[c-nsp] Divide large PVST domain?

[Victor Sudakov]

Raymond Burkholder wrote:
> > > I have a train of about 20 C3560X switches connected successively.
> > > I know such a diameter is not good for STP, however, when I place the
> > > root bridge in the middle of the train, PVST still works more or
> > > less reliably.
> > >
> 
> Or turn on some simple routing like rip, and make each switch a layer 3
> subnet.  Layer 3 segmentation can be more reliable than layer 2
> segmentation.

In places where I need L3, I have routers connected to those C3560X
switches, or VRFs with "no switchport" interfaces. 

But generally there are about 2 dozen VLANs which are more convenient
on L2.

-- 
Victor Sudakov,  VAS4-RIPE, VAS47-RIPN
sip:sudakov at sibptus.tomsk.ru