[c-nsp] Maximum spannig tree instances

[Phil Mayers]

David Hughes wrote:
> On 15/07/2009, at 8:02 AM, Phil Mayers wrote:
> 
>> R-PVST + manual VLAN management works like a charm here.
> 
> ..... works like a charm until it doesn't.   Any PV based STP will not  
> work in a dense server virtualisation environment.  So these days  

I'm glad it works for you, I really am. But I'm definitely not 
interested in getting into a food fight about which STP protocol is 
"better" ;o)

In all seriousness, both MST and PVST are an appropriate tool for some 
jobs, and not for others. Few of the jobs I've personally come across 
were suited to MST, hence I have a better opinion of PVST, but it's just 
that - an opinion. There's no absolute right or wrong here.

Hopefully the info presented in the thread will help the OP choose which 
is appropriate for them.

The point that lower-end switches have serious instance limitations is a 
good one though - especially (as you later describe) when doing 
top-of-rack switching and hundreds of VLANs.