Hi Les, > I see no need for “abstraction at arbitrary boundaries”. Areas work just fine. > IS-IS already has smooth transition capability for merging/splitting areas.
[HC]: The smooth transition capability for merging/splitting areas in IS-IS will not reduce the service interruption while an existing area or zone is being abstracted as a single node because the adjacency ups and downs. > Given both of the points above, I see no value in “smooth transition to/from > zone abstraction”. [HC]: The "smooth transition to/from zone abstraction" will reduce the service interruption while an existing area or zone is being abstracted as a single node and vice versa. Best Regards, Huaimo ________________________________ From: Lsr <[email protected]> on behalf of Les Ginsberg (ginsberg) <[email protected]> Sent: Tuesday, August 18, 2020 5:06 PM To: Acee Lindem (acee) <[email protected]>; [email protected] <[email protected]> Subject: Re: [Lsr] LSR WG Adoption Poll for "IS-IS Topology-Transparent Zone" - draft-chen-isis-ttz-11.txt I see no need for “abstraction at arbitrary boundaries”. Areas work just fine. IS-IS already has smooth transition capability for merging/splitting areas. Given both of the points above, I see no value in “smooth transition to/from zone abstraction”. If these are the principal distinguishing characteristics of TTZ as compared to area proxy (and I would agree they are), then I see no reason why this solution should be pursued as well. I am therefore opposed to WG adoption of TTZ. Les From: Lsr <[email protected]> On Behalf Of Acee Lindem (acee) Sent: Tuesday, August 18, 2020 7:17 AM To: [email protected] Subject: [Lsr] LSR WG Adoption Poll for "IS-IS Topology-Transparent Zone" - draft-chen-isis-ttz-11.txt Based on the discussions in the last meeting and on the mailing list regarding draft-chen-isis-ttz-11, the chairs feel that there are enough differences with draft-ietf-lsr-isis-area-proxy-03 and in the community to consider advancing it independently on the experimental track. These differences include abstraction at arbitrary boundaries and IS-IS extensions for smooth transition to/from zone abstraction. We are now starting an LSR WG adoption call for draft-chen-isis-ttz-11.txt. Please indicate your support or objection to adoption prior to Tuesday, September 2nd, 2020. Thanks, Acee and Chris
_______________________________________________ Lsr mailing list [email protected] https://www.ietf.org/mailman/listinfo/lsr
