I have just setup a UC320 for a client and it was working without trouble for the last few days up until last night. It is now taking out my entire network and causing a packet flood. When i disconnect the device from the network all comes back up ok and i can then reconnect the UC320 and all goes back to normal for a while until it happens again. I cant seem to see any pattern to it though.
I have a few things that i can think of that might be causing it. First of all, the WAN port IP is on the same subnet as the LAN IP. This is because the router i am using doesnt support a seperate WAN subnet. (Topology is Route Voice Only) I am only using the device for voice so i could always put these on seperate subnets but my thinking up until now has been that i need to be able to access the config remotely from a machines within that subnet.
Both the WAN and the LAN ports on the device is connected to an SG300-10P and all handsets are powered via POE. The SG300 is also connected back into the main network. I would have thouht that if there was an issue with the UC320 flooding the SG300 would shut that port down using Spanning Tree.
I also figured that the WAN and LAN port must be routed seperately within the device therfor not causign a loop. If this wasnt the case then i would have a constant loop but the device has and does work in the configuration just not all the time.
As you can tell by now im pretty new at this and this is my first of hopefully many installs.
Any advice would be greatly appreciated as i am struggling to get on top of this one.