Guest

Preview Tool

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)

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

Conditions:
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.
Bug details contain sensitive information and therefore require a Cisco.com account to be viewed.

Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
  • Severity
  • Known Fixed Releases
  • Related Community Discussions
  • Number of Related Support Cases
Bug information is viewable for customers and partners who have a service contract. Registered users can view up to 200 bugs per month without a service contract.