On 11/Jun/20 17:32, David Sinn wrote:
> Respectfully, that is deployment dependent. In a traditional SP topology that
> focuses on large do everything boxes, where the topology is fairly
> point-to-point and you only have a small handful of nodes at a PoP, labels
> can be fast, cheap and easy. Given the lack of ECMP/WECMP, they remain fairly
> efficient within the hardware.
>
> However if you move away from large multi-chip systems, which hide internal
> links which can only be debugged and monitored if you know the the obscure,
> often different ways in which they are partially exposed to the operator, and
> to a system of fixed form-factor, single chip systems, labels fall apart at
> scale with high ECMP.
I'm curious about this statement - have you hit practical ECMP issues
with label switching at scale?
We have ECMP'ed label switch paths with multiple paths for a single FEC
all over the place, and those work fine both on Cisco and Junos (of all
sizes), both for IPv4 and IPv6 FEC's. Have done for years.
Unless I misunderstand your concern.
Mark.
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