 | | | Neighbour table overflow kernel msg in RH ES3 | Neighbour table overflow kernel msg in RH ES3 2004-02-23 - By Rainer Traut
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Hi,
Stephen Smoogen wrote:
> I have seen this with our new firewall boxes we are building. The fix
> was to increase the proc/sys/net/ipv4/neigh/default/gc_threshX to higher
> values.. that eliminated the errors and increased the throughput (in our
> case).
thank you, I will try that.
Found also on google:
> Try increasing the numbers in
> /proc/sys/net/ipv4/neigh/default/gc_thresh{2,3}. These two numbers
> determine how many arp cache entries the kernel will keep. gc_thresh2
> is a soft limit - the kernel starts trying to throw stuff away when it
> has at least this many entries. gc_thresh3 is a hard limit - the kernel
> will never allocate more than gc_thresh3 arp entries. I would try
> doubling them and seeing if it helps.
Rainer
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