---- Robert Moskowitz <rgm@xxxxxxxxxxxxxxx> wrote:
> Thomas Dukes wrote:
> >
> >
> > *From:* centos-bounces@xxxxxxxxxx [mailto:centos-bounces@xxxxxxxxxx]
> > *On Behalf Of *chloe K
> > *Sent:* Thursday, November 27, 2008 9:10 PM
> > *To:* CentOS mailing list
> > *Subject:* Re: Neighbour table overflow
> >
> > what is your netmask?
> >
> > eth0 = 255.255.240.0
>
> Why do you have such a large subnet? There are a number of potential
> performance problems with such a setup. I typically only see this in
> large, bridged wireless campuses. Little justification for it in a
> wired network. (I do have lots of networking experience and knowledge,
> having consulted with a number of large deployments).
>
> Even with a large subnet, you should not be arping everywhere. Either
> two things are happening:
>
> Your system is recording every ARP request it sees ('Who has IP
> x.x.x.x') to avoid arping later. Bad behaviour (IMNSHO), given your
> network.
>
> Your system is ARPing for every IP address in the subnet to learn all of
> its neighbors. WHy would it do that? Unless you have some snooping
> software running on your system.
>
Hi Robert,
I did not set this value. Something did but not me.
I am on a roadrunner connection with a dynamic ip. What do you suggest I change it to?
Thnaks!!
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