Death of a switch?

[ndavies]

Having a strange problem, our adsl router is set up on a static ip, has been since time began. this morning however the connection was playing up, no-one could get internet or email. I go in and found the broadband connection absolutely fine when a single machine connected to the router, as soon as I plug it back into the network (one dc, one pro curve switch), I can't access the router from the ip, can't ping it. nada.

 

On top of this printers have been intermittently accessible as well as file shares.

 

I plugged the router straight into the only spare hub (!) I had, plugged the dc in and hey presto worked perfectly.

 

Am i right in deciding the procurve switch is coughing it's last. Seems strange that it's fine one minute and throwing stuff out the next, or in the case of the router, not even allowing it on.

[Dos_Box]

Rogue IP address perhaps?

[ndavies]

You mean something else on the network has taken the same ip as the router?

I'm unable to ping that ip when the router is plugged into the switch nor unplugged.

[Michael]

Get a pen or pencil and push and hold the reset switch to restore to factory default. See if this helps

[sted]

somebody hasnt looped the network have they i.e ooh look cable going nowhere ill just plug it in this empty socket

[localzuk]

somebody hasnt looped the network have they i.e ooh look cable going nowhere ill just plug it in this empty socket

 

This would be my first thought. Easy way to test is using that hub - plug all cables from the switch into the hub, and set up wireshark on one computer on the hub, capturing the traffic and looking for a massive number of broadcast traffic.

 

If the switch is a managed switch, you could turn on STP to eliminate this.