Installation guide

CHAPTER

11-1

Device Manager Guide, Cisco ACE 4700 Series Application Control Engine Appliance

OL-26645-02

Configuring High Availability

This chapter describes how to configure high availability. High Availability (or fault tolerance) uses a

maximum of two ACE appliances to ensure that your network remains operational even if one of the

appliances becomes unresponsive. Redundancy ensures that your network services and applications are

always available.

Note Redundancy is not supported between an ACE appliance and an ACE module operating as peers.

Redundancy must be of the same ACE device type and software release.

Note When you use the ACE CLI to configure named objects (such as a real server, virtual server, parameter

map, class map, health probe, and so on), consider that the Device Manager (DM) supports object names

with an alphanumeric string of 1 to 64 characters, which can include the following special characters:

underscore (_), hyphen (-), dot (.), and asterisk (*). Spaces are not allowed.

If you use the ACE CLI to configure a named object with special characters that the DM does not

support, you may not be able to configure the ACE using DM.