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Re: legacy /8


From: bmanning () vacation karoshi com
Date: Sat, 3 Apr 2010 00:20:58 +0000

On Fri, Apr 02, 2010 at 03:46:55PM -0700, Owen DeLong wrote:

The expectation was that those /8s would be subnetted into vast arrays of "Class C" sized chunks and that subnets 
within a given /8 all had to be the same size (this used to be necessary to keep RIP happy and every machine 
participating in RIP routing had to have an /etc/netmasks (or equivalent) table that tracked "THE" subnet mask for 
each natural prefix).

        er, again, not true. the space was originally, net/host - the mantra was "bridge where 
        you can, route when you must" - there were expected to be a few networks with millions
        of hosts within each broadcast domain.  (anyone else remember the ARP storms of the 
        1970s/1980s?)

        routing came into its own later, along with classful addressing.

Owen


--bill


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