Max, I set sack.enable=0 on both FreeBSD machines but the same happens. Volker On 2005-10-23 00:40, Max Laier wrote: > To try something else: Could you guys try to disable SACK on the machines > involved? I haven't looked at the dumps as of yet, but that's one simple > test that might help to identify the problem. > > sysctl net.inet.tcp.sack.enable=0 >