Hi, Thanks for addressing my comments and including the YANG model.
Here are more comments for the latest version: 2 LSR Working Group L. Gong 3 Internet-Draft W. Cheng 4 Updates: 6987, 8870 (if approved) China Mobile This should be 8770, not 8870. 94 This document proposes a mechanism to advertise infinity links in 95 OSPF. This document specifies using LSLinkInfinity(oxffff) to advertise an OSPF link as unreachable. Section 2 needs some editorial work. For example: 109 A network topology is shown in Figure 1. There is a link available 110 for Traffic Engineering between Node A and E. If this link is used 111 for SPF calculations, best-effort traffic will be routed on the link. Suggested text: A network topology is shown in Figure 1. There is a link available for Traffic Engineering only between Node A and E. If this link is included in the SPF calculations, best-effort traffic may be routed over the link. I'd suggest merging Section 3 with Section 4.1 or updating Section 3, especially section 3 is not including the requirement that all routers within an area need to advertise the capability. >From section 4.1: " 237 OSPF Routers MUST NOT treat links with an advertised metric of 238 LSLinkInfinity as unreachable unless all routers in the OSPF area 239 have advertised this capability. " 223 To provide backward compatibility, this document defines that routers 224 supporting LSLinkInfinity for unreachable links MUST advertise a 225 Router Information (RI) LSA advertisement of a Router Functional 226 Capabilities TLV [RFC7770] including the following Router Functional 227 Capability Bit: MUST advertise a Router Information (RI) LSA advertisement of a Router Functional Capabilities TLV -> MUST advertise a Router Information (RI) LSA with a Router Functional Capabilities TLV Thanks, Yingzhen On Wed, Aug 20, 2025 at 9:55 AM <[email protected]> wrote: > Internet-Draft draft-ietf-lsr-ospf-ls-link-infinity-06.txt is now > available. > It is a work item of the Link State Routing (LSR) WG of the IETF. > > Title: Advertising Unreachable Links in OSPF > Authors: Liyan Gong > Weiqiang Cheng > Changwang Lin > Acee Lindem > Ran Chen > Name: draft-ietf-lsr-ospf-ls-link-infinity-06.txt > Pages: 17 > Dates: 2025-08-20 > > Abstract: > > In certain scenarios, it is necessary to advertise unreachable links > in OSPF, which should be explicitly excluded from the related SPF > calculation. This document specifies using LSLinkInfinity(0xffff) to > advertise an OSPF link as unreachable. > > Stub Router Advertisement (RFC 6987) defines MaxLinkMetric (0xffff) > to indicate a router-LSA link should not be used for transit traffic. > This document updates RFC 6987 and RFC 8770. When an OSPFv2 router > supports the Unreachable Link support capability defined in this > document, the OSPFv2 stub router MaxLinkMetric(0xffff) MUST be > updated to MaxReachableLinkMetric(0xfffe). > > The IETF datatracker status page for this Internet-Draft is: > https://datatracker.ietf.org/doc/draft-ietf-lsr-ospf-ls-link-infinity/ > > There is also an HTML version available at: > > https://www.ietf.org/archive/id/draft-ietf-lsr-ospf-ls-link-infinity-06.html > > A diff from the previous version is available at: > > https://author-tools.ietf.org/iddiff?url2=draft-ietf-lsr-ospf-ls-link-infinity-06 > > Internet-Drafts are also available by rsync at: > rsync.ietf.org::internet-drafts > > > _______________________________________________ > Lsr mailing list -- [email protected] > To unsubscribe send an email to [email protected] >
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