Hi Authors, I reviewed the document and have a couple of questions.
In section 4.1, the description about Figure 5 doesn't seem to be right. " For example in the network shown in Figure 5, link D-F is advertised with LSLinkInfinity(65535/0xffff). Router A supports LSLinkInfinity as unreachable, but router B does not. Router A considers link D-F as reachable, and the shortest path to F is A->B->D->F. Router B considers link D-F as unreachable, and the shortest path to F is B->A->C->E->F. As a result, A forwards the packets to B, but B returns them to A, which results in a routing loop. " It seems to me that it should be router A which doesn't support LSLinkInfinity, while router B does. Please correct me if I'm wrong. In section 4.2; " When an OSPFv2 router supports [RFC6987] and the Unreachable Link support capability defined in this document, it MUST also support [RFC8770]. " Why RFC 8770 MUST be supported? Also to my understanding, the enablement of unreachable link is only needed in the base OSPF topology, correct? Attached are the YANG module and tree for you to include in the draft. Please let me know if you need any other info. Thanks, Yingzhen
ietf-ospf-link-unreachable.yang
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ietf-ospf-link-unreachable.tree
Description: Binary data
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