Service > SIDs like End.DT4 may be used to realize such requirements. This document > extends IS-IS and OSPFv3 to advertise SRv6 Service SIDs along with > prefixes. The receiving router creates forwarding entries associated with > SID. > In the IPv4 over IPv6 scenario, the IPv4 packets will be encapsulated in > an outer IPv6 header with the destination address of SRv6 Service SID and > forwarded according to the SID. When they are forwarded to the destination, > the SID's owner decapsulates the outer IPv6 header and performs IPv4 table > lookup to forward the inner IPv4 packet. Furthermore, it may be extended to > support SRv6-TE Services in IGP. > > Any questions or comments are welcomed. > > Thanks, > Mengxiao Chen > > -----Original Message----- > From: internet-dra...@ietf.org <internet-dra...@ietf.org> > Sent: Monday, July 11, 2022 4:38 PM > To: linchangwang (RD) <linchangwang.04...@h3c.com>; lihao (02566, RD) < > li...@h3c.com>; chenmengxiao (RD) <chen.mengx...@h3c.com> > Subject: New Version Notification for draft-lin-lsr-srv6-service-sid-00.txt > > > A new version of I-D, draft-lin-lsr-srv6-service-sid-00.txt > has been successfully submitted by Mengxiao Chen and posted to the IETF > repository. > > Name:draft-lin-lsr-srv6-service-sid > Revision:00 > Title:IS-IS and OSPFv3 Extensions to Advertise SRv6 Service SID > Document date:2022-07-11 > Group:Individual Submission > Pages:9 > URL: > https://www.ietf.org/archive/id/draft-lin-lsr-srv6-service-sid-00.txt > Status: > https://datatracker.ietf.org/doc/draft-lin-lsr-srv6-service-sid/ > Htmlized: > https://datatracker.ietf.org/doc/html/draft-lin-lsr-srv6-service-sid > > > Abstract: > The IPv6 backbone networks only deploying IGP may be required to > interconnect IPv4 islands. SRv6 Service SIDs like End.DT4 may be > used to realize such requirements. This document extends IS-IS and > OSPFv3 to advertise SRv6 Service SIDs. > > > > > The IETF Secretariat > > > > ------------------------------------------------------------------------------------------------------------------------------------- > 本邮件及其附件含有新华三集团的保密信息，仅限于发送给上面地址中列出 > 的个人或群组。禁止任何其他人以任何形式使用（包括但不限于全部或部分地泄露、复制、 > 或散发）本邮件中的信息。如果您错收了本邮件，请您立即电话或邮件通知发件人并删除本 > 邮件！ > This e-mail and its attachments contain confidential information from New > H3C, which is > intended only for the person or entity whose address is listed above. Any > use of the > information contained herein in any way (including, but not limited to, > total or partial > disclosure, reproduction, or dissemination) by persons other than the > intended > recipient(s) is prohibited. If you receive this e-mail in error, please > notify the sender > by phone or email immediately and delete it! > _______________________________________________ > Lsr mailing list > Lsr@ietf.org > https://www.ietf.org/mailman/listinfo/lsr >
_______________________________________________ Lsr mailing list Lsr@ietf.org https://www.ietf.org/mailman/listinfo/lsr
