[c-nsp] Maximum spannig tree instances

[Tim Stevenson]

Hi Matt,

The 6500/sup720 on 33SXI supports 100K logical ports in MST, and 12K 
in RPVST. That's up from 50K/10K in every prior release.

N7K supports 75K in MST & 16K in RPVST today. There are no per-module 
limitations on N7K.

Those numbers are based on the requirements we expressed to QA/system 
test prior to FCS. The original numbers were confirmed prior to 33SXI 
was released. Since then, we have not had a customer 
requirement/request to support more, so frankly we have not felt 
compelled to go and requalifify for anything greater. Would be 
curious to know how many logical ports you are running today & in 
what protocol?

Thanks,
Tim


At 08:51 PM 7/16/2009, Matt Buford opined:
>My Cisco team suggested the Nexus as a potential way to alleviate my 6500
>virtual port limitation pain.  I asked for specifics on the STP limits of
>the Nexus, and they are significantly lower than the 6500.  Oops.




Tim Stevenson, tstevens at cisco.com
Routing & Switching CCIE #5561
Technical Marketing Engineer, Cisco Nexus 7000
Cisco - http://www.cisco.com
IP Phone: 408-526-6759
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