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 From:  Chris Buechler <cbuechler at gmail dot com>
 Cc:  m0n0wall at lists dot m0n0 dot ch
 Subject:  Re: [m0n0wall] Two IP address for WAN
 Date:  Thu, 24 Mar 2005 01:43:16 -0500
On Wed, 23 Mar 2005 20:06:59 -1000, Jim Thompson <jim at netgate dot com> wrote:
> Your netmask ( is a /21, which is a combination of 8 of
> the old "class C" networks.
> Does your cableco really run a 2048 node LAN on the backside of your
> cable modem?

Many do.  My cable modem public IP is on a /21.  The amount of ARP
traffic I can pick up with a sniffer is incredible.  Sure seems like
poor network design, but I can get my full 4.0 Mb down/384 Kb up
virtually always.