Re: MSTP & PVST+ interoperation

Why do you say "the MST region wants to have the Root Bridge inside" ?
As you say you control the MST area, this "wants" relates to which
entity ? MST has internal regional root and "global" root bridges.

AFAIK, cisco's MST implementation knows how to merge into a PVST area.
And that is reflected by the "Bound(PVST)" label (region boundary, PVST).

Are your areas multiply connected ?

-Carlos

Viet-Hung Ton @ 25/09/2012 21:01 -0300 dixit:
> Hi,
>
> I have a region of MSTP that must communicate with a zone of PVST. Because of historical reason, I must leave the Root bridge in the PVST+ zone, but in theory, the MSTP region want to have the Root Bridge inside, that's why interfaces of routers in this region are in the unfunctional state when doing a "show spanning-tree":
>
> Root BKN* 20000 128.1 P2p Bound(PVST) *PVST
>
> Do you have any ideas how to resolve this problem considering that I can just change the configuration in the MSTP zone but not to PVST zones?
>
> Is there any things of Cisco like Topology-group with the Master Vlan of Brocade, where we can take a Vlan in mode PVST and mapping all others Vlans to this Vlan (only one instance of PVST)?
>
> Thanks for your help,
>
> Viet
>
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-- 
Carlos G Mendioroz  <tron_at_huapi.ba.ar>  LW7 EQI  Argentina
Blogs and organic groups at http://www.ccie.net