Re: What does "Neighbour table overflow" message indicate?

From: Kurt Roeckx (
Date: Sun Jul 29 2001 - 04:46:40 EST

On Sat, Jul 28, 2001 at 09:15:11PM -0500, Steve Snyder wrote:
> Further snooping shows the error msg text in file inux/net/ipv4/route.c:
> if (net_ratelimit())
> printk("Neighbour table overflow.\n");
> The reference to "net_ratelimit" make me wonder if it is related to
> iptables. I am using iptable, and have since kernel 2.4.1, but I've seen
> these messages before. Hmmm.

net_ratelimit() is there to only log something every 5 seconds,
so your logs don't get flooded. It should be used for every
printk that has to do with net.

See core/utils.c


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