I just dug myself into a hole. We have Cisco Prime 2.0 installed with a handful of 5508 WLCs. I am trying to troubleshoot issues with client's losing connectivity. And I have found AP's with high channel utilization but low interfence and zero clients associated. Then I found AP's that have passed the Noise Profile but failed the Interference Profile. I am getting to confused as to what these all mean. I read definitions on each and its all jumbling together.
From what I thought, this is what each means:
CU - traffic the radio can understand that's not being generated by itself or clients associated.
Interference - signals on the same channel
Noise - signals on the same channel that are not understood at all by radio
Can someone explain in layman's terms what the difference is between channel utilization, interference and noise?
Also, any tips on useful Prime alarms for monitoring a wireless network would be helpful as well.
In regards to your clients loosing connectivity, you need to do basic troubleshooting.
1. Determine the signal strength of the SSID by looking at the client. You also need to verify the signal strength from the view of the WLC. 2. How about the client's wireless NIC drivers? Are they updated? 3. Is this issue observed with other clients or just one client? 4. Is this issue affecting similar clients, i. e. all Android, Apple, Windows, Intel chips, etc. 5. What is the location of the client vs the nearest AP? 6 What is the location of the client vs the AP the client is currently associated to?
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
Please feel ...
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...