RE: What happens with too many VLANs?

From: Marko Berend (marko.berend@storm.hr)
Date: Thu Jan 22 2004 - 12:01:26 GMT-3

I found that c3550 supports 128 instances of STP. I tested it.
I also tested MST with only one STP instance for all vlans between 2 cat3550s. It works ok with 128+ vlans or any number of vlans.

Also 2950 with enhanced image supports MST.

Thanks Jeff

-----Original Message-----
From: Jeff Chambers [mailto:jc@nuvox.net]
Sent: 22. sijehanj 2004 15:54
To: ccielab@groupstudy.com
Subject: RE: What happens with too many VLANs?

I didn't immediately find documentation relating to the 3500 series of switches. However, I know that the limitation exists on that series as well.

http://www.cisco.com/en/US/products/hw/switches/ps4916/products_configuratio
n_guide_chapter09186a008017e52f.html

Supported Spanning-Tree Instances
The switch supports the per-VLAN spanning tree (PVST) and a maximum of 64 spanning-tree instances. For information about how spanning tree interoperates with the VLAN Trunking Protocol (VTP), see the "STP Configuration Guidelines" section.

Jeff.

-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of Marko Berend
Sent: Thursday, January 22, 2004 3:02 AM
To: ccielab@groupstudy.com
Subject: RE: What happens with too many VLANs?

Hi.

Can anyone please post a link to this problem?
I can't find anything on CCO that would say how many STPs a given switch supports. Product reference guide says 250 vlans but this is rediculous.

Thanks,
Marko

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