User's Manual

Table Of Contents
Wireless LAN Array
Installing the XS-3900 29
Figure 20. Deployment Scenario (18 Mbps)—Per Sector
Failover Planning
This section discusses failover protection at the unit and port levels.
Unit Failover Protection
In the rare event that an XS-3900 becomes unavailable, it is suggested that you
deploy a backup unit. Backup units monitor primary units via an Ethernet switch
and continue to provide wireless services in the event that the primary unit
becomes unavailable. Any XS-3900 can be set up as a backup unit. Backup units
should be located near primary units.
Figure 21. Unit Failover Protection
Primary
Active mode Offline mode until needed
Backup
heartbeat monitor
Ethernet switch