It's the ap trying to discover a controller via dns. You have a wireless lan controller? You need one with this type of ap. If you look at the model number printed on the back of the ap, you will see LAP1242 or LAP1131, these are lightweight ap's. If you want autonomous ap's you need AP1242 or AP1131. Don't know what type of ap you have. You can convert LAP's to autonomous.
The ap will know of the DNS server from the DHCP Address.... if you were using DNS. Since you hard coded the AP, you don't need it now. Just like how users obtain an ip and know of thesir DNS servers.... same with the ap.
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
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 f...