This set everytime to 0 last Byte
:put (194.243.25.13 & 255.255.255.0)
From
http://forum.mikrotik.com/t/rextended-fragments-of-snippets/151033/1
{
:local sourceip 194.243.25.13
:local sourcesub 255.255.255.0 ; # /24
:local ip [:toip $sourceip]
:local submask [:toip $sourcesub]
:local network ($ip & $submask)
:put " Network* IP: $network"
}