Re: [Lsr] Request WG adoption of TTZ
Yanhe Fan <yfan@casa-systems.com> Sun, 12 July 2020 14:32 UTC
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From: Yanhe Fan <yfan@casa-systems.com>
To: Donald Eastlake <d3e3e3@gmail.com>, Huaimo Chen <huaimo.chen@futurewei.com>
CC: "lsr@ietf.org" <lsr@ietf.org>, "lsr-chairs@ietf.org" <lsr-chairs@ietf.org>
Thread-Topic: [Lsr] Request WG adoption of TTZ
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Date: Sun, 12 Jul 2020 14:32:48 +0000
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Subject: Re: [Lsr] Request WG adoption of TTZ
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I support adaption of this IS-IS TTZ draft. It is a useful work to address network scalability. Thanks, Yanhe -----Original Message----- From: Lsr <lsr-bounces@ietf.org> On Behalf Of Donald Eastlake Sent: Friday, July 10, 2020 1:08 PM To: Huaimo Chen <huaimo.chen@futurewei.com> Cc: lsr@ietf.org; lsr-chairs@ietf.org Subject: Re: [Lsr] Request WG adoption of TTZ I support adoption of the IS-IS TTZ draft. It seems more flexible and capable although some editorial/nomenclature improvements in the draft would be good. I will send some more detailed suggestions to the authors. Thanks, Donald =============================== Donald E. Eastlake 3rd +1-508-333-2270 (cell) 2386 Panoramic Circle, Apopka, FL 32703 USA d3e3e3@gmail.com On Thu, Jun 18, 2020 at 11:38 PM Huaimo Chen <huaimo.chen@futurewei.com> wrote: > > Hi Chris and Acee, and everyone, > > > > I would like to request working group adoption of "Topology-Transparent Zone" > > (TTZ for short) https://datatracker.ietf.org/doc/draft-chen-isis-ttz/ . > > > This draft comprises the following solutions for helping to improve scalability: > > 1) abstracting a zone to a single pseudo node in IS-IS, > > 2) abstracting a zone to a single pseudo node in OSPF, > > 3) abstracting a zone to zone edges' full mess in IS-IS, and > > 4) transferring smoothly between a zone and a single pseudo node. > > A zone is a block of an area (IS-IS L2 or L1 area, OSPF backbone > or > > non-backbone area). > > > > When a network area becomes (too) big, we can reduce its size in > the sense > > of its LSDB size through abstracting a zone to a single pseudo node or > > abstracting a few zones to a few pseudo nodes. > > > > While a zone is being abstracted (or transferred) to a single > pseudo node, > > the network is stable. There is no or minimum service interruption. > > > > After abstracting a few zones to a few pseudo nodes, if we want to > reconstruct > > them, we can transfer (or roll) any of the pseudo nodes back to its > zone smoothly > > with no or minimum service interruption. > > > > We had a prototype implementation of abstracting a zone to zone > edges' full > > mess in OSPF. The procedures and related protocol extensions for > transferring > > smoothly from a zone to zone edges' full mess are implemented and tested. > > A zone (block of an OSPF area) is smoothly transferred to its edges’ > full mess > > without any routing disruptions. The routes on every router are stable > while > > the zone is being transferred to its edges' mess. It is very easy to > operate > > the transferring. > > > > There are two other drafts for improving scalability: "Area Proxy for IS-IS" > > (Area Proxy for short) and "IS-IS Flood Reflection" (Flood Reflection for short). > > > > "Area Proxy" > https://tools.ietf.org/html/draft-li-lsr-isis-area-proxy-03 > > abstracts an existing IS-IS L1 area to a single pseudo node. > > > > "Flood Reflection" > https://tools.ietf.org/html/draft-przygienda-lsr-flood-reflection-01 > > abstracts an existing IS-IS L1 area to its edges' connections via one > or more > > flood reflectors. > > > > We believe that TTZ has some special advantages even though > > Area Proxy and Flood Reflection are very worthy. We would like > > to ask for working group adoption of TTZ. > > > > Best Regards, > > Huaimo > > _______________________________________________ > Lsr mailing list > Lsr@ietf.org > https://www.ietf.org/mailman/listinfo/lsr _______________________________________________ Lsr mailing list Lsr@ietf.org https://www.ietf.org/mailman/listinfo/lsr
