STP Logical Interfaces, virtual ports

aboelhouwers · ‎10-29-2007

As you probably know one have to take in account the max available numbers of virtual ports and logical interfaces for Spanning Tree when designing a switched network based on catalyst 6500's. Does somebody know if you also have these parameters if you're designing a network based on 4500's or 3750 stacks? And where to find it on the Cisco site

Rgrds

mchin345 · ‎11-02-2007

Number of VLANs and SVI supported per catalyst family is not always the same. For example a switch may support 256 VLAN , but only 64 SVIs.

cisco cat switches support up to 4096 VLANs depending on the platform and software version.

Cat 6500 -- max No -4094.

Cat 4500 -- max No - 4094.

Cat 3750 -- max No -1005.

aboelhouwers · ‎11-02-2007

My issue deals with Spanning Tree Protocol or better the scalability of STP. see the following document:

http://www.cisco.com/univercd/cc/td/doc/product/lan/cat6000/122sx/ol_4164.htm#wp26366

For choosing the right spanning tree protocol (RPVST+ or MST) you have to take logical interfaces and virtual ports into account on the 6500 platform. But what if you decide to use a different platform, for instance a 3750 stack.

Rgrds

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