James Harrison schrieb: > However i'm still completely confused on the whole 0/9 issue- what does > this specify? We're talking about the notation 172.128.0.0/9 or shorter 172.128/9 or similar. The part after the slash is the subnetmask (netmask). It is the number of binary 1s starting from the left. 9 means the same as 255.128.0.0. The first octett has all bits set to 1 => 255, the second only the first bit => 128 and all others are 0 => 0 ;) HTH, Joerg
