Cisco Cisco IOS Software Release 12.2(27)SBC

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AAA Authorization and Authentication Cache
  Feature Information for Implementing Authorization and Authentication Profile Caching
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Cisco IOS Release 12.2(28)SB
Note
 lists only the Cisco IOS software release that introduced support for a given feature in a given 
Cisco IOS software release train. Unless noted otherwise, subsequent releases of that Cisco IOS 
software release train also support that feature.
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Table 4
Feature Information for Implementing Authentication and Authorization Profile Caching
Feature Name
Release
Feature Information
AAA Authorization and Authentication Cache
12.2(28)SB
This feature optimizes network performance and provides a 
failover mechanism in the event a network RADIUS or 
TACACS+ server becomes unavailable for any reason.
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