We have a Catalyst 6506-E running Native 12.2(18)SXF8. It is being deployed in a IPT environment and so we wanted to make sure that L2 security was implemented. We turned on DCHP snooping for VLANS X,Y,Z we also turned on ip arp inspection for X,Y,Z. We put the commands under the ports for rate limit for both. We also have the trusted command under the port that the DHCP server is plugged into.
When we have this configuration we are seeing random one-way audio calls between phones that ride on the same subnet and even same switch. If we take off DAI then everything works fine. The customer is running CCM 4.3(1) OS2003.1.1sr1 and the phones are 7941/61 with 8.2(2)sr1. Would like to know if anyone has seen this? If so is it a misconfig or bug?