Installation guide

11-12
Device Manager Guide, Cisco ACE 4700 Series Application Control Engine Appliance
OL-26645-02
Chapter 11 Configuring High Availability
Configuring ACE High Availability Groups
Assumption
At least one high availability pair has been configured. (See Configuring High Availability Peers,
page 11-8.)
Procedure
Step 1 Config > Virtual Contexts > High Availability (HA) > Setup. The ACE HA Management screen
appears at the top of the content area and the ACE HA Groups table appears at the bottom.
Step 2 In the ACE HA Groups table, click Add to add a new high availability group. The table refreshes with
the configurable fields.
Step 3 Check the Enabled check box to enable the high availability group. Clear the Enabled check box to
disable the high availability group.
Step 4 In the Context field, select the virtual context to associate with this high availability group.
Step 5 In the Priority (Actual) field, enter the priority you want to assign to the first appliance in the group.
Valid entries are integers from 1 to 255.
A member of a fault-tolerant group becomes the active member through a process based on the priority
assigned. In this process, the group member with the higher priority becomes the active member. When
you set up a fault-tolerant pair, use a higher priority for the group where the active member initially
resides.
Step 6 Check the Preempt check box to indicate that the group member with the higher priority is to always
assert itself and become the active member. Clear the Preempt check box to indicate that you do not want
the group member with the higher priority to always become the active member.
Step 7 In the Peer Priority (Actual) field, enter the priority you want to assign to the peer appliance in the group.
Valid entries are integers from 1 to 255.
A member of a fault-tolerant group becomes the active member through a process based on the priority
assigned. In this process, the group member with the higher priority becomes the active member. When
you set up a fault-tolerant pair, use a higher priority for the group where the active member initially
resides.
Step 8 Check the Autosync Run check box to enable automatic synchronization of the running configuration
files. Clear the Autosync Run check box to disable automatic synchronization of the running
configuration files. If you disable automatic synchronization, you need to update the configuration of
the standby context manually.
Note To understand how synchronization works between the active and the standby ACE appliances,
see Understanding ACE Redundancy, page 11-2 and Redundancy Configuration Requirements
and Restrictions, page 11-6.
Step 9 Check the Autosync Startup check box to enable automatic synchronization of the startup configuration
files. Clear the Autosync Run check box to disable automatic synchronization of the startup
configuration files. If you disable automatic synchronization, you need to update the configuration of
the standby context manually. See Manually Synchronizing Individual Virtual Context Configurations,
page 4-82.
Step 10 Do the following:
• Click Deploy Now to accept your entries. The ACE HA Groups table refreshes with the new high
availability group.