All RAPs and MAPs (through the RAP) send a keepalive message to the controller, typically every 30 seconds.
If this process fails, you get this message.
The reason why this fails is basically because your MAP cannot get in touch with your controller in due time. This is the easy answer.
Now why is that? This is harder to determine. There is something that prevents your MAP from communicating in good conditions with the controller. This communication occurs through the backhaul, so logically on the 802.11a spectrum, but when the AP fails to reach the controller, the WLC sees the whole AP (therefore both radios) going down.
- verify that this message is only about the MAPs, thus limiting the issue on backhaul communication problems. If the issue shows also on the RAP, you have a bandwidth issue on your LAN as well.
- Check the backhaul parameters, through the controller or WCS. It may be that you have bandwidth issue at the RAP level (check the RAP utilization on 802.11a). It could also be that your default data rate on the backhaul is too high (check packet loss rate on your MAP 802.11a, and reduce the backhaul speed accordingly). Could also be that you have interference issues...
Thanks. It was really helpful. I think the issue with my network is LAN bandwidth. I have to check it out though coz there are no problem of 5 GHz interference in the area and backhaul SNRs of Mesh APs are also quite reasonable.
What should be the data rate setting on backhaul links. currently its set to 24 Mbps?
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...
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. Prerequisites: Powershell SNMP Module
(Install-Module -Name SNMP) SNMP Write Access to y...