Sudden Connectivity Loss:Interface Virtual-Dot11Radio0 down

[bstettle]

Hi,

we are using 350 on a underground train system, however we receive strange error messages on all access points. When this happens, connectivity to trains is lost for up to several minutes.

Following extract is from a train station. There are no VLANs configured. Trains are not actually leaving but waiting in the station.

1 Mar 1 22:44:44.961 Notification Line protocol on Interface Virtual-Dot11Radio0, changed state to up

2 Mar 1 22:44:43.984 Information Interface Dot11Radio0, Station 0800.1902.0334 Associated to Parent 0009.7cd4.a54b

3 Mar 1 22:44:43.980 Information Interface Dot11Radio0, Station 0800.1901.efdf Associated to Parent 0009.7cd4.a54b

4 Mar 1 22:44:43.980 Information Interface Dot11Radio0, Station 0800.1901.ea0e Associated to Parent 0009.7cd4.a54b

5 Mar 1 22:44:43.980 Information Interface Dot11Radio0, Station 0800.1901.c9a5 Associated to Parent 0009.7cd4.a54b

6 Mar 1 22:44:43.975 Information Interface Dot11Radio0, Station 00e0.4c39.0529 Associated to Parent 0009.7cd4.a54b

7 Mar 1 22:44:43.959 Error Interface Virtual-Dot11Radio0, changed state to up

8 Mar 1 22:44:43.955 Information Interface Dot11Radio0, Station WB_Train_2 0009.7cd4.a54b Reassociated KEY_MGMT[NONE]

9 Mar 1 22:42:51.829 Notification Line protocol on Interface Virtual-Dot11Radio0, changed state to down

10 Mar 1 22:42:50.827 Error Interface Virtual-Dot11Radio0, changed state to down

11 Mar 1 22:42:50.823 Information Interface Dot11Radio0, Deauthenticating Station 00e0.4c39.0529

12 Mar 1 22:42:50.823 Information Interface Dot11Radio0, Deauthenticating Station 0800.1901.c9a5

13 Mar 1 22:42:50.819 Information Interface Dot11Radio0, Deauthenticating Station 0800.1901.ea0e

14 Mar 1 22:42:50.819 Information Interface Dot11Radio0, Deauthenticating Station 0800.1901.efdf

15 Mar 1 22:42:50.819 Information Interface Dot11Radio0, Deauthenticating Station 0800.1902.0334

16 Mar 1 22:42:50.819 Information Interface Dot11Radio0, Deauthenticating Station 0009.7cd4.a54b Reason: Disassociated because sending station is leaving (or has left) BSS

17 Mar 1 22:42:50.815 Information Station 0009.7cd4.a54b Roamed to 0009.43ab.0a20

Any thoughts?

Thank you very much

Beat

[mchin345]

Seems like a radio problem, try replacing the AP to check if any of the APs are in bad condition.

[bstettle]

Thanks, unfortunately we have the same problem on all 8 Access Points. Could it be a software bug? Anyone else ever experienced similar behavior?

Beat

[gamccall]

I've had similar experiences, intermittently. Usually just one AP will lock up, and rebooting it will clear the problem, but I've had an entire library lock up at once. It does seem to be radio-related, because changing channels seems to prevent recurrence.

-Gabriel