It depends. If your wcs are all part of the same mobility group then you would go to each ap and assign the primary and or secondary wlc. You can use option 60 along with option 43 for specific APs to find the wlc or you can use DNS to have it join a wlc and then manually move it to the preferred wlc.
Here is the thing... If your AP's, the 1252 and 1142 are already joined to the WiSM, then you don't have to do anything. Now if you have a new 8500 and also 3602's and you want then to join the 8500, then just create a DNS entry for cisco-capwap-controller pointing to the 8500 management IP address. This way when a new ap boots up, it will look for that DNS and if found, will join the new 8500. Option 43 and DNS is really only used for the initial join. Once APs have joined, you can always use the high availability setting on each AP to have then know of the primary, secondary and or tertiary wlc's.
Don't make it harder than it is... Is your WiSM and the older 1252 and 1142's not up already?
You can add as many options 60's as you wish and add as many DNS entries for a record. I don't do it that way, but its up to you. I will have APs join a WLC and then assign them after. If you want to understand option 43/60, here is a good link.
The need to configure two different DHCP pool depends upon the Mobility groups. You can assign them to primary or secondary WLC using option 60 or 43 to find WLC.
When a Cisco Wireless Unified architecture is deployed, the lightweight Cisco Aironet access points (AP) can use a vendor-specific Dynamic Host Control Protocol (DHCP) Option 43 to join specific Wireless LAN Controllers (WLCs) when the WLC is in a different subnet than the LAP. This document describes how to use DHCP Option 43 and provides sample configurations for DHCP Option 43 for lightweight Cisco Aironet (APs) for DHCP servers.
Transferring Crash file from standby:
Login to the Active WLC in HA.
(Cisco Controller) >transfer upload datatype crash
(Cisco Controller) >transfer upload filename <Desired filename>
(Cisco Controller) >transfer up...
This is the start of a display filter cross reference between Wireshark and OmniPeek.
The 1st installment is a table of advanced filters. More filters will be added as time allows.
It is a living doc, so check back for changes every so often
Please feel ...
I have created a Powershell script to automatically add a Wireless Guest User on Cisco WLCs. (tested on 2500 Series)
The script should be completely self explanatory.
Powershell SNMP Module (Install-Module -Name SNMP)
SNMP Write Access to...