Extreme Networks Summit WM Series Podręcznik Użytkownika Pobierz pdf (Strona 103)

Summit WM-Series WLAN Switch and Altitude Access Point Software Version 1.0 User Guide

103

7 Summit WM-Series Switch Configuration:

Availability and Mobility

Availability

The Summit WM-Series Switch Software system provides a feature that maintains service availability in

the event of a Summit WM-Series Switch outage.

The Availability feature links two Summit WM-Series Switches as a pair, so that they share information

about their Altitude APs. If one Summit WM-Series Switch in a pair fails, then its Altitude APs are

allowed to connect instead to the second Summit WM-Series Switch. The second Summit WM-Series

Switch provides the wireless network and a pre-assigned WM-AD for the Altitude AP.

From the viewpoint of a Altitude AP, if its home Summit WM-Series Switch fails, the Altitude AP

reboots and begins its discovery process. The Altitude AP will be directed to the appropriate second

Summit WM-Series Switch of the pair.

NOTE

The Availability feature relies on SLP and a DHCP server that supports Option 78, as described earlier in the

Altitude AP discovery and registration process. The Availability feature controls how the paired Summit WM-Series

Switches register as services with SLP, in normal operations and in the event of an outage.

The wireless device users that were on the Altitude AP must log in again and become authenticated on

the second Summit WM-Series Switch.

The Availability feature is set up in the Altitude AP Registration Mode screen.

Prepare for setting up the Availability feature

Before you begin, the following preparation should be done:

● Choose which Summit WM-Series Switch is the primary and which is the secondary.

● Determine the physical communication link for the TCP/IP connection between the two Summit

WM-Series Switches (this is done over TCP port 13907), and ensure that the interfaces used for this

connection are routable.

● Set up DHCP to support Option 78 for SLP, so that it points to the IP addresses of the physical

interfaces on both Summit WM-Series Switches that the Altitude APs are connected to, or can reach

after the Availability setup.

Now set up each Summit WM-Series Switch separately. One method is as follows:

1 In the AP Registration screen, set up each Summit WM-Series Switch in “Stand-alone Mode” and

“Secure Mode” (allow only approved Altitude APs to connect).

2 In the WM-AD Configuration, Top ol ogy screen, define a WM-AD on each Summit WM-Series Switch

with the same SSID (but different IP addresses).

3 On one Summit WM-Series Switch, allow all Altitude APs to associate with it. Then set the

Registration Mode to “Allow only approved” so that no more Altitude APs can register.

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Extreme Networks Summit WM Series Podręcznik Użytkownika Strona 103