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Cisco Bug: CSCul90101 - Unexpected CDP packet clears ip phone authentication sesson

Last Modified

Apr 17, 2019

Products (6)

  • Cisco IOS
  • Cisco Catalyst 4948E-F Ethernet Switch
  • Cisco Catalyst 4948E Ethernet Switch
  • Cisco Catalyst 4500 Supervisor Engine 6L-E
  • Cisco Catalyst 4500 Supervisor Engine 6-E
  • Cisco Catalyst 4900M Switch

Known Affected Releases

12.2(51.12) 15.1(2)SG

Description (partial)

An interface configured for 802.1x and MAB gets stuck in a MAB Running state with a Cisco IP Phone connected.

4500 running 15.1(2)SG
802.1x configured in open mode on the interface and the interface configured for multi-domain or multi-auth.
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Bug Details Include

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  • Status
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