Hi, I've reviewed the document and have the following comments for the authors to consider.
How about changing the title of the document to "OSPFv2 Anycast Property Advertisement"? 21 Each OSPF prefix is advertised along with an 8-bit field of 22 capabilities, by using the flag flield in the OSPFv2 Extended Prefix 23 TLV, but the definition of anycast flag to identify the IPv4 prefix 24 as anycast has not yet been defined. I don't think we need this in the Abstract. 90 The Flags field of the OSPFv2 Extended Prefix TLV (Section 2.1 of 91 [RFC7684]) has 5 unassigned bits remaining (see "OSPFv2 Extended 92 Prefix TLV Flags" IANA registry [IANA-OSPFv2-EPF]). Suggested text: The flags field of he OSPFv2 Extended Prefix TLV (Section 2.1 of [RFC7684]) can be found in "OSPFv2 Extended Prefix TLV Flags" IANA registry [IANA-OSPFv2-EPF]. 94 This document updates [RFC7684], by defining a new flag in the OSPFv2 95 Extended Prefix TLV Flags [RFC7684] to advertise the anycast property 96 for an IPv4 prefix. This document doesn't update RFC7684. Suggested text: This document defines a new flag in the OSPFv2 Extended Prefix TLV Flags [RFC7684] to advertise the anycast property for an IPv4 prefix. 106 2. Use-case 108 In the absence of the N-flag, the node specific prefixes need to be 109 identified from the anycast prefixs. A prefix that is advertised by 110 a single node and without an AC-flag MUST be considered node 111 specific. The use case needs to be collaborated with more details. Question: "A prefix that is advertised by a single node and without an AC-flag MUST be considered node specific." I don't understand this sentence. Router A supporting what's defined in this document may receive advertisement from Router B which doesn't support AC-flag. Router B will advertise an anycast prefix without AC-flag. What difference will this "MUST" do? nit: AC-flag is used for the first time in the document without any explanation. 113 3. Updates to Anycast Property advertisement for OSPFv2 Please consider: OSPFv2 Anycast Property Advertisement 120 prefix, and it has been defines the below flags(see "OSPFv2 Extended s/it has been defines/it has defined 142 When the prefix is configured as anycast, the AC-Flag SHOULD be set. s/the prefix/a prefix 155 A prefix that is advertised by a single node and without an AC-flag 156 MUST be considered node specific prefix. same question as above. I'm attaching a YANG module and its tree. The module adds the ac-flag definition and configuration of a prefix as anycast. Please let me know if you have any questions. Thanks, Yingzhen On Thu, Aug 14, 2025 at 2:59 AM Acee Lindem <[email protected]> wrote: > LSR WG, > > This begins a 2-week WG last call on draft-ietf-lsr-any-flag-03. Please > indicate your support or objection to this list prior to Friday, August > 29h, 2025. > > Thanks, > Acee > _______________________________________________ > Lsr mailing list -- [email protected] > To unsubscribe send an email to [email protected] >
ietf-ospf-anycast-flag.yang
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ietf-ospf-anycast-flag.tree
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