Controllerless Networks

Hi,

I'm new to Aruba and I am testing a 105 in order to fault-find a problem a customer has using our hand-held computers when in an Aruba IAP environment. I have a 105 here which was working fine but after I upgraded the firmware to 6.1.3.4-3.1.0.0_35320 is is now showing the CPU at between 50% and 100% pretty much all the time. Previously it was sitting at about 5%-10%.

 

Previously I had a single network with a single client using WPA2 Personal but with the new firmware even with no networks we are still maxed-out.

 

I was looking to find either a reason for this huge CPU usage or a way to go back to an older versionof the firmware.

I should add that the AP is pretty much at default.

 

Does anyone have any ideas?

 

Many thanks,

Chris

 

 

 

chrismower,

I would recommend you to open a support case for this.

Thanks,

I have the same issue with IAP-105s in our lab.  It appears to be intermittent (but frequent) and only on the IAP that is acting as the VC.  After upgrade the GUI is very slow to unusable.  A show cpu on the console shows the "user percentage between 45 and 99% utilization. Memory is consistant at 65-69mb free.  Show log user provides no out of place errors. 

 

I am using 2 IAP-105 ROW APs.  One is over a wireless mesh. I am usually unable to access the network during this time.  For me each episode has lasted between 3 and 30 minutes.  I have tried reboots and factory resets.  Even with a minimal config the issue persists. Downgrading to 6.1.3.0 does correct the issue.  The issue did seem more difficult to reproduce with only one IAP.

That sounds exactly like the scenario I am seeing but with just one AP. The Web interface is almost unusable as it can take a minute just to refresh the page.

 

How did you manage to reflash the firmware as I don't seem to be able to find where the older versions are kept?

 

You can find the Aruba Instant releases on the support site
http://support.arubanetworks.com/DOWNLOADSOFTWARE/tabid/75/DMXModule/510/EntryId/8722/Default.aspx

If the webUI is unusuable, you can upgrade using the CLI using any of the 3 protocols
FTP / TFTP / HTTP

An example of upgrading using tftp :
#upgrade-image tftp://<tftp-ip-addr>/<file-name>

Disabled the MAS integration and check if this help. Goto Settings > MAS Integration > Disabled > Apply.

 

Share  the "show cpu" output, Goto

 

Support > Show CPU Utilization > (Select the Access Point) > Run

 

 

It looks as if disabling MAS Integration is the key to dropping the CPU utilization here. It is now down to a more manageable 19% on average. It is still not as responsive as the old firmware was but the CPU running at 100% seems to have stopped.

 

Thanks everyone for the help.

 

I'm experienceing the exact same issue. I'm going to try disabing MAS integration as recommended. Let you know if it works for us as well.

I may have spoken too soon when I said that disabling MAS integration was the fix since I tried to connect to the AP this morning and it was running slow again with the CPU at 100% for most of the time. I found that MAS Integration had reset to being on again for some reason so I turned it off, but the Ap is still running slow with CPU usage running between 50% and 100%.

 

I think I will try taking the firmware version back down a level.

This gets stranger by the minute. The CPU graph is showing the CPU utilization at 40% (see Capture1.jpg) but when I run the Support->AP CPU Utilization it shows it at about 99% idle.(see Capture2.jpg)

 

The lack of web interface response tends to suggest that the 40% is correct but why then should the ps (I'm assuming) output be saying 98% idle?

 

 

On another and possibly related note, it would appear that no matter what task you put in the Support->Command drop down box, when you press run it just gives the results of the AP CPU command (or possibly the first command it saw as that was what it was in this case).

 

 

 

Capture1.jpg

 

 

Capture2.jpg

 

I'm seeing the exact same thing......  Anyone resolved this yet?

We'll check on where we are with an update on this issue and get back to the community soon.

 

Thank you!

Jeanie

Some further information. CPU graph showing the IAP starting, trying to connect to the web interface, disconnecting and re-connecting.

Some more information.

 

I re-set the AP to default then connected to 'instant' via wireless and opened a browser connection. The AP responded without undue delay. I then opened a LAN connection to the AP and the CPU usage shot up and the LAN browser was very slow and unresponsive for several minutes. I then logged-off on the LAN browser whereupon the CPU usage dropped back and when re-conneced the CPU shot back up again.

 

This is all shown in the screen capture below. It seems to me that the browser interface on the wired LAN side seems to be taking up an enormous amount of CPU.

 

 

Chrismower,

 

If you haven't, please contact support.  There are the ones that can look into your issue.

 

I am working with support at the moment. I am just uploading this for them as a convenient place to put the info.

If you want to make sure it is dealt with, please make sure that you upload the files and pictures to your case at support.arubanetworks.com.  When they open the case notes, they do NOT see this website and that may delay resolution of the case.

 

 

There is a slight problem as I have a case number but I don't know what to do with it. Where do i go?

If you have not, you can request an account at https://support.arubanetworks.com/Default.aspx?TabId=55  You will then be able to  open, manage cases and upload support files right from the website.

 

 

Yes, I saw that but it says that it is for Arubacare customers or resellers and we are neither. I am working on this issue for one of your customers here in the UK. I can give the details in a private mail but I would not be able to register as far as i can tell.

You can ask whoever you are dealing with in support, but please make sure that your files are emailed to whoever you are dealing with so that they have the most current version of your information.

 

We do not want the resolution to your issue to be delayed.

 

 

I am working with Vasanth Selvaraj on this case so hopefully we should be able to resolve the issue. I spoke to him today and he has seen the images I uploaded. I am waiting to hear back from him shortly I hope.

 

Hi Chris

 

If you would please be so kind as to continue posting your findings, as it may just help the wider comunity troubleshooting.  Thanks in advance :)

 

Regards

Robbie

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@chrismower wrote:

I am working with Vasanth Selvaraj on this case so hopefully we should be able to resolve the issue. I spoke to him today and he has seen the images I uploaded. I am waiting to hear back from him shortly I hope.

 

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Glad to hear that you have a case open.  Post away.

 

Chris,

Thank you for providing the login details to your IAP. I tried to login to the webUI through Internet Explorer and did not observe the CPU spike.

As soon as I switched to Google Chrome, I saw the CPU spike.

Could you please let us know which browser you are using?
Thanks,

OK, this is pretty wierd. It would appear that the reason that the CPU on the IAP is maxing out is because the browser used is Chrome! I have carried out a number of tests and they bear this out. (See below)

 

I am doing OmniPeek captures to see if I can get a handle on why the browser should have such a dramatic impact on the performance of the AP. I suspect it is due to traffic between the browser and the web server.

 

Can others test this out?

 

I had the same issue using OSX Safari.........

Any solution for this issue found?  Having the exact same problem....

 

Grant

 

There is a new version of instant code, 6.1.3.4_3101.  I would try that version to see if the issue still exists in that code.

 

No go....soon as you connect with Chrome, the interface slows to a crawl and CPU spikes.

 

The issue with Chrome will be fix in the next software release, schedule to release by end of Dec.