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Cisco Bug: CSCvt72401 - MACSEC protected link no longer passes traffic.

Last Modified

Sep 10, 2020

Products (32)

  • Cisco Catalyst 9500 Series Switches
  • Cisco Catalyst 9300-48T-A Switch
  • Cisco Catalyst 9400 Supervisor Engine-1XL-Y
  • Cisco Catalyst C9500-16X-E Switch
  • Cisco Catalyst 9300-48P-A Switch
  • Cisco Catalyst 9300-48U-A Switch
  • Cisco Catalyst 9300-48UXM-A Switch
  • Cisco Catalyst 9300-48UN-A Switch
  • Cisco Catalyst 9300-48P-E Switch
  • Cisco Catalyst C9500-24Q-A Switch
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Known Affected Releases


Description (partial)

A MACSEC protected link that was up and passing traffic will stop passing traffic after a period of time. The MKA session will remain up but no traffic including LLDP/CDP/ARP will pass across the link.

Additionally the MACSEC protected link was configured to use replay protection and the configured value of the replay-protection window-size was larger than 2^30-1

MACSEC protected link utilizing XPN (extended packet numbering) ciphers and having a replay-protection window-size value larger than 2^30-1 configured.
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