Extreme Networks Summit WM User Manual page 243

Configuring fast failover
Before you configure the fast failover feature, you must ensure:
The primary and secondary Summit WM Controllers are properly configured in 'availability' mode.
For more information, see
The pair of Summit WM Controllers in availability mode is formed by one of the following
combinations:
WM200/2000 and WM200/2000
WM20 and WM20
WM200/2000 and WM20
Both the primary and secondary Summit WM Controllers are running Summit WM Software V5R3
release.
A network connection exists between the two Summit WM Controllers.
The Altitude APs are operating in the 'availability' mode.
The deployment is designed in such a way that the service provided by the Altitude APs is not
dependent on which Summit WM Controller the APs associate with. For example, the fast failover
feature will not support the deployment in which the two Summit WM Controllers in the availability
mode are connected via a WAN link.
Both the primary and secondary Summit WM Controllers have equivalent upstream access to the
servers on which they depend. For example, both the controllers must have access to the same
RADIUS and DHCP servers.
The users (client devices) that use DHCP on WM-AD must obtain their addresses from a DHCP
Server that is external to the Summit WM Controller.
Time on all the network elements - both the Summit WM Controllers in availability pair, Altitude
APs, DHCP and RADIUS servers etc.- is synchronized. For more information, see
network time" on page
NOTE
The fast failover feature works optimally in fast networks (preferably switched networks).
To configure the fast failover feature:
1 Log on both the primary and secondary Summit WM Controllers.
2 From the main menu of the primary Summit WM Controller, click Altitude AP Configuration. The
AP Properties page is displayed.
3 In the left pane, click WAP Registration. The WAP Registration page is displayed.
Summit WM User Guide, Software Version 5.3
"Availability" on page
56.
231.
"Configuring
243