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New Member

AP interface Dot11Radio1 keeps flipping

I have 10 Cisco 1140 APs, all configed on one 5505 controller.  And I just found all those APs keep getting below logs                  

*Mar  2 03:12:23.467: %LINK-3-UPDOWN: Interface Dot11Radio1, changed state to down

*Mar  2 03:12:23.489: %LINK-3-UPDOWN: Interface Dot11Radio1, changed state to up

*Mar  2 03:15:24.808: %LINK-3-UPDOWN: Interface Dot11Radio1, changed state to down

*Mar  2 03:15:24.830: %LINK-3-UPDOWN: Interface Dot11Radio1, changed state to up

*Mar  2 03:18:25.236: %LINK-3-UPDOWN: Interface Dot11Radio1, changed state to down

*Mar  2 03:18:25.257: %LINK-3-UPDOWN: Interface Dot11Radio1, changed state to up

*Mar  2 03:21:26.090: %LINK-3-UPDOWN: Interface Dot11Radio1, changed state to down

*Mar  2 03:21:26.112: %LINK-3-UPDOWN: Interface Dot11Radio1, changed state to up

*Mar  2 03:24:27.802: %LINK-3-UPDOWN: Interface Dot11Radio1, changed state to down

*Mar  2 03:24:27.823: %LINK-3-UPDOWN: Interface Dot11Radio1, changed state to up

*Mar  2 03:12:23.467: %LINK-3-UPDOWN: Interface Dot11Radio1, changed state to down

*Mar  2 03:12:23.489: %LINK-3-UPDOWN: Interface Dot11Radio1, changed state to up

*Mar  2 03:15:24.808: %LINK-3-UPDOWN: Interface Dot11Radio1, changed state to down

*Mar  2 03:15:24.830: %LINK-3-UPDOWN: Interface Dot11Radio1, changed state to up

*Mar  2 03:18:25.236: %LINK-3-UPDOWN: Interface Dot11Radio1, changed state to down

*Mar  2 03:18:25.257: %LINK-3-UPDOWN: Interface Dot11Radio1, changed state to up

*Mar  2 03:21:26.090: %LINK-3-UPDOWN: Interface Dot11Radio1, changed state to down

*Mar  2 03:21:26.112: %LINK-3-UPDOWN: Interface Dot11Radio1, changed state to up

*Mar  2 03:24:27.802: %LINK-3-UPDOWN: Interface Dot11Radio1, changed state to down

*Mar  2 03:24:27.823: %LINK-3-UPDOWN: Interface Dot11Radio1, changed state to up

All those APs have two Radio interfaces, setup by default, Radio 0 is 802.11b/g/n, and Radio 1 .11a/n.

what is this? should I disable Radio interface 1?

Big Thank.

  • Getting Started with Wireless
26 REPLIES
Hall of Fame Super Silver

Re: AP interface Dot11Radio1 keeps flipping

Is there anything else you see in the logs besides this?

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New Member

AP interface Dot11Radio1 keeps flipping

nothing else outstanding.

Hall of Fame Super Silver

Re: AP interface Dot11Radio1 keeps flipping

This can be DFS shutting down the radio, but you would see radar in the log. Here is a link of DFS.

https://supportforums.cisco.com/docs/DOC-13661

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VIP Purple

AP interface Dot11Radio1 keeps flipping

I suspect, you may have a faulty radio.

Regards

New Member

AP interface Dot11Radio1 keeps flipping

But all my ten 1140 APs have the same problem.

Hall of Fame Super Silver

Re: AP interface Dot11Radio1 keeps flipping

Well if your seeing this and your not hitting DFS then open a RAC case so they can further investigate.

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New Member

AP interface Dot11Radio1 keeps flipping

'hitting DFS'?  did you mean the DFS event?

this is the DFS events on one of my 1142s. Its radio if 1 is flipping as well.

DFS Statistics:

Radar Detected:         1
Inactive Radar Detected:0
RSSI Threshold Reached: 0
PW Threshold Reached:   0
PRI Threshold Reached:  0
Event Count:            1651
Chirp Count:            4
Max PRI Count:          3
Max Used PRI Bins:      4
Excess PRI Bins:        0

Should I just simple shut down Radio 1 on all my APs?

Hall of Fame Super Gold

AP interface Dot11Radio1 keeps flipping

Can you plase post the output to the command "sh interface dot111"?


Also, please post the output to the command "dir".

Re: AP interface Dot11Radio1 keeps flipping

I agree with Sandeep, with the radio bouncing every three minutes could point to a bad radio.

Steve

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