Brocade Virtual ADX Server Load Balancing Guide (Supporting ADX v03.1.00) - Manual (Page 137)

Brocade Virtual ADX Server Load Balancing Guide 121
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Miscellaneous options
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Enabling normal UDP aging for DNS and RADIUS
By default, the Brocade Virtual ADX immediately deletes a UDP DNS or RADIUS session table entry
when the Brocade Virtual ADX receives a reply for the application from a real server. You can
configure the Brocade Virtual ADX to instead age out DNS or RADIUS sessions normally using the
UDP age timer.
To age DNS or RADIUS sessions using the UDP age timer, enter the following command at the
global CONFIG level of the CLI.
Virtual ADX(config-vs-VIP1)#port dns udp-normal-age
Syntax: [no] port dns | radius udp-normal-age
For DNS and RADIUS UDP load balancing, unless the port is configured with this command, the
DNS or RADIUS sessions are always aged out after two minutes.
NOTE
By default, a Brocade Virtual ADX will exercise normal-age for DNS and RADIUS if the response is
fragmented traffic from a real server. If you would like to enable the fast-age feature for fragmented
traffic as well as non-fragmented traffic, you need to explicitly configure the udp-fast-age command
on the port level.
Setting TCP and UDP ages for VIPs
The TCP and UDP ages specify how many minutes a TCP or UDP session can remain inactive before
the Brocade Virtual ADX closes the session and clears the session from its session table. You can
set the TCP or UDP ages for a specific virtual server, and you can set the TCP or UDP ages for an
individual port on a virtual server.
NOTE
The session age is per minute and has a one minute range. For example, if you configured a TCP or
UDP age of three minutes for a virtual server, the age timeout is from two to three minutes.
For example, to set the TCP age for virtual server v1 to 20 minutes, enter the following commands.
Virtual ADX(config)#server virtual-name-or-ip v1
Virtual ADX(config-vs-v1)#tcp-age 20
Syntax: [no] tcp-age minutes
To set the UDP age for virtual server v1 to 26 minutes, enter the following commands.
Virtual ADX(config)#server virtual-name-or-ip v1
Virtual ADX(config-vs-v1)#udp-age 26
Syntax: [no] udp-age minutes
To set the TCP age for the HTTP port on virtual server v1 to 10 minutes, enter the following
commands.
Virtual ADX(config)#server virtual-name-or-ip v1
Virtual ADX(config-vs-v1)#port http tcp-age 10
Syntax: [no] port port tcp-age minutes
To set the UDP age for the SNMP port on virtual server v1 to 26 minutes, enter the following
commands.