I am using a 3750 switch. We just added some Avaya equipment but they do not show up on the switch's ARP table or Mac-address table. I have tried adding a static ARP entry, and it shows up on the table, but I am still unable to ping the device. I am also unable to perform a successful mac traceroute on it either. I am at a loss, I was told this is because a lot of the newer VoIP devices do not give out their MAC Address to prevent Man in the Middle attacks. Any ideas on how I can get it's MAC address into the switch and have it work? The cables are good, and the port is showing in the up status.
I have this problem too.