Wireless Access

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Regular Contributor II
Posts: 207
Registered: ‎09-28-2010

Controller losing connection

Is there a way to find out why a controller seems to intermittently drop off the network? 

 

I had a call about the wireless network seeming to drop off every 10 minutes or so.  Of course when I checked the controller and APs were up (uptime of 19 days), and ran a continuous ping to the controller with no drops for close to an hour.  

 

When I called the user it turned into a "one user couldn't connect" type of issue, although I did see some messages in the event log about our RADIUS server being unreachable.

 

As there were other users connected, I wrote it off as a user issue.

 

Of course approx 30 minutes later, the ping on the controller dropped.  Called user and the controller was up, but no link light on the Gig 1/8 port.   Verified cable, unplugged and plugged back in, still no light.  Checked Cisco switch and no issues on that port (uptime of 19 weeks).  Shut the port and no shut the port - still no link on the controller.   Had user pull power cord and replug......eventually controller came back up.

 

Continued to ping and eventually dropped the connection, but did come back up (missed about 20 pings).

 

Checking the event log, found these messages:

 

 

 

2017-06-2718:23:59Link 4105 is down. Admin status is 1; oper status is 2
2017-06-2718:23:59Physical port 1/8 is down. Admin state is 1 operational state is 2
2017-06-2718:23:59Link 20483 is down. Admin status is 1; oper status is 2
2017-06-2718:23:59VLAN 2 is down. Admin status is 1; oper status is 2
2017-06-2718:23:59VLAN 2 configuration has changed. Change type is 3
2017-06-2718:23:59Link 20484 is down. Admin status is 1; oper status is 2
2017-06-2718:23:59VLAN 110 is down. Admin status is 1; oper status is 2
2017-06-2718:23:59VLAN 110 configuration has changed. Change type is 3
2017-06-2718:23:59Link 20482 is down. Admin status is 1; oper status is 2
2017-06-2718:23:59VLAN 4095 is down. Admin status is 1; oper status is 2
2017-06-2718:23:59VLAN 4095 configuration has changed. Change type is 3
2017-06-2718:24:13Link 4105 is up. Admin status is 1; oper status is 1
2017-06-2718:24:13Physical port 1/8 is up. Admin state is 1 operational state is 1
2017-06-2718:24:47Link 20483 is up. Admin status is 1; oper status is 1
2017-06-2718:24:47VLAN 2 is up. Admin status is 1; oper status is 1
2017-06-2718:24:47VLAN 2 configuration has changed. Change type is 3
2017-06-2718:24:47Link 20484 is up. Admin status is 1; oper status is 1
2017-06-2718:24:47VLAN 110 is up. Admin status is 1; oper status is 1
2017-06-2718:24:47VLAN 110 configuration has changed. Change type is 3
2017-06-2718:24:47Link 20482 is up. Admin status is 1; oper status is 1
2017-06-2718:24:47VLAN 4095 is up. Admin status is 1; oper status is 1
2017-06-2718:24:47VLAN 4095 configuration has changed. Change type is 3
2017-06-2718:26:17Resource 1 :: Controlpath CPU has exceeded 45% threshold (actual:52%).
2017-06-2718:27:17Resource 1 :: Controlpath CPU has dropped below 45% threshold (actual:0%).

 

Is there anything I can do to see why the controller may be dropping out?   This is a 620 controller, running 6.4.2.3 firmware.

Guru Elite
Posts: 21,491
Registered: ‎03-29-2007

Re: Controller losing connection

I would upgrade to the latest 6.4.2.x and try again.  Since that controller is no longer being produced, users are less likely to report any issues.  If they are reported, it would be fixed in later versions of code...



Colin Joseph
Aruba Customer Engineering

Looking for an Answer? Search the Community Knowledge Base Here: Community Knowledge Base

Regular Contributor II
Posts: 207
Registered: ‎09-28-2010

Re: Controller losing connection

Thanks, I guess I'll just have to keep an eye on it.  It's a local controller, and I haven't had much luck with running those on different code than the masters.  Plus we are in the middle of an upgrade (new SSID push), so I don't want to add any other variables to the mix.

 

If it continues to happen I'll just have to send them a different 620 from the retired pile until executive approves them for a 7005.

 

We still have approx 150 620s, all running the same code, so I don't think it is a code issue.  Since the connectivity appears to eventually restore, I didn't know if the controller stored any information about the drop.

 

Is there anything to be had from the Link down, admin status, oper status information in the event log?

 

I had to wait until midnight to reboot the other networking equipment, just on the off chance that it was an issue with the switch.  Obviously it won't do me any good to replace the controller if there is another issue to be blamed.

Guru Elite
Posts: 21,491
Registered: ‎03-29-2007

Re: Controller losing connection

Nothing in the link up or down messages to note anything bad.  I would try switching the port to another, since you already switched the cables...



Colin Joseph
Aruba Customer Engineering

Looking for an Answer? Search the Community Knowledge Base Here: Community Knowledge Base

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