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Cisco Bug: CSCur02659 - ASR5x00 not authenticating secondary TACACS when ACL blocks primary IP

Last Modified

Jan 28, 2017

Products (1)

  • Cisco ASR 5000 Series

Known Affected Releases


Description (partial)

when using TACACS for authentication,  it can take multiple minutes for the authentication to succeed on the secondary server if the primary server is lost.

When the primary TACACS server is disabled by filtering traffic with an ACL/Firewall. The secondary server will not be used until the primary server's TCP connection has timed out. This can take several minutes by default.
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