On 18/Jun/20 02:32, Phil Bedard wrote:
> I look at the basic SR via IGP extensions like VPLS vs. EVPN. If we had a
> way to go back in history I'm not sure anyone would have said VPLS was a good
> idea vs. EVPN.
>
> There were reasons back in the day why something like SR wasn't done. The
> thought of global MPLS labels scared people and source routing was also evil.
> So LDP was created to distribute labels hop by hop, while still relying 100%
> on the IGP to do so. It kind of defies common sense when you look at it now,
> but there were supposedly good reasons for it back then.
>
> SR-MPLS on an existing device supporting MPLS forwarding is a control-plane
> change, meaning almost any device could support SR-MPLS.
>
> SR is meant to be data plane agnostic, the SID is just an identifier. Most
> support MPLS, some support IPv6.
Fair enough.
There's still a whole IGP mess to sort out though, not to mention many
years of field experience to bake in.
Mark.
