I have a new WRVS4400N. I have 5 users behind this router and it is controlling access to a Comcast Business network with 20 Mb downstream and 5 Mbit upstream. We are using a hosted SIP PBX with 4 phones. We also are using a hosted exchange email service via HTTPS. Finally, the only other service we use is simple web browsing. We are seeing periodic outages where the router drops all connections upstream for a few seconds. The RED Diag light stays on solid but the router continues to operate but in a very degraded mode (performance is VERY erratic and the device randomly drops ALL connections)
I have DISABLED the SPI fiewall, I have disabled DoS, I have enabled and disabled SIP gateway (we use an internal STUN service so we technically do not need it) and have disabled the IPS functions. I am running version 220.127.116.11 of the firmware. I continue to get issues. After resetting the router, things run fine for an hour or so before the problems begin again. This is now really causing issues with our voice not to mention other issues. Has anyone seen this issue before? What have you done to resolve it?