02-22-2016 09:22 AM - edited 02-25-2016 12:46 PM
Good day all
I have three IAP units - 103, 104, 105. All run v. 220.127.116.11-18.104.22.168_50009. I manage them as a group.
Recently some clients that used to connect without error now fail to connect because "...the integrity check of the recieved message (MIC) has failed.". I see where reasons for this error are given as a) system congestion, b) hacking, or c) incorrect or outdated client settings/drivers.
I have two wifi SSIDs - Guest and Main. Guest runs through VLAN 4 and Main through VLAN 1.
I waited for the weekend when there were just three or four devices connected to wifi. I then used a Win7 and a Win10 endpoint both of which had started failing to connect. On the Win7 machine I manually created a new wifi connection and specified WPA2 with AES. That failed to connect. On the Win10 machine I rechecked the settings and tried again. That also failed. Interestingly the Win10 machine WILL connect to the Guest network.
I used putty and CLI to check that no DHCP errors were in the mix. I used debug pkt match mac, debug pkt mac XX:XX:XX:XX:XX, debug pkt type dhcp, and debug pkt dump. No traffic during the failed connect attempts as was expected.
I ran AP LOG ALL under support and see the MIC errors for the mac addresses, but not much else.
I am stumped here - any help would be appreciated. I trust this is just a "Doh!" moment for me.
Thanks for any thoughts or comments.
* I updated both Main and Guest networks change from strict WPA2 to WPA2 & WPA. I rebooted all IAPs.
----- no changes observed. Certain machines still get integrity check errors. Failing machines are mostly fully patched Dell or Microsoft Win10 devices.
* I used an iPhone6 that was attached to the Guest network and working correctly. I removed the connect on the phone using the Forget Network option. I then tried to reconnect to the Guest network.
----- the Aruba devices now complain that this device has an encryption problem and I see an entry in the Client table with 0.0.0.0 and the phone's MAC address, but no connection is registered on the phone