[c-nsp] Spanning tree compatibility with RSTP

[Collins, Richard (EXT)]

Thank you all for your responses.

We have a couple of different networks at different locations but the
Cisco 
switches are in the minority as far as the switches go.  Yes Foundry is
one
of the third party which gave us some problems.

I am basically interested in 802.1s interworking with 802.1w and
possibly 802.1d.

I followed a couple of links you suggested and seem to come to the
conclusion that
for our somewhat simple network with only a few vlans I should leave
instance 0 alone and 
assign all the other vlans to instance 1.  I will be keeping PVST or
PVST+ out of the 
network. Currently there is no need to load balance with different
VLAN's over uplinks.

Rich

>Hi Collins,
>
>802.1w can revert back to 802.1D in order to interoperate with legacy
>switches.
>So, if Cisco does not understand the other switch you have it may try
>speak old STP.
>
>But I would recommend creating some loop and debug both switches to be
>confortable they will handle the problem.
>
>Besides creating loop, I would create single wire failure (for example,
>cut wire 3 of UTP cable) to be aware of the behavior.
>
>Good Luck,
>Alaerte
>
>
>
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