Thousands of hosts on a gigabit LAN, maybe not

John Levine johnl at
Fri May 8 20:05:52 UTC 2015

>> to have 10,000 entries or more in its ARP table.
>Agreed. :) You don't really want 10,000 entries in a routing FIB
>table either, but I was seriously encouraged by the work going
>on in linux 4.0 and 4.1 to improve those lookups.

One obvious way to deal with that is to put some manageable number of
hosts on a subnet and route traffic between the subnets.  I think we
can assume they'll all have 10/8 addresses, and I'm not too worried
about performance to the outside world, just within the network.


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