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no bss info at Access Point


Userlevel 4
One on th Ap's has no BSS info after losing
connection with the controller.

AP is approved and Wlan’s are connected.

Whats wrong ?

19 replies

Userlevel 4
Hi Johan,

Is the AP local or foreign to the controller?

- Sam
Userlevel 4
Sam wrote:

Hi Johan,

Is the AP local or foreign to the controller?

- Sam

Article for reference:
https://gtacknowledge.extremenetworks.com/articles/Solution/Access-Point-radio-is-not-showing-a-chan...
Userlevel 4
Sam wrote:

Hi Johan,

Is the AP local or foreign to the controller?

- Sam

Local
Userlevel 4
Hi,

From the screenshot i see no channel and power selected for the AP.
Is it a new AP?

Regards,
Nathiya M
Userlevel 4
Nathiya Munuswamy wrote:

Hi,

From the screenshot i see no channel and power selected for the AP.
Is it a new AP?

Regards,
Nathiya M

No it isn't a new one. It was working fine till it lost the connection.
Userlevel 7
Nathiya Munuswamy wrote:

Hi,

From the screenshot i see no channel and power selected for the AP.
Is it a new AP?

Regards,
Nathiya M

is the AP green in the "AP availabilty" report
Userlevel 4
Nathiya Munuswamy wrote:

Hi,

From the screenshot i see no channel and power selected for the AP.
Is it a new AP?

Regards,
Nathiya M

Yes it is.
Userlevel 7
Nathiya Munuswamy wrote:

Hi,

From the screenshot i see no channel and power selected for the AP.
Is it a new AP?

Regards,
Nathiya M

is the AP on the same location/subnet as the controller or remote via i.e. VPN
Userlevel 4
Nathiya Munuswamy wrote:

Hi,

From the screenshot i see no channel and power selected for the AP.
Is it a new AP?

Regards,
Nathiya M

The ap is on a remote site via VPN
Userlevel 4
Nathiya Munuswamy wrote:

Hi,

From the screenshot i see no channel and power selected for the AP.
Is it a new AP?

Regards,
Nathiya M

Johan,

I'd advise getting a case open with GTAC so that the AP config logs etc can be looked at.

- Sam
Userlevel 7
Nathiya Munuswamy wrote:

Hi,

From the screenshot i see no channel and power selected for the AP.
Is it a new AP?

Regards,
Nathiya M

What's the MTU that you've set on the AP.
Userlevel 4
Nathiya Munuswamy wrote:

Hi,

From the screenshot i see no channel and power selected for the AP.
Is it a new AP?

Regards,
Nathiya M

The MTU is 1500
Userlevel 3
Nathiya Munuswamy wrote:

Hi,

From the screenshot i see no channel and power selected for the AP.
Is it a new AP?

Regards,
Nathiya M

try to set a lower mtu in ap static configuration e.g. 1300
the wassp tunnel from ap to controller has DF bit set, which makes problems in WAN/VPN environments
Userlevel 4
Nathiya Munuswamy wrote:

Hi,

From the screenshot i see no channel and power selected for the AP.
Is it a new AP?

Regards,
Nathiya M

That was the solution.
Userlevel 7
Unfortunately you can't trust the green AP in the "AP Availability" report in case the AP is connected via VPN tunnel / tunnel with lower MTU.

The only thing that shows the correct info in my experience is the controller log.

If the tunnel MTU is not set correctly the last message (bottom to top) during the AP authentication is missing in that case.

So if you run into an issue with a remote AP always check whether you'd find the "blacklist success..." message in the log.

Userlevel 3
Ron wrote:

Unfortunately you can't trust the green AP in the "AP Availability" report in case the AP is connected via VPN tunnel / tunnel with lower MTU.

The only thing that shows the correct info in my experience is the controller log.

If the tunnel MTU is not set correctly the last message (bottom to top) during the AP authentication is missing in that case.

So if you run into an issue with a remote AP always check whether you'd find the "blacklist success..." message in the log.



when looking at the report Wireless AP Availability
have a look at the uptime displayed for the AP
if there is a uptime displayed, the tunnel from AP to controller should be up
Userlevel 3
Dear Extreme Networks Employees,

in our setup almost every AP is connected over WAN/VPN.
when deploying new aps, the get the default settings provided in AP->Global Configuration
but there is no Global Setting for Tunnel MTU
so this setting has to be done on every AP manually

is it possible to make a global configuraton for Tunnel MTU?
Userlevel 4
Anton Sax wrote:

Dear Extreme Networks Employees,

in our setup almost every AP is connected over WAN/VPN.
when deploying new aps, the get the default settings provided in AP->Global Configuration
but there is no Global Setting for Tunnel MTU
so this setting has to be done on every AP manually

is it possible to make a global configuraton for Tunnel MTU?

Hi Anton,

If you go to AP on the top menu in the Gui, then APs from the side menu > select all APs to be configured > actions > multi-edit > scroll down to static configuration. There you will find Tunnel MTU.



Hope this helps.

- Sam
Userlevel 3
Anton Sax wrote:

Dear Extreme Networks Employees,

in our setup almost every AP is connected over WAN/VPN.
when deploying new aps, the get the default settings provided in AP->Global Configuration
but there is no Global Setting for Tunnel MTU
so this setting has to be done on every AP manually

is it possible to make a global configuraton for Tunnel MTU?

Thank you Sam, that helps so I don't need to set it an every ap, but it is an additional step. if the tunnel MTU would be a global setting then there would be no additional step.
BR Anton

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