Karl B. Hammar wrote: > > Excerpt from rfc188.txt shows that it is a perfectly legal broadcast and > subnetmask. > > One bad thing of using the first subnet is that some old tcp/ip > implementations can refuse to talk to you. That's what I meant by 'weird subnetting' :-) I figured it might be legal but didn't want to figure out the complement of 63 in my head ... I guess it's an interrupt problem in that case. Michael