Trying to upgrade to new switches but cannot move my DNS servers without bringing down the network!
Posted on 2008-11-18
We currently have 10 unmanaged switches on our network which are HP Procurve 2124 (100mbs). We have purchased 10 HP Procurve 1800 24G gigabit swithces with which to replace them.
- We can plugin the new switches and connect them to the existing switches with no problem.
- We can then move client connections (PC's, Laptops, Printers and the like) over to these new switches without a problem.
- We can move standard servers (non DC) over to the new switches.
Our problem is that if we try to move either of out two DNS servers over to the new switches all hell breaks loose! To start with on boot up the server hangs on "Preparing Network Connections" before finally failing and allowing the log on. We then find that not only can this particular DNS server not browse or ping any other resource but that every server and every computer on the network suffers the same fate instantly which essentially crashes the entire network.
If we pull the network cables out an stick them back into the old switches, within minutes everything is back to normal.
At first I thought that the problem was a faulty switch however this cannot be the case on all 10 of them!
For refereence we have out switches set up in a cascading pattern.
All suggestions would be appreciated.