[c-nsp] backup with STP

[David J. Hughes]

RPVST+ offers full support for legacy devices by stepping back to 
"traditional" spanning tree if the device doesn't respond to Rapid 
BPDUs.


David
...

On 28/09/2005, at 11:03 PM, Maxim Tuliuk wrote:

> I don't need stp instance per vlan, I need compatibily with old dot1q
> switch that support the simplest stp (802.1d) - it get two links (with
> group of dot1q vlans) and will switch on these ports using stp.
> Does mst be compatible with old stp implementation?
>
> On Wed, Sep 28, 2005 at 21:43 +1000, David J. Hughes wrote:
>>
>> The only words I would say about MST are - DON'T GO THERE.
>>
>> If your environment is capable of running Rapid PVST then it is
>> certainly what you want to be running.  RPVST+ extends the PVST+ that
>> you know and love to include rapid response to topology changes.  MST
>> gives you a totally different set of semantics (and issues/problems) 
>> to
>> get your head around.  Remember you no longer have an STP instance per
>> vlan.  The interaction with anything in your network that doesn't 
>> speak
>> MST can be troublesome and "interesting" to say the least.  RPVST+ is
>> the end-game and MST was a bump in the road on the way.
>>
>>
>> David
>> ...
>>
>>
>> On 28/09/2005, at 9:11 PM, Maxim Tuliuk wrote:
>>
>>> ok
>>> could you say some words about mstp? is it better or worse than
>>> rapid-pvst?
>>>
>>> On Tue, Sep 27, 2005 at  7:40 -0400, Dave Temkin wrote:
>>>> Yes, rapid-pvst and regular STP are directly inter-compatible.  The
>>>> rapid-pvst switch will run in regular STP mode for the ports
>>>> connected to
>>>> the client switch.
>>>>
>>>> -- 
>>>> David Temkin
>>>>
>>>> On Tue, 27 Sep 2005, Maxim Tuliuk wrote:
>>>>
>>>>> Hello!
>>>>> Our client connects to us using switch and two different fiber 
>>>>> links.
>>>>> Client's switch supports Spanning Tree (802.1D) only, on my side -
>>>>> catalyst
>>>>> 3550 (now: mode rapid-pvst).
>>>>> Can I build L2 backup using stp?
>>>>>
>>>>
>>>
>>> -- 
>>> Maxim Tuliuk
>>> WWW: http://primats.org.ua/~mt/
>>> ICQ: 21134222
>>>
>>> The bike is absolute freedom of moving
>>> _______________________________________________
>>> cisco-nsp mailing list  cisco-nsp at puck.nether.net
>>> https://puck.nether.net/mailman/listinfo/cisco-nsp
>>> archive at http://puck.nether.net/pipermail/cisco-nsp/
>>>
>>
>
> -- 
> Maxim Tuliuk
> WWW: http://primats.org.ua/~mt/
> ICQ: 21134222
>
> The bike is absolute freedom of moving
>