topic Re: sorting ip addresses in Operating System - Linux

sorting ip addresses

anang bohra — Tue, 10 Jul 2001 11:20:04 GMT

hi there,
i have a linux DHCP server and i want to assign only odd ip addresses to the machines.
i am using class B address.

thanx in advance.

Re: sorting ip addresses

Bill Thorsteinson — Wed, 11 Jul 2001 03:45:25 GMT

This is a very strange request, and doesn't seem
to match the subject heading.

However you can do it like this

subnet 10.0.1.0 netmask 255.255.255.0 {
range 10.0.1.1;
range 10.0.1.3;
range 10.0.1.5;
range 10.0.1.7;
range 10.0.1.9;
}

Re: sorting ip addresses

anang bohra — Wed, 11 Jul 2001 08:45:40 GMT

thanx Bill,
but i wanted to know if we could write any script for this; otherwise it requires large no. of entries.
any help will be appreciated.

Re: sorting ip addresses

Vincent Fleming — Wed, 11 Jul 2001 13:03:23 GMT

awk '{for( i=1; i < 256; i+=2 ) { printf( "range 10.0.1.%d\n", i ) } }'

Hit enter, and all the entries will spit out. Redirect this to a file, paste it into the proper config file.

Re: sorting ip addresses

anang bohra — Fri, 13 Jul 2001 08:54:13 GMT

hi vincent,
may i know which conf. file do i need to enter
thanks in advance

Re: sorting ip addresses

Vincent Fleming — Fri, 13 Jul 2001 23:06:11 GMT

I haven't actually set dhcp up on linux before, but I think it's /etc/dhcp.conf (that's what it is on FreeBSD)
You should just check the man page for that.