The all the wireless access points at this building are dropping traffic during the overnight. In looking at our monitoring tools we can see that all of the APs CPU level spikes to 90-100% during the timeframe that traffic is being dropped. Both the hard wire LAN interface and the RF interfaces utilization is very low, no reason for traffic to be dropped, IE appearance that the traffic is being dropped because the AP is too busy internally.
The APs are connected via a dot1.q trunk to cisco 2948 switches. There are only 2 vlans on the APs, so on one switch port that one AP was connected to we added the config to block all vlans except for these two:
clear trunk 2/48 2-249,251-999,1025-4094
set trunk 2/48 on dot1q 1,250,1000-1005
Afterwards this specific AP did NOT have its CPU spike and it did not drop traffic. We do not have this issue in any other building and thus suspect there is a bigger problem with trunking/VTP domain.
Attached is a word doc with screenshots showing the problem, one of the access points and the switch that the access point is connected to.
Thanks for your help!! ~ Phil