I’ve been seeing this issue now over multiple routers (core, balance 20, etc).
When we use it for SIP traffic, every couple of weeks the SIP traffic will all of a sudden stop and the phones report a 408 timeout to the server. The server is pingable and all other services are fine, just no sip traffic can pass. Rebooting the router clears it for another couple of weeks.
Anyone seen anything like this?