HPE FlexFabric 7900 Series Security Configuration Manual page 40

response from the server within the timer, it sets the server to the blocked state and resends the
request to another HWTACACS server.
•
Real-time accounting timer (realtime-accounting)—Defines the interval at which the device
sends real-time accounting packets to the HWTACACS accounting server for online users.
•
Server quiet timer (quiet)—Defines the duration to keep an unreachable server in blocked
state. If a server is not reachable, the device changes the server status to blocked, starts this
timer for the server, and tries to communicate with another server in active state. After the
server quiet timer expires, the device changes the status of the server back to active.
The server quiet timer setting affects the status of HWTACACS servers. If the scheme includes one
primary HWTACACS server and multiple secondary HWTACACS servers, the device communicates
with the HWTACACS servers based on the following rules:
•
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 operations:
Changes the server 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 operations:
Changes the server 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 the primary server and secondary servers are all in blocked state, the device 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 the status of an HWTACACS server changes automatically, the device changes the
status of this server 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.
Command
system-view
hwtacacs scheme
hwtacacs-scheme-name
timer response-timeout
seconds
timer realtime-accounting
minutes
32
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