- [Lsr] Request WG adoption of TTZ Huaimo Chen
- Re: [Lsr] Request WG adoption of TTZ Christian Hopps
- Re: [Lsr] Request WG adoption of TTZ Huaimo Chen
- Re: [Lsr] Request WG adoption of TTZ Les Ginsberg (ginsberg)
- Re: [Lsr] Request WG adoption of TTZ Huaimo Chen
- Re: [Lsr] Request WG adoption of TTZ Christian Hopps
- Re: [Lsr] Request WG adoption of TTZ tony.li
- Re: [Lsr] Request WG adoption of TTZ Les Ginsberg (ginsberg)
- Re: [Lsr] Request WG adoption of TTZ Acee Lindem (acee)
- Re: [Lsr] Request WG adoption of TTZ Huaimo Chen
- Re: [Lsr] Request WG adoption of TTZ Acee Lindem (acee)
- Re: [Lsr] Request WG adoption of TTZ Huaimo Chen
- Re: [Lsr] Request WG adoption of TTZ Les Ginsberg (ginsberg)
- Re: [Lsr] Request WG adoption of TTZ Tony Li
- Re: [Lsr] Request WG adoption of TTZ Christian Hopps
- Re: [Lsr] Request WG adoption of TTZ Huaimo Chen
- Re: [Lsr] Request WG adoption of TTZ Huaimo Chen
- Re: [Lsr] Request WG adoption of TTZ Aijun Wang
- Re: [Lsr] Request WG adoption of TTZ tony.li
- Re: [Lsr] Request WG adoption of TTZ Huaimo Chen
- Re: [Lsr] Request WG adoption of TTZ Acee Lindem (acee)
- Re: [Lsr] Request WG adoption of TTZ Acee Lindem (acee)
- Re: [Lsr] Request WG adoption of TTZ Huaimo Chen
- Re: [Lsr] Request WG adoption of TTZ Donald Eastlake
- Re: [Lsr] Request WG adoption of TTZ LEI LIU
- Re: [Lsr] Request WG adoption of TTZ Linda Dunbar
- Re: [Lsr] Request WG adoption of TTZ Haoyu Song
- Re: [Lsr] Request WG adoption of TTZ Uma Chunduri
- Re: [Lsr] Request WG adoption of TTZ Christian Hopps
- Re: [Lsr] Request WG adoption of TTZ Christian Hopps
- Re: [Lsr] Request WG adoption of TTZ Anil Kumar
- Re: [Lsr] Request WG adoption of TTZ Liu Vic
- Re: [Lsr] Request WG adoption of TTZ Yanhe Fan
- Re: [Lsr] Request WG adoption of TTZ Toy, Mehmet
- Re: [Lsr] Request WG adoption of TTZ reta Yang
- Re: [Lsr] Request WG adoption of TTZ ruoxin huang
- Re: [Lsr] Request WG adoption of TTZ Kiran Makhijani
- Re: [Lsr] Request WG adoption of TTZ Huaimo Chen
- Re: [Lsr] Request WG adoption of TTZ Tony Li
- Re: [Lsr] Request WG adoption of TTZ Huaimo Chen
- Re: [Lsr] Request WG adoption of TTZ Tony Li
- Re: [Lsr] Request WG adoption of TTZ Linda Dunbar
- Re: [Lsr] Request WG adoption of TTZ Acee Lindem (acee)
- Re: [Lsr] Request WG adoption of TTZ Linda Dunbar
- Re: [Lsr] Request WG adoption of TTZ Acee Lindem (acee)
- Re: [Lsr] Request WG adoption of TTZ Linda Dunbar
- Re: [Lsr] Request WG adoption of TTZ Acee Lindem (acee)
- Re: [Lsr] Request WG adoption of TTZ Henk Smit
- Re: [Lsr] Request WG adoption of TTZ John E Drake
- Re: [Lsr] Request WG adoption of TTZ Les Ginsberg (ginsberg)
- Re: [Lsr] Request WG adoption of TTZ Uma Chunduri
- Re: [Lsr] Request WG adoption of TTZ Richard Li
- Re: [Lsr] Request WG adoption of TTZ Uma Chunduri
- Re: [Lsr] Request WG adoption of TTZ Acee Lindem (acee)
- Re: [Lsr] Request WG adoption of TTZ Uma Chunduri
- Re: [Lsr] Request WG adoption of TTZ Tianran Zhou
- Re: [Lsr] Request WG adoption of TTZ Henk Smit
- Re: [Lsr] Request WG adoption of TTZ Tianran Zhou
- Re: [Lsr] Request WG adoption of TTZ Christian Hopps
- Re: [Lsr] Request WG adoption of TTZ Huaimo Chen
- Re: [Lsr] Request WG adoption of TTZ Les Ginsberg (ginsberg)
- Re: [Lsr] Request WG adoption of TTZ Tianran Zhou
- Re: [Lsr] Request WG adoption of TTZ Christian Hopps
- Re: [Lsr] Request WG adoption of TTZ Huaimo Chen
- Re: [Lsr] Request WG adoption of TTZ tony.li