STP

Unanswered Question
Aug 14th, 2008

Cisco Design Guidelines state that network architecture should be such that STP must be avoided -say by limiting VLANs to a closet-to make convergence predictable and bounded.Can somebody elaborate how can this help?

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m.glosson Thu, 08/14/2008 - 09:04

If your closet switch is layer-3 capable (3560, 3750, 4500, etc), you can use layer-3 uplinks back to core or distribution switches. This makes all VLANs local and spanning-tree only lives on that switch (or group of switches in that closet). Let your routing protocol, such as EIGRP, worry about keeping you with a loop-free topology.

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