Please remember that No octet can go above 255 or it will become non routable and may not update in any local ARP's
Hesp ----- Original Message ----- From: "Jeff Newmiller" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Sunday, March 10, 2002 9:06 AM Subject: Re: [vox-tech] netmask question > On Sun, 10 Mar 2002, Peter Jay Salzman wrote: > > > how would someone write a range of IP addresses > > > > 61.220.0.0 - 61.227.255.255 > > 00111101.11011100.00000000.00000000 > 00111101.11100011.11111111.11111111 > > If you want to write it in netmask form, you have to be able to divide it > into two parts cleanly... the first part has to have identical bits, and > the second part has to be all zeroes in the lower address and all ones in > the higher end of the address range. > > Hmm... adding a dividing point at a power of two rollover (the first bit > that is different)... > > 00111101.11011100.00000000.00000000 > 00111101.11011111.11111111.11111111 > > 00111101.11100000.00000000.00000000 > 00111101.11100011.11111111.11111111 > > it fits into two ranges, characterized by the first 13 bits, or > > 61.220.0.0/255.252.0.0 > 61.224.0.0/255.252.0.0 > > Other arbitrary starting and ending points might not work out as two > ranges... might have to split at more than one power of two to get the > "same network bits, host bits roll from all zeroes to all ones" pattern. > > -------------------------------------------------------------------------- - > Jeff Newmiller The ..... ..... Go Live... > DCN:<[EMAIL PROTECTED]> Basics: ##.#. ##.#. Live Go... > Live: OO#.. Dead: OO#.. Playing > Research Engineer (Solar/Batteries O.O#. #.O#. with > /Software/Embedded Controllers) .OO#. .OO#. rocks...2k > -------------------------------------------------------------------------- - > > > > _______________________________________________ > vox-tech mailing list > [EMAIL PROTECTED] > http://lists.lugod.org/mailman/listinfo/vox-tech > _______________________________________________ vox-tech mailing list [EMAIL PROTECTED] http://lists.lugod.org/mailman/listinfo/vox-tech
