[External] Re: [c-nsp] cisco nexus vpc hybrid topology

[Hunter Fuller]

Yes, we were met with this problem and we decided to go with VXLAN EVPN and
rip out all vPC from the core. So far so good.

And I hate vPC, so better for me. :)

On Tue, Feb 23, 2021 at 09:25 Raymond Burkholder <ray at oneunified.net> wrote:

> Why not L3 your network instead?  Use VxLAN for 'interior' core, and vPC
> at the edges.  And migrate away from STP completely?  Build from the
> core outwards.
>
> On 2/23/21 5:29 AM, Marco Regini wrote:
> > Hello,
> >
> >   is anyone heavily using nexus vpc in hybrid topology ?
> >
> > I want to maintain my standard L2 network ( with STP as loop avoidance
> mechanism) with the possibility to configure some vpc  when is possible or
> when is useful.
> > In the vpc documentation STP is evil, connecting switches in daisy-chain
> discouraged but I can't rebuild from scratch all my campus network.
> >
> >
> > Simplifying I have 3 building connected each-over with a couple of
> dark-fiber: a triangle with double edges.
> > In each vertex I'm going to place a couple of Nexus9k.
> >
> > I'm interested in vpc to aggregate the couple of dark-fiber
> interconnecting each building but:
> >
> > - a triangle topology require STP ( I guess)
> > - In each building the existing switches ( Catalyst 3560)  are mostly in
> daisy-chain and  can't be connected to the local couple of nexus via a
> dedicate vpc port.
> >
> >
> > I understand that what I want is not what Cisco suggests,  but I don't
> see any issue of doing that.
> > I simply prefer vpc in hybrid topology that no vpc at all
> >
> >
> > Thanks
> >
> > Marco
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>
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Hunter Fuller (they)
Router Jockey
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