Hi Tony, Interesting write-up. The proposal seems more operation friendly at first sight as the alternate solutions.
A while ago I was bumping into limitation of advertising a flex-algo FAD, and realized that only one is allowed and more seem to be forbidden by the draft https://datatracker.ietf.org/doc/html/draft-ietf-lsr-flex-algo#section-5.1 The IS-IS FAD Sub-TLV MAY be advertised in an LSP of any number, but a router MUST NOT advertise more than one IS-IS FAD Sub-TLV for a given Flexible-Algorithm. A router receiving multiple IS-IS FAD Sub- TLVs for a given Flexible-Algorithm from the same originator MUST select the first advertisement in the lowest numbered LSP. Is draft-pkaneria-lsr-multi-tlv intending to look TLVs that are explicitly restricted to only a single entry? G/ From: Lsr <[email protected]> On Behalf Of Tony Li Sent: Saturday, January 22, 2022 1:57 AM To: lsr <[email protected]> Subject: [Lsr] Fwd: New Version Notification for draft-pkaneria-lsr-multi-tlv-00.txt Hi all, This draft attempts to codify existing practice. If you run out of space in a TLV, generate another TLV of the same type and continue. Ditto sub-TLVs and sub-sub-TLVs. Comments welcome. T Begin forwarded message: From: [email protected]<mailto:[email protected]> Subject: New Version Notification for draft-pkaneria-lsr-multi-tlv-00.txt Date: January 21, 2022 at 4:55:01 PM PST To: <[email protected]<mailto:[email protected]>>, "Chris Bowers" <[email protected]<mailto:[email protected]>>, "Les Ginsberg" <[email protected]<mailto:[email protected]>>, "Parag Kaneriya" <[email protected]<mailto:[email protected]>>, "Shraddha Hegde" <[email protected]<mailto:[email protected]>>, <[email protected]<mailto:[email protected]>>, "Tony Li" <[email protected]<mailto:[email protected]>>, "Tony Przygienda" <[email protected]<mailto:[email protected]>> A new version of I-D, draft-pkaneria-lsr-multi-tlv-00.txt has been successfully submitted by Tony Li, and posted to the IETF repository. Name: draft-pkaneria-lsr-multi-tlv Revision: 00 Title: Multiple TLV Instances in IS-IS Document date: 2022-01-21 Group: Individual Submission Pages: 7 URL: https://www.ietf.org/archive/id/draft-pkaneria-lsr-multi-tlv-00.txt Status: https://datatracker.ietf.org/doc/draft-pkaneria-lsr-multi-tlv/ Htmlized: https://datatracker.ietf.org/doc/html/draft-pkaneria-lsr-multi-tlv Abstract: Emerging technologies are adding information into IS-IS TLVs at a steady pace while deployment scales are simultaneously increasing. This causes the contents of many critical TLVs to exceed the currently supported limit of 255 octets. Extensions such as [RFC7356] require significant IS-IS changes that could help address the problem, but a less drastic solution would be beneficial. This document codifies the common mechanism of extending the TLV space through multiple TLV instances. The IETF Secretariat
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