CDP not working for most switches in WCS 6

[shocke]

Running WCS 6 and WLC's at 6, wcs does not show cdp neighbours for the access points except on two access points (see attached image).

One of the access points is a lwapp and the other is autonomous.  If I telnet to the switch and look at the cdp neighbours it does show me neighbours.       I have looked at the switch configs and do not see anything really different between a switch that is working and one that is not.  Any ideas?

Also Switch Port Tracing does not work for me, perhaps this is because of the same problem?

Thanks!

Eli

[tkhan]

Make sure your switchports are void of any trunking commands.  I had this issue before and realized that during the migration from IOS to LWAPP, a "switchport trunk encap dot1q" command was left on the ports by the guys doing the migration.  Once I removed it, CDP started working on WCS views.

...Ty

[sschmidt]

That was indeed the issue.  We worked on this in a TAC case.  Good call.

[sin]

I have the exact same problem. The seeing cdp neigbors when the AP is on a trunk is not possible. Why? Any links do documentation about this?