we have cisco 1240 AP's managed via wlc's but our cisco 7921 phones are not getting any ip ..it says configuring ip ..dhcp timeout . i am not sure how i can troubleshoot this issue . our dhcp server is configured on core switch itself. now i know the problem i just need to know how to proceed .
Try to remove the dhcp proxy from the WLC and see if that helps. You need to be able to get dhcp from a wired client first before you can get the wireless to work. Makes sure you set an IP helper also. Maybe it's an issue with using the hsrp address. Try using the management of the switch.
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...