Hi, I found out that the alpha only hangs, when the cable is connected to the x86. When the alpha is off-line or the cable is only connected to the alpha, pings produce plip-timeouts, but no hangs. When the cable is connected to the x86, even a ping from the x86 to the alpha hangs the machine. The x86 has received 1 packet and tries to send some back to the alpha who doesn't receive them. Bye, Marius