On Sun, Jun 11, 2017 at 4:57 PM, Joe <j...@jretrading.com> wrote: > On Sat, 10 Jun 2017 10:57:47 +0900 > Joel Rees <joel.r...@gmail.com> wrote: > >> Experimenting from the command line, I find myself puzzled about the >> arguments for ifconfig. >> >> Reading the manual, it would appear that the arguments for ifconfig >> should be something like this: >> >> ifconfig eth0 netmask 255.255.255.224 netmask 255.255.255.224 >> broadcast 10.19.23.223 10.19.23.94 >> >> But the command returns with >> >> SIOCSIFNETMASK: Can't allocate this address. >> SIOCSIFBRDADDR: Can't allocate this address. >> >> If I repeat the command, it gives no errors, but the netmask and >> broadcast address end up full class A (255.0.0.0 and 10.255.255.255). >> >> Anyone have an idea what's happening? >> > > Could you humour me for a moment, and try the exercise with one of the > 192.168... networks, with the same sized subnet? > > I've seen this kind of behaviour a very long time ago, and I can't > really believe it is still happening, but...
See the other sub-thread. But it does go to class C instead of the partial class C when the device address comes at the end of the list. -- Joel Rees Trying to re-invent the entire industry all by myself: http://defining-computers.blogspot.jp/