Preview Tool

Cisco Bug: CSCum21037 - Cat4500X CTS behaivior inconsistent. CDP packets encrypted incorrectly

Last Modified

Dec 05, 2019

Products (1)

  • Cisco Catalyst 4000 Series Switches

Known Affected Releases


Description (partial)

UDLD (Unidirectional Link Detection) and CTS (Cisco Trustsec) work properly when enabled individually, but the link goes down when both are enabled together.

UDLD and CTS (manual mode) are enabled on a 4500X switch, and the link is shutdown as UDLD detects a unidirectional link.

Related Community Discussions

WS-4500X-32 Support for TrustSec MACsec Encryption
Hello all, Does anyone know when will the WS-4500X-32 s upport the TrustSec MACsec Encryption ? Thanks! David
Latest activity: Mar 09, 2015
Bug details contain sensitive information and therefore require a 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.