Configuring The Idle-Timeout Option; Configuring The Fast-Idle Option - HP 7102dl - ProCurve Secure Router Configuration Manual

Configuring Backup WAN Connections
Configuring Demand Routing for Backup Connections
3-36

Configuring the idle-timeout Option

You can configure the amount of time that the demand interface remains up
in the absence of interesting traffic. The idle timer helps to keep the backup
connection cost-effective: backup is only active when it is truly necessary. To
decrease your company's costs, you should configure the idle-timeout set-
ting to match the rates your public carrier charges for the ISDN (or analog)
line. For example, if your public carrier charges you for every two minutes of
usage, you should set the idle-timeout setting to be 120 seconds or just
slightly less than 120 seconds. That way, the backup connection will be
terminated before your company is charged for another two-minute time
interval.
From the demand interface configuration mode context, enter:
Syntax: idle-timeout <seconds>
Replace <seconds> with a number between 1 and 2147483. (The range is 1
second to more than 596 hours.)
The default setting is 120 seconds.

Configuring the fast-idle Option

You can assign BRI interfaces to more than one resource pool. You might want
to assign backup interfaces to more than one resource pool because it would
be unlikely that two primary interfaces would go down at the same time.
If a backup interface is in use and is needed to establish another connection,
the fast-idle option determines the number of seconds that the connection
will remain up in the absence of interesting traffic. Because the interface is in
contention, the fast-idle option drastically reduces the time the demand
remains up when it is not in use.
To configure this setting, enter the following command from the demand
interface configuration mode context:
Syntax: fast-idle <seconds>
Replace <seconds> with a number between 1 and 2147483. (The range is 1
second to more than 596 hours.)
The default setting is 20 seconds.
To return the option to the default setting, enter:
ProCurve(config-demand 1)# no fast-idle