[c-nsp] cisco nexus vpc hybrid topology

[Raymond Burkholder]

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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