Concept Guide

l When a W-IAP without 3G/4G card is already elected as the Virtual Controller and is up for more than 5
minutes, the Virtual Controller will not be replaced until it goes down.
W-IAP135 is preferred over W-IAP105 when a Virtual Controller is elected.
Preference to a W-IAP with Non-Default IP
The Master Election Protocol prefers a W-IAP with non-default IP, when electing a Virtual Controller for the
Instant network during initial startup. If there are more than one W-IAP with non-default IPs in the network, all
W-IAPs with default IP will automatically reboot and the DHCP process is used to assign new IP addresses.
Viewing Master Election Details
To verify the status of a W-IAP and master election details, use the following commands:
(Instant AP)# show election statistics
(Instant AP)# show summary support
Manual Provisioning of Master W-IAP
In most cases, the master election process automatically determines the best W-IAP that can perform the role
of Virtual Controller, which will apply its image and configuration to all other W-IAPs in the same AP
management VLAN. When the Virtual Controller goes down, a new Virtual Controller is elected.
Provisioning a W-IAP as a Master W-IAP
You can provision a W-IAP as a master W-IAP by using the Instant UI or CLI.
In the Instant UI
1. On the Access Points tab, click the W-IAP to modify. The edit link is displayed.
2. Click the edit link. The edit window for modifying W-IAP details is displayed.
3. Select Enabled from Preferred master drop-down. This option is disabled by default.
Figure 25 W-IAP Settings—Provisioning Master W-IAP
4. Click OK.
Dell Networking W-Series Instant 6.4.3.1-4.2.0.0 | User Guide Customizing W-IAP Settings | 94