[c-nsp] Maximum spannig tree instances

[Benny Amorsen]

David Hughes <David at hughes.com.au> writes:

> ..... works like a charm until it doesn't.   Any PV based STP will not
> work in a dense server virtualisation environment.  So these days
> that's basically any hosting provider.  MST is your only choice and if
> you pre-provision your vlan/instance mappings it works fine.  Been
> running it without a single issue for ages.

The other option is to do dot1q tunneling, so the switches have no idea
which traffic they're carrying. It makes configurations a lot simpler,
but obviously gives less control over which VLAN's are available on
which ports.

Getting *STP right in a q-in-q environment is not without its own
challenges of course.


/Benny