[c-nsp] pvst+ & r-pvst (WAS Re: mst & pvst)

[Adam Greene]

Thanks, Peter!

----- Original Message ----- 
From: "Peter Rathlev" <peter at rathlev.dk>
To: "Adam Greene" <maillist at webjogger.net>
Cc: <cisco-nsp at puck.nether.net>
Sent: Tuesday, March 25, 2008 6:42 PM
Subject: Re: [c-nsp] pvst+ & r-pvst (WAS Re: mst & pvst)


> On Tue, 2008-03-25 at 17:53 -0400, Adam Greene wrote:
>> OK, I made my way into the 6509, and it's not running MST as expected, 
>> but
>> PVST+. Duh ... the configs say "set spantree mode pvst+" so I should have
>> known.
>>
>> Anyways.
>>
>> So ...
>>     6509: PVST+
>>     3750: rapid-PVST
>>
>> My impression is that the 3750 will fall back to 802.1D in this scenario,
>> which means slower convergence, but otherwise things will work OK.
>>
>> Any gotchas I should be aware of before I try this (besides checking the
>> topology and adjusting priorities as needed)?
>
> Nope, Rapid PVST is backwards compatible with PVST+, so just slower
> convergence on the PVST links.
>
> Regards,
> Peter
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