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Cisco Bug: CSCul61997 - Mac-Security:Mac address is not cleared from the table after timeout

Last Modified

Apr 17, 2019

Products (21)

  • Cisco ME 3600X Series Ethernet Access Switches
  • Cisco ASR 901-6CZ-FS-D Router
  • Cisco ASR 901-6CZ-F-D Router
  • Cisco ASR 901S-4SG-F-D Router
  • Cisco ME 3600X-24TS-M Switch
  • Cisco ASR 901-4C-FT-D Router
  • Cisco ASR 901S-2SG-F-AH Router
  • Cisco ASR 901-6CZ-F-A Router
  • Cisco ASR 901S-2SG-F-D Router
  • Cisco ASR 901-6CZ-FT-A Router
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Known Affected Releases


Description (partial)

Cisco Metro Ethernet 3600 Series devices running an affected version of IOS are affected by a configuration dependent denial of service issue.  An 
adjacent attacker that has the ability to connect directly to a port configured for port security could consume all MAC entries allowed on the port.  This is 
an expected result; Due to an error the learned MAC addresses may not expire causing the port to be inaccessible to new MAC addresses until cleared 
by an administrator.

Cisco Metro Ethernet 3600 Series devices running an affected version of Cisco IOS Software.
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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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