Cisco Cisco Packet Data Gateway (PDG)
Global Configuration Mode Commands (A-K)
high-availability ▀
Command Line Interface Reference, StarOS Release 17 ▄
5367
high-availability
Configures the speed for detection of packet processing card task failures before switchover occurs.
Product
PDSN
GGSN
ASN-GW
Privilege
Security Administrator, Administrator
Mode
Exec > Global Configuration
configure
Entering the above command sequence results in the following prompt:
[local]host_name(config)#
Syntax
high-availability fault-detection speed { aggressive | normal }
default high-availability fault-detection speed
default
Resets fault detection speed to normal.
aggressive
Specifies packet processing card failover should occur without performing additional checks.
normal
Specifies that packet processing card failover will only occur after additional checks have been performed
performed. This is the default setting.
performed. This is the default setting.
Usage
Use this command to increase the fault detection speed for faster switchovers after a packet processing card
task failure.
Setting fault detection speed to aggressive will trigger packet processing card failover as soon as possible if a
potential failure is detected. Aggressive mode will reduce the duration of subscriber outages caused by a
failed packet processing card if session recovery is enabled.
Aggressive mode also bypasses most information gathering steps and logs that can be used to determine the
root cause of the failure.
In normal mode, additional checks are performed before triggering a packet processing card failover to ensure
that the card has actually failed. In aggressive mode these checks are bypassed so that session recovery can
start as soon as possible. These additional checks reduce the likelihood of a false positive failure.
task failure.
Setting fault detection speed to aggressive will trigger packet processing card failover as soon as possible if a
potential failure is detected. Aggressive mode will reduce the duration of subscriber outages caused by a
failed packet processing card if session recovery is enabled.
Aggressive mode also bypasses most information gathering steps and logs that can be used to determine the
root cause of the failure.
In normal mode, additional checks are performed before triggering a packet processing card failover to ensure
that the card has actually failed. In aggressive mode these checks are bypassed so that session recovery can
start as soon as possible. These additional checks reduce the likelihood of a false positive failure.
Example
The following command sets the fault detection speed for packet processing card tasks to
aggressive
: