Mailing List Archive: Cisco: NSP

Spanning tree limits on 4500

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joohwil at gmail

Nov 19, 2009, 3:28 AM

Post #1 of 3 (423 views)
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Spanning tree limits on 4500

What are the limits for spanning tree on Cisco 4500? I'm interested
both in MST and PVST+.

Is it a set "STP instances" like normal switches, or virtual/logical
ports like 6500? And what are the numbers? Any funky commands to
check?

I searched the archives but couldn't find anything on 4500s.
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clinton at scripty

Nov 23, 2009, 11:15 AM

Post #2 of 3 (354 views)
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Re: Spanning tree limits on 4500 [In reply to]

The Catalyst 4500 supports 3000 logical instances with the SupV from
what I was able to find. With MST, the capacity is further increased:

MST logical instances = access ports + ( trunk ports * MST instances)

John Wilkes wrote:
> What are the limits for spanning tree on Cisco 4500? I'm interested
> both in MST and PVST+.
>
> Is it a set "STP instances" like normal switches, or virtual/logical
> ports like 6500? And what are the numbers? Any funky commands to
> check?
>
> I searched the archives but couldn't find anything on 4500s.
> _______________________________________________
> cisco-nsp mailing list cisco-nsp [at] puck
> https://puck.nether.net/mailman/listinfo/cisco-nsp
> archive at http://puck.nether.net/pipermail/cisco-nsp/
>

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joohwil at gmail

Nov 24, 2009, 12:46 AM

Post #3 of 3 (361 views)
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Re: Spanning tree limits on 4500 [In reply to]

On Mon, Nov 23, 2009 at 8:15 PM, Clinton Work <clinton [at] scripty> wrote:
> The Catalyst 4500 supports 3000 logical instances with the SupV from what I
> was able to find. With MST, the capacity is further increased:
>
> MST logical instances = access ports + ( trunk ports * MST instances)

So as long as I'm under 3000 in "show spanning-tree summary total" I
should be fine?

Do you know of any limit to the number of simultaneous VLANs?
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