Re: MSTP & PVST+ interoperation

Hi Joe,

The problem is that we have the redundancy over devices, it means that
two different switchs in the MSTP region will be connected to two
different switchs in the PVST domain.

Flex-link might be a nice solution for devices in the access layer.

Thanks for your help,

Viet

On 09/26/2012 07:06 AM, Joe Sanchez wrote:
> Flex-link with bpdu-guard and bpdu-filter on the ports between your STP domains along with the trunks. You can have MSTP in one domain and PvST+ in the other. But this is scary and we would need to see a topology to ensure loops can be avoided.
>
> Regards,
> Joe Sanchez
>
> ( please excuse the brevity of this email as it was sent via a mobile device. Please excuse misspelled words or sentence structure.)
>
> On Sep 25, 2012, at 7:01 PM, Viet-Hung Ton <vton_at_integra.fr> wrote:
>
>> 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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Received on Wed Sep 26 2012 - 12:08:53 ART