Problem Native Vlan mismatch + impossible to connect to wifi

[Xavier RICOL]

Hello,

We have problems with a SF300-24P. In the log there are a lot of warnings:

%CDP-W-NATIVE_VLAN_MISMATCH: Native VLAN mismatch detected on interface gi2.

And sometimes:

%CDP-W-NATIVE_VLAN_MISMATCH: Native VLAN mismatch detected on interface gi2., aggregated (1)  

I'm not on site, so i can't plug in console mode.

I don't know if it's linked, but we have a lot of difficulties to connect to the wifi networks connected to this switch. It asks the key, but even if the key is correctly put, it refuses it and disconnects the wifi networks.

It's connected to 16 WAP561 Wireless-N. 

Version of the switch:

And of the WAPs:

Cedric

[Xavier RICOL]

On the log of the WAPs there are a lot of messages like this:

[shared_config] their(172.25.10.22) key is better than our(172.25.10.17) key, fetching their data

Cedric

[Xavier RICOL]

I saw the same messages on all the AP except those with .22 ip adress. I rebooted it, and same messages again. And always difficult or impossible to connect to wifi networks.

[blandekic]

Maybe this link will help?

https://supportforums.cisco.com/document/11531/frequent-cdp-4-nvlanmismatch-or-cdp-4-nativevlanmismatch-syslog-6500

[jbattist]

Hello Xavier RICOL,

      Sorry the devices are not functioning as expected.  For the mismatch VLAN issue, can you let us know what VLANs are configured on the switch, is port gi2 configured as a trunk, access, general port and what VLAN(s) are associated to it.  And what is the device connected to gi2, and its port configuration?

As for not being able to connect to the SSID's, what devices are you attempting to connect, Iphones, MACs, PC's?  Is the SSID set to use "N" speed?  If so, IO see they are on the latest firmware, can you try disabling MPF and see if it has any effect in connecting?  The steps are below:

"This option is located where you configure the SSIDs (so Wireless->Networks then there's a link under each SSID to "Show Details"), but it ONLY appears if you disable WPA-TKIP.

If it is set to "Capable" (the default) then the WAP will expect clients that advertise they support it to have to use it. If set to “Required” then only wireless clients that can use MPF will be allowed on this SSID. If set to “Not Required” – self-explanatory.  I would set this setting to “Not Required”"

If they need TKIP enabled, go thru the steps to disable MPF, and then go back and just enable TKIP.  Hope this helps.