WESM zl Management and Configuration Guide WT.01.28 and greater

10-2

Redundancy Groups

High Availability for Wireless Services

For many companies, wireless access has become as critical to their business as

traditional wired access. Recognizing the importance of wireless access, ProCurve

Networking has designed its wireless services with high availability in mind.

To protect the availability of your company’s wireless services, purchase multiple

Wireless Edge Services zl Modules and place them in a redundancy group. ProCurve

Networking provides two types of modules, both of which can be members of a

redundancy group:

■ Wireless Edge Services zl Module (J9051A)

■ Redundant Wireless Services zl Module (J9053A)

In this chapter, a Wireless Edge Services zl Module is called a primary module, and

a Redundant Wireless Services zl Module is called a redundant module.

The section below describes the particular features of a Redundant Wireless Services

zl Module. The next section, “Redundancy Group” on page 10-3, explains how both

types of modules work together in a redundancy group.

Redundant Wireless Services zl Module

To provide failover capabilities for the ProCurve Wireless Edge Services zl Module

(J9051A), you can purchase a Redundant Wireless Services zl Module (J9053A).

The Redundant Wireless Services zl Module provides the same functionality as the

Wireless Edge Services zl Module, with one exception: the redundant module does

not have any radio port (RP) licenses. On its own, the redundant module cannot adopt

any RPs.

When combined with one or more Wireless Edge Services zl Modules in a redun-

dancy group, however, the Redundant Wireless Services zl Module can adopt RPs

under certain circumstances. Primarily, the redundant module is designed to adopt

RPs if one of the primary Wireless Edge Services zl Modules becomes unavailable

for any reason. However, you can also configure the Redundant Wireless Services zl

to use a primary module’s licenses to adopt RPs at any time. (For more information

about RP adoption in a redundancy group, see “Adopting RPs” on page 10-5.)

The redundant module has its own software image and configuration file. Before a

redundant module can deliver wireless services for your network, you must configure

it to provide those services—just as you would configure a primary module.