nanog mailing list archives

RE: [c-nsp] LDPv6 Census Check


From: <adamv0025 () netconsultings com>
Date: Thu, 11 Jun 2020 21:44:26 +0100

From: David Sinn
Sent: Thursday, June 11, 2020 4:32 PM

However if you move away from large multi-chip systems, 
to a system of fixed form-factor, single chip systems, labels fall
apart at scale with high ECMP. Needing to enumerate every possible path
within the network or having to have a super-deep label stack removes all
of
the perceived benefits of cheap and simple. 

Looks like the deployments you describe are large DC Clos/Benes fabric, then
the potentially deep label imposition would be done by the VMs right?
On transit nodes the 64x ECMP or super-deep labels is no problem for
NPU/lookup process as it's always just top label lookup and resolving to a
single egress interface.

adam 


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