Our network has been experiencing intermittent issues the last few days. At random times, the network becomes unstable, voip, citrix connections to servers, connections to the internet, vpn connections, etc;.
I started watching the logging on the ASA and saw that at random times the inside interface(which is also the default gw for the lan) would "flap", or go down and come back up 3-4 times very rapidly. It appears that this is what is causing the network instability. I haven't seen any other issues.
Our ISP (Verizon) ran diagnostics and said they just saw a larger than normal amount of utilization on our T1.
What could cause an internal interface on an ASA to behave like that?