There may two antenna connections on the device, but they are usually used for "diversity;" meaning that only one antenna is live at a time. If you tried two yagis, one antenna or the other would be unused at any given time .... netowrk performance (which is already a little slow because of the repeater - 50%) would suffer even more.
Shut down one antenna connection and put in an omni (there are several omnis with some gain) and use directional antennas at the endpoints to aim at the central repeater site.
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...