I am glad to hear that the network is back up. I would update the firmware on the PowerConnect and sonicwall devices. You may want to look at the logs on the devices also, see if they have any insight to the issue. Do you have any network monitoring software running? If you do you could check to see what the activity was like right up to the issue occurring.
Hello, We have dell sonic wall firewall and then core switch 6248P, all of sudden we are unable to go online, however we can still connect to our site to site VPN When we connected directly after firewall, can go online but via switch. Please suggest.   Thanks in advance
Not able to go online, suddenly via powerconnect L3 switch