Router won't connect after broadband downtime?

nitromaster

edit: never mind, all good!
To sum up, there's network here. Internet apparently went down locally on Friday evening, and the internet won't work since. It's an eircom/zykel router. It works if you manually connect just a computer to it (and not have it connected to the network), wifi also works in this case, so its not an internet problem.

There's a switch set up between the router and server/computers. When the router is connected, there's no luck pinging between the server + network, there also seems to be no luck pinging between the server/pcs :eek::eek:

I've been told absolutely nothing has changed setup wise, except for Eircom's internet going down locally on Friday evening pre-problems. Not very familar with the set up here. Any ideas on what I could do troubleshooting wise or what might be causing the problem?

All input is appreciated!
thanks.

Khannie

Was it up for a very long time before that? Is it possible that DNS or similar changed? Can you ping an external IP from within the network? (i.e. something connected to the switch) Can you ping the router from within the network?

nitromaster

Khannie wrote: »

Was it up for a very long time before that? Is it possible that DNS or similar changed? Can you ping an external IP from within the network? (i.e. something connected to the switch) Can you ping the router from within the network?

Possibly, not entirely sure on how long it was up!
DNS is actually controlled by the server, forgot to mention that. I've resorted to using the Google DNS servers for the wireless access that works. No luck pinging another computer from the server (both connected to the switch), and no luck pinging the router from anything not directly connected to it.

From running Wireshark on the server, I can see there's ARP requests asking "who is 192.168.1.xx" but none of these seem to get a response. (except when I try pinging the server itself, from the server, which obviously succeeds!)

Khannie

I'm not being funny now, but have you rebooted the router today? I'm assuming this is a business environment since there's a switch involved and those zyxel routers are eh.....not business grade kit.

nitromaster

Khannie wrote: »

I'm not being funny now, but have you rebooted the router today? I'm assuming this is a business environment since there's a switch involved and those zyxel routers are eh.....not business grade kit.

Yeah, rebooted. multiple times.

School environment, agreed those routers are messy...not the one in charge of all this stuff haha (IT guys on holidays, trying to get it running...of course everything breaks when he's gone :rolleyes: )

Any ideas at all work out better than what I've managed so far.

Freddy Smelly

was the eircom modem reset at any point?

it may have been configured to route traffic to the switch but if it was reset then those settings would have been changed back to default settings.