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Cisco Bug: CSCta78468 - 3560E/3750E: VMPS fails for PC behind an IP Phone

Last Modified

Jan 29, 2017

Products (51)

  • Cisco Catalyst 3560-E Series Switches
  • Cisco Catalyst 3560E-48PD-E Switch
  • Cisco Catalyst 3560E-24TD-S Switch
  • Cisco Catalyst 2960-48TT-S Switch
  • Cisco Catalyst 3560E-12D-E Switch
  • Cisco Catalyst 3750V2-24PS Switch
  • Cisco Catalyst 3560E-48PD-SF Switch
  • Cisco Catalyst 3750G-12S Switch
  • Cisco Catalyst 2960-24-S Switch
  • Cisco Catalyst 3750-24FS Switch
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Known Affected Releases


Description (partial)


Hosts/PCs connected to IP Phones are denied access to network when dynamic
vlan membership is configured. The IP Phone will continue to operate correctly
on the voice vlan.
This issue is seen in Cat3750E and Cat3560E switches.
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Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
  • Severity
  • Known Fixed Releases
  • Related Community Discussions
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