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The STP: opt: VLAN: get ports: no free chunk available error message is displayed in the logs of Catalyst series switches

Core issue

This error occurs when the Spanning Tree Protocol (STP) debug is on. These messages  are cosmetic and occur when you have either bridge groups or VLANs. This is caused by the specific debug spanning tree exception and can be ignored.

Resolution

This issue is documented in Cisco bug ID CSCdt71887.

Ignore these messages:

  • Externally found moderate defect: Resolved (R)       
  • Bridge group no free chunk available

The feature these messages refer to (optimized BPDU transmission for switch VLAN spanning trees) is not used by the bridge group.

For a workaround, do not issue the debug spanning-tree exceptions command.

Error message

STP: opt: VLAN: get ports: no free chunk available

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