if u choose DHCP overide then it means you are using an external DHCP server.For each interface you can have the WLC to act as the DHCP server.So clients will get ip addresses from the DHCP server address specified.
so if u want to create a dhcp server for each interface you can do that...its possible.
if the ip address is configured in the override field it means that the wifi user gets their ip address from the WLC ..that means the WLC is now the DHCP server. but if you choose the required box then your user gets their IP addresses from the external DHCP server.
If you use DHCP override, the wireless client will get an IP address from the DHCP server specified, without DHCP override it will get an IP address from the DHCP server(s) specified on the interface associated with the WLAN. (assuming DHCP required is ticked)
The only difference is that you can only specify 1 DHCP server using DHCP override, where as on the interface, you can specify 2.
Transferring Crash file from standby: Login to the Active WLC in HA.
From CLI: (Cisco Controller) >transfer upload datatype crash (Cisco
Controller) >transfer upload filename (Cisco
Controller) >transfer upload mode tftp (Cisco Controller) >transfer
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