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neighbor table overflow

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# 1  
Old 11-14-2011
neighbor table overflow
hi folks,

Do you have any idea why this error occurs ?

My server is hp blade in c7000 frames running RHEL 4 update 4.
Code:
[root@xxx network-scripts]# uname -a
Linux xxx 3 2.6.9-55.0.12.ELsmp #1 SMP Wed Oct 17 08:15:59 EDT 2007 x86_64 x86_64 x86_64 GNU/Linux

Applications running are jboss or java applications:

Code:
[root@xxx-network-scripts]# tail -f /var/log/messages
Nov 14 07:44:37 xxx kernel: printk: 11369 messages suppressed.
Nov 14 07:44:37 xxx kernel: Neighbour table overflow.
Nov 14 07:44:42 xxx kernel: printk: 11337 messages suppressed.
Nov 14 07:44:42 xxx kernel: Neighbour table overflow.
Nov 14 07:44:47 xxx kernel: printk: 11443 messages suppressed.
Nov 14 07:44:47 xxx kernel: Neighbour table overflow.
Nov 14 07:44:52 xxx kernel: printk: 11433 messages suppressed.
Nov 14 07:44:52 xxx kernel: Neighbour table overflow.
Nov 14 07:44:57 xxx kernel: printk: 11347 messages suppressed.
Nov 14 07:44:57 xxx kernel: Neighbour table overflow.

Tried to move already the server profile in another blade but error message still occurs ...
Last edited by linuxgeek; 11-14-2011 at 10:15 AM.. Reason: missing code tags and changing quote to code
# 2  
Old 11-14-2011
Did you simply google for your error message? I got lot of hits like:
gnulinuxclub.org - How to resolve "Neighbour table overflow" problem?
# 3  
Old 11-14-2011
Yes, we had changed it already to that value but still error persists:

Code:
[root@xxx-network-scripts]# cat /proc/sys/net/ipv4/neigh/default/gc_thresh3
1024
[root@xxxnetwork-scripts]# cat /proc/sys/net/ipv4/neigh/default/gc_thresh2
512
[root@xxxnetwork-scripts]# cat /proc/sys/net/ipv4/neigh/default/gc_thresh1
256

Moderator's Comments:
Mod Comment You have many posts already and should be familiar using code tags - see PM for a guide.
Last edited by zaxxon; 11-14-2011 at 10:13 AM.. Reason: code tags
# 4  
Old 11-14-2011
Some people take even bigger values according to googled info:
Code:
echo 512 > /proc/sys/net/ipv4/neigh/default/gc_thresh1
echo 2048 > /proc/sys/net/ipv4/neigh/default/gc_thresh2
echo 4096 > /proc/sys/net/ipv4/neigh/default/gc_thresh3

Don't forget that this is only temporary unless you add it to a script or something like /etc/sysctl.conf or /etc/sysctl.d/*
This User Gave Thanks to zaxxon For This Post:
linuxgeek
# 5  
Old 11-14-2011
Thank you Sir ... will try to do that.
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