[c-nsp] Spanning tree compatibility with RSTP

[nealr]

  Suggest you proceed carefully on this one - I've seen swarms of HP 
switches brought to a screeching halt by prestandard BPDUs coming out of 
WS-C3550, WS-C3750 with hardware level bugs such that they run correctly 
but fail to report their states properly, etc, etc, and I am *not* well 
versed in the protocol - seems like every time I see it the situation 
turns into a big bug hunt.



Collins, Richard (SNL US) wrote:
> Hello,
>
> I have some switches which are to be connected with some third-party
> equipment which runs only classical RSTP.  
>
> What is the recommended procedure - go to mst mode and set all vlans to
> one MST instance and match the timers with the third party RSTP?  Can
> one still run with multiple MST instances?
>
> SUP720(config)#spanning-tree mode ?
>   mst         Multiple spanning tree mode
>   pvst        Per-Vlan spanning tree mode
>   rapid-pvst  Per-Vlan rapid spanning tree mode
>
> Thanks
> Rich
>
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