The _ac virtual console is off and on on access points all around campus. When I ssh to the access points and ping either the gateway or any other ip, I will either get a response to all pings or none of the pings. If I get no response and ping again immediately, it responds to all pings. If I ping the AP in question from a pc on the same mgt network, it responds the entire time and I never lose my ssh connection. Right now the access console is set to broadcast if the default gateway is is missed twice. What are your ip tracking settings?