Occasionally our LAN stops resolving host names. We have no idea why this happens. How can we diagnose these issues?
We have two routers. One is connected to the internet (via a fiber modem). The other one is set up as a wireless switch. i.e. it serves the internet via the first router, but it is in a different room and is used for Ethernet connections to computers in that room.
The issue seems to stem from the first router (or something else). I doubt its the switch router, or any issue with config across the network. This is because we usually type
http://home to get to the router config for the internet connected router, but this isn't working. However, we can type in the IP address and get to the config page. This happens whether we are connected to the original or the switch router.
Similarly we have a web server on the lan which we normally use the hostname of the computer to access, which we cannot do over the network (again the ip address works though).
Similarly pinging the IP addresses on the network works, but host names don't.
I am not aware how we fix this, if at all. We normally restart the routers and such and they come back. This time they haven't though, so I am looking for a little more insight as to why this may be happening.