[c-nsp] Cisco Nexus as MetroE switch?

[Adam Vitkovsky]

> Marian Durkovic
> Sent: Tuesday, November 03, 2015 11:29 AM
> On Mon, 2 Nov 2015 16:26:00 -0600, Chris Evans wrote
> > I would avoid TRILL going forward IMHO.. Most vendors have abandoned
> > future investment with it.
>
> OK, let’s take Cisco as an example. It indeed seems that their FabricPath
> (proprietary TRILL implementation incompatible with RFC6325) is no longer
> promoted and VXLAN+BGP is the new buzzword. But wait, multiple posters
> mentioned here, that it’s even more complex than MPLS.
> Is the ever-increasing complexity really something that customers want?
>
To me MAC in MAC like FabricPath/Trill is too plug and play without the ability to tweak.
For instance there's no fast failover available (not in the core nor at the edge).
And besides that I don't fancy the idea to build the whole backbone as L2 only, same goes for PBB, and be able to offer only L2 services with no easy way to add other services in the future that's probably why I saw FabricPath only in small L2 domains merely replacing STP which is a perfect fit in my opinion.

VXLAN on the other hand can leverage MoFRR, IP-FRR and with BGP control plane also PIC Edge.
And I don't think it's more complex than EVPN or PBB-EVPN although these can run mLDP which is certainly more lightweight than running multicast in the core.
But once again VXLAN seems like locking your core into providing L2 transport services only.

To me it's like building a Frame-Relay backbone, we've been there and learned it's better to build L3 backbones over which we can build virtual overlays and transport L2/L3/CEoP/SAToP/whatever else future brings right?


adam


        Adam Vitkovsky
        IP Engineer

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