MAC to IP resolution between Wireless Controller and NAC

[Joshua_Beddingf]

We are having trouble with guests completing the captive portal registration on the NAC. This is apparently a MAC-to-IP resolution issue between the EWC and the NAC. The subnet for the captive portal is 10.200.x.x and the DHCP is handled by the EWC's onboard DHCP for the topology.

I doing something wrong because the NAC is not resolving these addresses therfor they connot complete registration. The information from the switches resolves perfectly but not from this "guest" subnet. I am sure there is a check box somewhere I am missing, any help?

[Joshua_Beddingf]

SNMPv3 is configured and working. I will check the logs

[Matthew_Hum]

The EWC should be sending it over, but an additional ip-helper wouldn't hurt.
Please verify SNMPv3.
you can further check the logs on NAC to identify why IP-to-MAC resolution is failing.

[Joshua_Beddingf]

The local DHCP server in the EWC is providing IP Adresses. Would the ip-helper still be useful? I assume the NAC would be "sniffing" dhcp traffic.

[Joshua_Beddingf]

"If I unterstand that correctly you can't ping the guest client from the NAC - correct ?"
Not sure what I said that led you to think this. I can ping clients from the NAC.

"Do you use the main interface on the NAC for the guest auth"

Yes. We use the main interface. Would using a secondary interface improve performance?

[Ronald_Dvorak]

If I unterstand that correctly you can't ping the guest client from the NAC - correct ?
If that is that case - have you configured a IP route on the NAC to reach the guest subnet.
Do you use the main interface on the NAC for the guest auth or did you enabled the 2nd NIC for it.