WLC WAN Backup
My customer would like to have a Backup-WLC-Controller at their main site.
On the remote site he has a 5508 with actually 6 accesspoints.
On the mainsite he has also a 5508 which acts as backup only. They have a 2Mbit WAN between this two sites.
I configured in "Wireless - Global Configuration" the IP of the Backup-controller and a heartbeat.
When pulling the plug of the Remote-WLC, all accesspoint are moving to the backup-controller of the main site. This works perfect.
When I plug in again the controller of the remote site, the accesspoints to not jump back.
They only jump back when I configure on each AP under "High Avalability" the Primary Controller. Ok, the customer only has 6 APs, but what if they had more the 100 or so. Do I have to put in the IP of the primary controller on each AP or is there another way???
Next question: The client on the remote site is logged in to the WLAN and has an DHCP-IP and Gateway of the local site.
In case of WLC-failure the client gets a new IP via the DHCP of the Backup-Controller-site. That works fine.
But when the controller comes back and all APs are also jumping back, the client fails.
I have to shutdown its network card and activate it again. After that the client finds the WLAN-SSID and gets a DHCP address again.
How can I solve this problem without always reloading the network card of the client? Is this a windows problem. Tried with XP and 7.