On Jan 5, 2011, at 9:44 AM, Jeff Wheeler wrote:
On Wed, Jan 5, 2011 at 12:26 PM, Phil Regnauld <regnauld@nsrc.org> wrote:
Jeff Wheeler (jsw) writes:
Not good, but also does not affect any other interfaces on the router. You're assuming that all routing devices have per-interface ARP tables.
No, Phil, I am assuming that the routing device has a larger ARP table than 250 entries. To be more correct, I am assuming that the routing device has a large enough ARP table that any one subnet could go from 0 ARP entries to 100% ARP entries without using up all the remaining ARP resources on the box. This is usually true. Further, routing devices usually have enough ARP table space that every subnet attached to them could be 100% full of active ARP entries without using up all the ARP resources. This is also often true.
But, Jeff, if the router has a bunch of /24s attached to it and you scan them all, the problem is much larger than 250 arp entries. I think that's what Phil was getting at. Owen