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Cisco Bug: CSCte75465 - VMPS BLOCKED entry do not get removed against the NULL VLAN

Last Modified

Feb 22, 2014

Products (81)

  • Cisco Catalyst 3750 Series Switches
  • Cisco Catalyst 2960-48TT-S Switch
  • Cisco Catalyst 3560E-48PD-E Switch
  • Cisco Catalyst 2960-24-S Switch
  • Cisco Catalyst 3560E-12D-E Switch
  • Cisco Catalyst 3560E-48PD-SF Switch
  • Cisco Catalyst 3560G-48PS Switch
  • Cisco Catalyst 3560-12PC-S Compact Switch
  • Cisco ME 3400-24TS-A Switch
  • Cisco Catalyst 2960-24TC-L Switch
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Known Affected Releases


Description (partial)

Under some corner case condition, if primary VMPS server is not available and the switchport is configured for "access vlan dynamic", the switch stops sending queries to VMPS server for a Mac-address with NULL entry because VQP query times out, even if the VMPS Primary server is back up.

This behavior has been observed on a Catalyst 3750 platform running Cisco IOS version 12.2(46)SE
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