i have a strange problem in my network. Sometimes one device (maybe a workstation or printer or even a server) is unreachable by 50% of all other devices in the network.A Ping fails and a traceroute stops at the core router. They are in different ip segments but all in a broadcast domain. I have to do an "clear arp-cache" on my core router in order to get everything fine. What in hell could that be ? The log on the router shows nothing weird....
Thx in advance