Cisco ACE-4710-K9 Administration Guide - Page 283
Configuring a Probe on the Active Member for Host Tracking, probe, priority
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Chapter 7 Configuring Redundant ACE Appliances Configuring Tracking and Failure Detection Configuring a Probe on the Active Member for Host Tracking Configure one or more probes on the active FT group 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 active member, use the probe command in FT track host configuration mode. The syntax of this command is: 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 active 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 active member by the value of the number argument. If the resulting priority of the FT group on the active member is less than the priority of the FT group on the standby member, a switchover occurs. Note If you remove a probe from the active FT group member configuration and you have not configured a tracking priority for the FT group (see the "Configuring a Priority on the Active Member for Multiple Probes" section), the ACE increments the net FT group priority by the priority value of the deleted probe. You cannot delete a probe from the running-configuration file if the ACE is using the probe for tracking. For example, enter: host1/Admin(config-ft-track-host)# probe TCP_PROBE1 priority 50 To remove the tracking probe from the active member, enter: host1/Admin(config-ft-track-host)# no probe TCP_PROBE1 OL-11157-01 Cisco 4700 Series Application Control Engine Appliance Administration Guide 7-31