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Re: [Lsr] Comments on draft-ymbk-lsvr-lsoe-00

Donald Eastlake <d3e3e3@gmail.com> Mon, 26 March 2018 02:09 UTC

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From: Donald Eastlake <d3e3e3@gmail.com>
Date: Sun, 25 Mar 2018 22:09:15 -0400
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Subject: Re: [Lsr] Comments on draft-ymbk-lsvr-lsoe-00
To: Randy Bush <randy@psg.com>, lsr@ietf.org
Cc: RTGWG <rtgwg@ietf.org>, Keyur Patel <keyur@arrcus.com>, Robert Raszuk <robert@raszuk.net>
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Hi,

On Sat, Mar 24, 2018 at 6:57 AM, Robert Raszuk <robert@raszuk.net> wrote:
> Dear Authors,
>
> Let me just ask one little question ....
>
> It seems that ISIS protocol already meets a "Link State Over Ethernet"
> definition so why to invent anything new here ?

My thought also.

> If you don't like flooding properties of ISIS just disable it. Do not flood.
> Do not run SPF in ISIS.. Use ISIS only for p2p discovery.

IS-IS now explicitly supports link-scoped "flooding" as per RFC 7356
"IS-IS Flooding Scope Link State PDUs (LSPs)". It also support 16-bit
TLV lengths. See in particular Extended Level 1 Circuit Scope (E-L1CS)
in RFC 7356.

> You get for free out of the box all what you are trying to describe in the
> subject document. Integrating open source ISIS code just for discovery (ie.
> not worring about optimizations of flooding, back-off, timers, spf etc ...)
> will be IMO much faster even using any apache license existing
> implementation of ISIS.

And authentication (RFC 5310).

Thanks,
Donald
=============================
 Donald E. Eastlake 3rd   +1-508-333-2270 (cell)
 155 Beaver Street, Milford, MA 01757 USA
 d3e3e3@gmail.com

> Last - as Toerless already indicated - solving inevitable inconsistencies of
> running LSOE, CDP & LLDP between various devices or in parallel on the same
> links is something that should be addressed from day one. Unless you assume
> that if someone is to use LSVR is will also have LSOE and any other
> alternative discovery mechanisms will be disabled.
>
> Best,
> RR.
>
>
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