Monday 2 February 2015

STP port limit exceeded error message

The "STP port limit exceeded" error message occurs when the number of vlan-port instances exceeds the limit on trunk ports.
Possible Cause

This error signals a scalability limit for the Cisco Nexus 5000. The software calculates the number of STP VLAN port instances by multiplying the number of ports by the number of VLANs. The "STP port limit exceeded" error message occurs when the limit on trunk ports is exceeded is logged on the Cisco Nexus 5000 switch.

Solution
Decrease the number of VLANs carried over trunk ports or decrease the number of active VLANs.
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2 comments:

  1. Eugene14 September 2021 at 03:35

    thanks

    ReplyDelete
  2. ehernandez24 February 2022 at 15:50

    Can spanning-tree port type edge trunk (enabling portfast) mitigate this scalability issue as well? reducing the STP instances in the trunk ports. Obviously configuring this only on server facing ports

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