[c-nsp] PVST Instances on 2970

[David J. Hughes]

I just jumped onto a random WS-C2970G-24T-E in our datacentre and found 
14 live STP instances so the 4 instance limit isn't correct.  A closer 
look at the link you provide appears to show that the document is for 
2940's not 2970's.  A quick search of the page for '2970' doesn't get a 
single hit.  All hits for "29*" show 2940.  In fact the first sentence 
reads

"This chapter describes how to configure the Spanning Tree Protocol 
(STP) on port-based VLANs on your Catalyst 2940 switch."



David
...


On 22/04/2005, at 12:52 AM, Sascha E. Pollok wrote:

> Folks,
>
> on Cisco.com http://tinyurl.com/e4leb I read, that
> the Cat2970 supports up to 4 PVST+ instances. This
> number seems kinda low to me. I mean, Cat2950
> supports up to 64 instances, so does e.g. 3500XL.
> When I log on to a 2970 and do a "sh spann summary"
> it shows ~40 VLANs that I have configured. Looks
> like PVST+ is running for all of these VLANs.
>
> Anyone?
>
> Thanks
> Sascha
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