[CentOS] Neighbour table overflow
Robert Moskowitz
rgm at htt-consult.com
Fri Nov 28 03:24:01 UTC 2008
Thomas Dukes wrote:
>
>
> *From:* centos-bounces at centos.org [mailto:centos-bounces at centos.org]
> *On Behalf Of *chloe K
> *Sent:* Thursday, November 27, 2008 9:10 PM
> *To:* CentOS mailing list
> *Subject:* Re: [CentOS] Neighbour table overflow
>
> what is your netmask?
>
> eth0 = 255.255.240.0
That is 4096 addresses (256*16).
> eth1 = 255.255.255.0
> lo = 255.0.0.0
lo is correct. The 'whole' net127. Of which 4 addresses have ever been
used (that I have encountered)....
>
> These don't look right except for eth1. I have made no changes to
> these in about 4 years.
>
> Thanks
>
> */Thomas Dukes <tdukes at sc.rr.com>/* wrote:
>
> Just started getting this. I tried the following by adding it to my
> etc/sysctl.conf:
>
> net.ipv4.neigh.default.gc_thresh1 = 4096
> net.ipv4.neigh.default.gc_thresh2 = 8192
> net.ipv4.neigh.default.gc_thresh3 = 8192
> net.ipv4.neigh.default.base_reachable_time = 86400
> net.ipv4.neigh.default.gc_stale_time = 86400
>
> That pretty much locked things up.
>
> Then I tried another googled solution:
>
> echo 256 > /proc/sys/net/ipv4/neigh/default/gc_thresh1
>
> echo 512 > /proc/sys/net/ipv4/neigh/default/gc_thresh2
>
> echo 1024 > /proc/sys/net/ipv4/neigh/default/gc_thresh3
>
> And adding it also to etc/sysctl.conf:
>
> net.ipv4.neigh.default.gc_thresh1 = 256
> net.ipv4.neigh.default.gc_thresh2 = 512
> net.ipv4.neigh.default.gc_thresh3 = 1024
>
> Still not working.
>
> Any ideas?
>
> TIA
>
>
> _______________________________________________
> CentOS mailing list
> CentOS at centos.org
> http://lists.centos.org/mailman/listinfo/centos
>
>
> *Yahoo! Canada Toolbar :* Search from anywhere on the web and bookmark
> your favourite sites. Download it now! <http://ca.toolbar.yahoo.com/>
>
> ------------------------------------------------------------------------
>
> _______________________________________________
> CentOS mailing list
> CentOS at centos.org
> http://lists.centos.org/mailman/listinfo/centos
>
More information about the CentOS
mailing list