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Cisco 4700 Series Application Control Engine Appliance Administration Guide
OL-11157-01
Chapter 7 Configuring Redundant ACE Appliances
Configuring Tracking and Failure Detection
To remove the host tracked by the standby member, enter:
host1/Admin(config-ft-track-host)#
no peer track-host 172.16.27.1
Configuring a Probe on the Standby Member for Host Tracking
Configure one or more probes on the standby member to track the health of the
gateway or host. For details about creating probes, see the
Cisco 4700 Series
Application Control Engine Appliance Server Load-Balancing Configuration
Guide
. To associate an existing probe with a gateway or host for tracking by the
standby member, use the
peer
probe
command in FT track host configuration
mode. The syntax of this command is:
peer probe
name
priority
number
The keyword and arguments are:
•
name
—Identifier of an existing probe that you want to associate with a
gateway or host for tracking
•
priority
number
—Specifies the priority of the probe sent by the standby
member. Enter an integer from 0 to 255. The default is 0. Higher values
indicate higher priorities. Assign a priority value based on the relative
importance of the gateway or host that the probe is tracking. If the probe goes
down, the ACE decrements the priority of the FT group on the standby
member by the value of the
number
argument.
For example, enter:
host1/Admin(config-ft-track-host)#
peer probe TCP_PROBE1 priority 25
To remove the tracking probe from the standby member, enter:
host1/Admin(config-ft-track-host)#
no peer probe TCP_PROBE1
Configuring a Priority on the Standby Member for Multiple Probes
You can configure a tracking priority that the standby member of an FT group uses
when multiple tracking probes are defined. To assign a priority for multiple
probes on the standby member, use the
peer priority
command in FT track host
configuration mode. The syntax of this command is:
peer priority
number