Re: [PATCH + RFC] neighbour/ARP cache scalability

[Andre Tomt <andre@xxxxxxxx>]

Harald Welte wrote:
> As a result, on systems with large networks (think of even less than 16
> bit netmasks!) the neighbour table can grow quite significantly,
> especially if some jerk runs pktgen with random destinations, and we
> start expiring 'real' neighbours in favour of incomplete ones.  

Or just regular worms/viruses traversing the Internet. Usually in setups 
I've seen, the arp cache overflows within seconds even on "smaller" 
prefixes like /21. The networks did get redesigned properly as a result 
of this however.