Devil's Advocate - Segment Routing, Why?

adamv0025 at adamv0025 at
Thu Jun 18 09:49:59 UTC 2020

> From: Saku Ytti
> Sent: Thursday, June 18, 2020 6:26 AM
> On Thu, 18 Jun 2020 at 01:17, Mark Tinka <mark.tinka at> wrote:
> > Yes, we all love less state, I won't argue that. But it's the same question
> that is being asked less and less with each passing year - what scales better in
> 2020, OSPF or IS-IS. That is becoming less relevant as control planes keep
> getting faster and cheaper.
> I don't think it ever was relevant.
In 99% of cases, there are cases however where supporting 1M+ routes in IGP is one of the viable options to consider, or running multi-100k of LSPs through a core node... 
But these are core MPLS networks that have no boundaries cause these literally wrap around the globe, and access to custom code. 

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