Hello,
I have a very strange scenario with 2504 WLC. It is deployed as an Anchor with 5508 as the foreign. In summary, my set up is as follows:
2504 - Anchor (version 7.6.120), Port 1- MGT, Port 2 - Guest subnet, No AAA Server, Internal DHCP server
5508 - Foreign (version 7.6.101.1, Guest interface (dummy, non-routable and no vlan on switch), MAC filtering, ACL-redirect, AAA with Radius NAC.
The mobility tunnels are up and FW rule also allows DNS and TCP/8443 from the guest subnet. The guest client receives its DHCP address and queries external DNS on the DMZ, but after that nothing happens. The web redirect URL times out.
I can see hits on the FW ACL for the DNS query and response but none for TCP/8443. The client browser times out. From wireshark, I can see the client query the DNS for the ISE hostname and the DNS replies with the IP address, but I don't see the guest send a packet to ISE. It's as if the DNS packet flows through the Guest interface, but the TCP/8443 packet doesn't flow out of the Anchor WLC to the Foreign to be sent to ISE.
Please does anyone understand this very strange occurrence.