IPSEC error: Received a non-IPSEC packet

[J_Vansen_S]

Hi all

Below is my network setup. Using a Wireless Lan Controller and a Lightweight AP as its end point. Between the Router and ASA is an IPSEC tunnel

WLC---Router(==VPN==)ASA---AP

From my AP segment, i am able to ping to my WLC. Apparently the AP need to pass udp traffic to register itself to the WLC. Unfortunately i got this error msg

IPSEC: Received a non-IPSec (protocol=udp) packet from 172.16.8.4(AP) to 172.16.52.2 (WLC).

I have already allowed ACL of any any udp connection & also enabled split tunneling to include AP's traffic.

What did i miss out?

[amritpatek]

This message is displayed when the received packet matched the crypto map ACL, but it is not IPSec-encapsulated. The IPSec Peer is sending unencapsulated packets. This error can occur because of a policy setup error on the peer. This error is the reason why the reverse-path authentication is getting failed.