We run Cisco 1121G's autonomous AP's with WPA enterprise. We also run 7920's using WPA enterprise with no issues. However, the 7921G's drop periodically and while roaming. The phones are set to run on seperate VLAN from data. Does anyone know of bug or issues that would cause this scenario?
A call could potentially get dropped if you have CAC (TSPEC) enabled and the AP refuses the connection.
You should also see "Network Busy" message on the phone.
We have seen some issues w/ responses getting to the client when the utilization is high as well. Also 188.8.131.52 can help here as well.
Should be able to check the CAC stats on the APs.
However, since autonomous APs do not support load based CAC, we suggest not to enable CAC as it doesn't give much benefit as it doesn't account for non-802.11 energy or other 802.11 cells or clients on other APs utilizing the same channel.
Also if you are running 5 GHz, there was an issue that the phone wouldn't roam to other AP candidates if it received a CAC refusal (fixed in 1.1.1).
Thank you for the repsonse. I have had several "Network Busy" error messages. We have upgraded the firmware on the 7921 to 1.1.1 and I am still having the issue. Can you clarify the what you mean by CAC?
Will only get the "Network Busy" message on the phone if you have CAC enabled.
For dropped calls, could be other issues due to roaming. Not sure if you are doing L3 roaming or not. If so, enable symmetric tunneling on the controller ans ensure the mobility groups are configured correctly.
Transferring Crash file from standby:
Login to the Active WLC in HA.
(Cisco Controller) >transfer upload datatype crash
(Cisco Controller) >transfer upload filename <Desired filename>
(Cisco Controller) >transfer up...
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
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I have created a Powershell script to automatically add a Wireless Guest User on Cisco WLCs. (tested on 2500 Series)
The script should be completely self explanatory.
Powershell SNMP Module (Install-Module -Name SNMP)
SNMP Write Access to...