I have a Ubuntu box in my network which crashed, all the system connected to the switch in which the Ubuntu system was connected started giving problem. I removed that system from the network, since that was the last change I made in my network and everything was fine. So, to confirm this I again connected the system back to the network and the same network outage happened.
When I checked the links it was fine. When I rebooted the problematic system and again connected back to the network switch everything started working.
I think possibly the crash of the Ubuntu system could have caused this outage.
Is there any possibility that a kernel crash can cause network issues?