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Device Manager Guide, Cisco ACE 4700 Series Application Control Engine Appliance
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Chapter 11 Configuring High Availability
Configuring ACE High Availability
Configuring ACE High Availability
The tasks involved with configuring high availability are described in Table 11-1.
Related Topics
• Understanding ACE Redundancy, page 11-2
• High Availability Polling, page 11-2
• Synchronizing High Availability Configurations with ACE Appliance Device Manager, page 11-6
• Configuring High Availability Peers, page 11-8
• Configuring ACE High Availability Groups, page 11-11
• High Availability Tracking and Failure Detection Overview, page 11-17
Configuring High Availability Peers
Note This functionality is available for only Admin contexts.
Fault-tolerant peers use a fault-tolerant VLAN to transmit and receive heartbeat packets and state and
configuration replication packets. The standby member uses the heartbeat packet to monitor the health
of the active member, while the active member uses the heartbeat packet to monitor the health of the
standby member. When the heartbeat packets are not received from the active member when expected,
switchover occurs and the standby member assumes all active communications previously on the active
member.
Use this procedure to:
• Identify the two members of a high availability pair.
• Assign IP addresses to the peer ACE appliances.
• Assign a fault-tolerant VLAN to high availability peers and bind a physical Gigabit Ethernet
interface to the FT VLAN.
• Configure heartbeat frequency and count on the ACE appliances in a fault-tolerant VLAN.
Table 11-1 High Availability Task Overview
Task Refere nce
Step 1
Create a fault-tolerant VLAN and identify peer IP
addresses and configure peer appliances for
heartbeat count and interval.
Configuring High Availability Peers, page 11-8
Step 2
Create a fault-tolerant group, assign peer
priorities, associate the group with a context, place
the group in service, and enable automatic
synchronization.
Configuring ACE High Availability Groups,
page 11-11
Step 3
Configure tracking for switchover. High Availability Tracking and Failure
Detection Overview, page 11-17
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