Yali - What is missing for me is an explanation of why IFIT Capability information is something that is appropriate to be sent using IGP Router Capability advertisements.
Generally speaking, we prefer to restrict IGP advertisements to information which is of direct use to the protocol. However, it is fair to say that we have relaxed this restriction in some cases e.g.: https://www.iana.org/go/rfc7883 https://www.iana.org/go/rfc8491 However, even in these cases the information advertised is of value to some entity executing on the protocol peers - even if not directly by the IGP itself. I see no such value add here i.e., the IFIT capability information may well be of value to a controller but I do not see any use case for any entity on protocol peers. So why should we use IGPs to send this information to all other IGP peers when none of them can make use of this information? Les From: Lsr <lsr-boun...@ietf.org> On Behalf Of wangyali Sent: Monday, March 09, 2020 1:21 AM To: lsr@ietf.org Subject: [Lsr] A new version of I-D, draft-liu-lsr-isis-ifit-node-capability-02 Dear all, I'm Yali. Following is a new version of I-D, draft-liu-lsr-isis-ifit-node-capability-02 I submitted recently. Please let me know your questions and comments. Thank you. >>>>>>>>> Name: draft-liu-lsr-isis-ifit-node-capability Revision: 02 Title: IS-IS Extensions for Advertising IFIT Node Capability Document date: 2020-03-09 Group: Individual Submission Pages: 7 URL: https://www.ietf.org/internet-drafts/draft-liu-lsr-isis-ifit-node-capability-02.txt Status: https://datatracker.ietf.org/doc/draft-liu-lsr-isis-ifit-node-capability/ Htmlized: https://tools.ietf.org/html/draft-liu-lsr-isis-ifit-node-capability-02 Htmlized: https://datatracker.ietf.org/doc/html/draft-liu-lsr-isis-ifit-node-capability Diff: https://www.ietf.org/rfcdiff?url2=draft-liu-lsr-isis-ifit-node-capability-02 Abstract: This document defines a way for an Intermediate System to Intermediate System (IS-IS) routers to advertise IFIT(in-situ Flow Information Telemetry) capabilities. This document extends a new optional sub-TLV in the IS-IS Router CAPABILITY TLV [RFC7981], which allows a router to announce its IFIT node capabilities within an IS- IS level or the entire routing domain. Such advertisements enable IFIT applications in the network domain. Best Regards, Yali WANG E: wangyal...@huawei.com<mailto:wangyal...@huawei.com>
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