Configuring Redundancy; Configuring An Ft Vlan - Cisco 4700M Administration Manual

Chapter 6 Configuring Redundant ACEs

Configuring Redundancy

This section describes how to configure redundancy on the ACE and contains the following topics:
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Requirements
You must configure the ft interface, ft peer, and ft group commands on all ACEs that participate in the
redundancy configuration.

Configuring an FT VLAN

This section describes how to configure an FT VLAN. Peer ACEs communicate with each other over a
dedicated FT VLAN. These redundant peers use the FT VLAN to transmit and receive heartbeat packets
and state and configuration replication packets. You must configure the same VLAN on each peer
appliance.
Prerequisites
To configure one of the Ethernet ports or a port-channel interface on the ACE for fault tolerance using
a dedicated FT VLAN for communication between the members of an FT group, use the ft-port vlan
command in interface configuration mode (see the Cisco 4700 Series Application Control Engine
Appliance Routing and Bridging Configuration Guide).
When you specify the ft-port vlan command, the ACE modifies the associated Ethernet port or
Note
port-channel interface to a trunk port.
When you specify an Ethernet port as a dedicated FT VLAN, you have the option to either configure the
dedicated VLAN as the only VLAN associated with the Ethernet port or to include it as part of a VLAN
trunk link (see the Cisco 4700 Series Application Control Engine Appliance Routing and Bridging
Configuration Guide). Note that the ACE automatically includes the FT VLAN in the VLAN trunk link.
If you choose to configure VLAN trunking, it is not necessary for you to assign the FT VLAN in the
trunk link along with the other VLANs.
We recommend that you enable Quality of Service (QoS) on the FT VLAN port to provide higher priority for
FT traffic. See the Cisco 4700 Series Application Control Engine Appliance Routing and Bridging
Configuration Guide for details.
Restrictions
This topic includes the following restrictions:
OL-20823-01
Configuring an FT VLAN
Configuring an Alias IP Address
Configuring an FT Peer
Configuring an FT Group
Specifying the Peer Hostname
Specifying the MAC Address Banks for a Shared VLAN
Forcing a Failover
Synchronizing Redundant Configurations
Cisco 4700 Series Application Control Engine Appliance Administration Guide
Configuring Redundant ACEs
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