Les, Thank you for the clarification.
Rgds Shraddha Juniper Business Use Only From: Les Ginsberg (ginsberg) <ginsberg=40cisco....@dmarc.ietf.org> Sent: Thursday, November 18, 2021 8:36 PM To: Shraddha Hegde <shrad...@juniper.net>; lsr@ietf.org Subject: RE: Clarification on RFC 7794 [External Email. Be cautious of content] Shraddha - In the case you mention (redistribution from another protocol), the advertised router-id would be the ID of the originating router in the source protocol for redistribution. In your example, this ID would come from OSPF. However, the term "router-id" means something different in OSPF. The corresponding identifier would come from the OSPF "Router Address TLV" defined in RFC 3630. I am trying to be precise here. I wasn't certain when you used the term "redistributing router" whether you were referring to the source protocol or the destination protocol for redistribution. Les From: Lsr <lsr-boun...@ietf.org<mailto:lsr-boun...@ietf.org>> On Behalf Of Shraddha Hegde Sent: Thursday, November 18, 2021 12:37 AM To: lsr@ietf.org<mailto:lsr@ietf.org> Subject: [Lsr] Clarification on RFC 7794 WG, I am looking for clarification on below text in RFC 7794 sec 2.2 "Note that the Router ID advertised is always the Router ID of the IS-IS instance that originated the advertisement. This would be true even if the prefix had been learned from another protocol (i.e., with the X-flag set as defined in Section 2.1<https://urldefense.com/v3/__https:/datatracker.ietf.org/doc/html/rfc7794*section-2.1__;Iw!!NEt6yMaO-gk!TsPnm1bOgtMrsa_zhSpVlUmP8Gzlx5OYh6JYnHw9hS2XuHuZx-YXZcsM-Q7O46xQ$>)" If a router is re-distributing a prefix from another ISIS instance it would put the source router-id of the Originating router. If the prefix is being redistributed from another protocol (say OSPF) the source router-id of the Prefix would be set to the router-id of the redistributing router. Is this the correct interpretation? Rgds Shraddha Juniper Business Use Only
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