User's Guide

Table Of Contents
hwc_fastfailover.fm
Availability and session availability
Session availability
9034530-02,
March 2010
HiPath Wireless Controller, Access Points and Convergence Software V7.11, User Guide 397
Time on all the network elements — both the HiPath Wireless Controllers in
availability pair, Wireless APs, DHCP and RADIUS servers etc.— is
synchronized. For more information, see Section 3.4.10, “Configuring
network time”, on page 79.
Note: The fast failover feature works optimally in fast networks (preferably
switched networks).
To configure fast failover and enable session availability:
1. Log on to both the primary and secondary HiPath Wireless Controllers.
2. From the main menu of the primary HiPath Wireless Controller, click
Wireless Controller Configuration. The Wireless Controller
Configuration screen is displayed.
3. In the left pane, click Availability.
4. Under Controller Availability Settings, select Paired.
5. Select the Enable Fast Failover checkbox.
6. Type the appropriate value in the Detect link failure box.
The Detect link failure field specifies the time period within which the system
detects link failure after the link has failed. For fast failover configuration, this
parameter is tied closely to the Poll Timeout parameter on the AP
Properties tab Advanced dialog. The Poll Timeout field specifies the time
period for which the Wireless AP waits before re-attempting to establish a link
when its polling to the primary HiPath Wireless Controller fails.