I have had my WRVS4400N router for almost 2 years now and recently the wireless connection has become very unreliable. I have to reboot every 24 - 72 hours when the wireless network SSID disappears or becomes unresponsive (i.e. appears, but nothing can connect).
I have upgraded to the latest firmware (1.1.13), without any improvement. The only factor I can correlate to the unreliability is that a new MacBook Pro has been connecting for the past couple of months (roughly how long this has been going on). However, there is no information at all in the local logs, so I have no way of verifying this hypothesis (nor should this be the case as everything has up to date software/firmware).
I have also tried using a different wireless channel with no change.
I was using a static DHCP address for 1 computer (based on MAC), and have since discontinued using this feature. It seemed to help slightly in that it now goes 2 days instead of 1, but I think this is probably more coincidence than anything else.
Computers not on wireless are still able to connect to each other and the internet fine. However it does seem that if I do not reset the wireless (i.e. router) in a timely manner, then eventually the entire router does lock up and requres a "hard" boot (power cycle).
Any thoughts or suggestions would be appreciated as this is an increasingly frustrating situation!