WESM xl Getting Started Guide 2007-08

11
Introduction
■ A Module by default does not participate in any Redundancy Group and
is standalone. For a set of Wireless Edge Services xl Modules to become
a Redundancy Group, the administrator must configure each of them to
know about the other. Multiple groups may be formed and operated
independently. Each group is identified by a unique Group ID.
■ A Redundancy Group consists of a primary and one or more redundant
Modules, up to a total of 12 Modules. The additional redundant Modules
add bandwidth as well as network resiliency. You may use primary
Modules in place of the redundant Modules, but the extra licenses do not
add to the license level of the group. The Module with the highest license
level sets the license level for the group.
■ Two Redundant Wireless Services xl Modules may not be used together
to form a Redundancy Group.
■ A Redundancy Group member can be in ’Active’ or ’Standby’ mode. All
’Active’ members actively adopt the radio ports and load-balance among
the radio ports, up to the group’s authorization level. All ’Standby’
members adopt radio ports only when an ’Active’ member fails or a radio
port has not been adopted by any Module in the network.
An example of setting up a Redundancy Group is provided in this document.
For detailed information on Redundancy Group configuration and operation,
please refer to the latest Management and Configuration Guide for your
Wireless Edge Services xl Module, available at www.procurve.com.