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3850 switch wireless controller vrf issues


  I hope some lone may be able to help with this

we have a couple of wireless APs connecting to a Cisco 3850 switch. The APs are connected on VLAN 100 which is assigned as the management VLAN for the wireless controller.

Everything worked fine until we tried adding the VLAN into a VRF. Since doing so the APs claim they can't see the controller

We have configured DHCP for the VRF and they get addresses

we have tried manually configuring the APs

we can even ping the IP address of the interface from the AP.  But they still claim not to  see the controller

We have tried in a lab environment and see the same results

has anybody got any ideas?