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Summit WM Getting Started Guide, Software Version 5.1 113
8 Availability and Mobility configuration
The chapter describes how to configure the Summit WM Controller’s availability and mobility features.
The topics in this chapter are organized as follows:
● Availability overview
● Configuring availability feature
● Mobility overview
● Configuring mobility
Availability overview
The Summit WM Wireless LAN (WLAN) Solution’s availability feature maintains service availability in
the event of a Summit WM Controller outage.
The availability feature links two Summit WM Controllers to form a pair in order to share information
about their Wireless APs. If one Summit WM Controller fails, its Wireless APs are allowed to connect to
the other Summit WM Controller.
The Wireless APs that connect to a backup Summit WM Controller during a failover are assigned to the
WM-AD that is defined in the Summit WM Controller’s default Wireless AP configuration. If the
default Wireless AP configuration has no WM-AD assigned, the failover Wireless APs will not provide
service. Therefore it is very important to define a default Wireless AP configuration on all Summit WM
Controllers.
Configuring availability feature
Before you begin the availability configuration, you must ensure:
● A network connection exists between the two Summit WM Controllers. This connection is used to
enable the availability link between the Summit WM Controllers. The availability link is established
on port 13907.
● A DHCP server for the Wireless AP subnets is setup to support “Option 78 for SLP”, so that it points
to the IP addresses of the physical interfaces on both the Summit WM Controllers.
High-level overview of the availability configuration process
The following is a high-level overview of the availability configuration process:
● Step 1 – Define a WM-AD with the same SSID on each Summit WM Controller. For more
information on how to define a WM-AD, see Chapter 7, “WM-AD configuration.”
● Step 2 – Assign radios to WM-AD and confirm Poll Timeout value is 15 seconds on the Wireless AP
Default settings screen.