one or two port of x440-poe switch go down and come up


one or two port of x440-poe switch go down and come up for no reason, this happens frequently on all X-440P switches .......

Below is the power usage: 18W out of 170W
Firmware Status Power (Watts) Power (Watts) LegacyOperational
170 W 18 W Disabled

IOS Version: 15.4.1.3

What could be the reason, AP connected to the port losses communication with the controller causing the end user dis-connectivity.

4 replies

Userlevel 7
I don't think that this is a switch problem - if the AP looses the tunnel connection to the controller he'll reboot and start controller discovery from scratch.

It's easy to troubleshoot....
Just configure a SSID on the AP with a bridge@AP topology and a pre-shared key WLAN service.
In the AP proberties go to advanced and enable "Maintain client sessions in event of poll failure".

That will do the following - even if the AP looses the conncetion to the controller NO reboot will performed as the AP has the WPA key stored localy and will still provide service on this SSID.

-Ron
Ron wrote:

I don't think that this is a switch problem - if the AP looses the tunnel connection to the controller he'll reboot and start controller discovery from scratch.

It's easy to troubleshoot....
Just configure a SSID on the AP with a bridge@AP topology and a pre-shared key WLAN service.
In the AP proberties go to advanced and enable "Maintain client sessions in event of poll failure".

That will do the following - even if the AP looses the conncetion to the controller NO reboot will performed as the AP has the WPA key stored localy and will still provide service on this SSID.

-Ron

"Maintain client sessions in event of poll failure" is already enabled in ap properties, but still issue occurs



what about "restart service in the absence of controller".....is it fine if enabled.

We have open SSID's, no shared secret....
Userlevel 7
Ron wrote:

I don't think that this is a switch problem - if the AP looses the tunnel connection to the controller he'll reboot and start controller discovery from scratch.

It's easy to troubleshoot....
Just configure a SSID on the AP with a bridge@AP topology and a pre-shared key WLAN service.
In the AP proberties go to advanced and enable "Maintain client sessions in event of poll failure".

That will do the following - even if the AP looses the conncetion to the controller NO reboot will performed as the AP has the WPA key stored localy and will still provide service on this SSID.

-Ron

This option is only used if the AP has a SSID with bridge@AP topology with a WLAN service with either open/none or WPA-PSK because this two don't need the controller to allow clients to connect as open/none has no key and for PSK the key is stored in the AP.
Userlevel 7
Ron wrote:

I don't think that this is a switch problem - if the AP looses the tunnel connection to the controller he'll reboot and start controller discovery from scratch.

It's easy to troubleshoot....
Just configure a SSID on the AP with a bridge@AP topology and a pre-shared key WLAN service.
In the AP proberties go to advanced and enable "Maintain client sessions in event of poll failure".

That will do the following - even if the AP looses the conncetion to the controller NO reboot will performed as the AP has the WPA key stored localy and will still provide service on this SSID.

-Ron

https://gtacknowledge.extremenetworks.com/articles/How_To/How-to-Maintain-Wireless-Services-upon-an-...

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