HP VSR1000 Security Configuration Manual page 49

When the primary server is in active state, the device communicates with the primary server.
•
• If the primary server fails, the device performs the following tasks:
Changes the server's status to blocked.
Starts a quiet timer for the server.
Tries to communicate with a secondary server in active state that has the highest priority.
If the secondary server is unreachable, the device performs the following tasks:
•
Changes the server's status to blocked.
Starts a quiet timer for the server.
Tries to communicate with the next secondary server in active state that has the highest priority.
• The search process continues until the device finds an available secondary server or has checked
all secondary servers in active state. If no server is available, the device considers the authentication,
authorization, or accounting attempt a failure.
When the quiet timer of a server expires, the status of the server changes back to active. The device
•
does not check the server again during the authentication, authorization, or accounting process.
When you remove a server in use, communication with the server times out. The device looks for a
•
server in active state by first checking the primary server, and then checking secondary servers in
the order they are configured.
When all servers are in blocked state, the device only tries to communicate with the primary server.
•
When one or more servers are in active state, the device tries to communicate with these active
•
servers only, even if they are unavailable.
• When an HWTACACS server's status changes automatically, the device changes this server's
status accordingly in all HWTACACS schemes in which this server is specified.
To set HWTACACS timers:
Step
1. Enter system view.
2. Enter HWTACACS scheme
view.
3. Set the HWTACACS server
response timeout timer.
4. Set the real-time accounting
interval.
5. Set the server quiet timer.
Displaying and maintaining HWTACACS
Execute the display command in any view and the reset command in user view.
Command
system-view
hwtacacs scheme
hwtacacs-scheme-name
timer response-timeout seconds
timer realtime-accounting minutes
timer quiet minutes
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Remarks
N/A
N/A
By default, the HWTACACS server
response timeout timer is 5
seconds.
By default, the real-time accounting
interval is 12 minutes.
A short interval helps improve
accounting precision but requires
many system resources. When
there are 1000 or more users, set a
longer interval.
By default, the server quiet timer is
5 minutes.