why am i in this handbasket? (was Devil's Advocate - Segment Routing, Why?)

Mark Tinka mark.tinka at seacom.mu
Sun Jun 21 09:59:55 UTC 2020


On 20/Jun/20 17:12, Robert Raszuk wrote:

>
> MPLS is not flow driven. I sent some mail about it but perhaps it
> bounced. 
>
> MPLS LDP or L3VPNs was NEVER flow driven. 
>
> Since day one till today it was and still is purely destination based. 
>
> Transport is using LSP to egress PE (dst IP). 
>
> L3VPNs are using either per dst prefix, or per CE or per VRF labels.
> No implementation does anything upon "flow detection" - to prepare any
> nested labels. Even in FIBs all information is preprogrammed in
> hierarchical fashion well before any flow packet arrives.

If you really don't like LDP or RSVP-TE, you can statically assign
labels and manually configure FEC's across your entire backbone. If
trading state for administration is your thing, of course :-).

Mark.
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