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Author Topic: Neighbour Table Overflow  (Read 5579 times)

Offline ashishraj

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Neighbour Table Overflow
« on: August 30, 2007, 06:43:44 AM »
i have fedora core2
i faced new prob.
"printk:3004 messeges suppressed
Neighbour table overflow "

and my server rejects nodes...
they cant serf.

plz solve this.

Offline Ricky

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Re: Neighbour Table Overflow
« Reply #1 on: September 01, 2007, 12:46:25 PM »
It is related to your network setup..you machine is unable to determine who is who.
Can you tell me eth setup or your machine.. including netmask.

Offline ashishraj

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Re: Neighbour Table Overflow
« Reply #2 on: September 02, 2007, 06:46:09 AM »
sure Ricky
i m using fedora core 2

eth0 = 10.20.114.214 / 255.255.128.0 (isp)
eth1 = 192.168.1.1 /255.255.255.0 (my local network)
ppp0 (xDSL) = assigned by DHCP

i use NAT + squid transparent proxy as per ur saying...
http://www.linuxsolved.com/linux-forums/linux-tutorials-how-tos/configuring-squid-proxy-server-transparent-proxy-t116.0.html
Ricky u want my squid.conf for more info.?
« Last Edit: September 02, 2007, 06:54:55 AM by ashishraj »

Offline Ricky

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Re: Neighbour Table Overflow
« Reply #3 on: September 02, 2007, 01:38:24 PM »
As far as I know .. this problem is related to netmask
Try changing eth0 's netmask to
255.255.255.0

Don't worry it will work .

Offline ashishraj

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Re: Neighbour Table Overflow
« Reply #4 on: September 05, 2007, 05:19:09 AM »
Ricky as per u say i done it but problem is still running...
after that i done eth0 on DHCP (auto) than after problem is still running....
i remake my squid but no result...

plz.. tell me what is the reson of that
this prob. accured after 1 year of successfully run FC2

plz... solved my prob.

Offline Ricky

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Re: Neighbour Table Overflow
« Reply #5 on: September 06, 2007, 11:21:59 AM »
You can also increase threshold values at :
/proc/sys/net/ipv4/neigh/default/

there must be three files namely..
gc_thresh1
gc_thresh2
gc_thresh3

see their current value and try to raise it (multiple of 8) .. say if 128 then try 256 .

Though this is not the preferred, I feel there must be some misconfiguration or very large number of machines on netwrk.

Offline ashishraj

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Re: Neighbour Table Overflow
« Reply #6 on: September 06, 2007, 12:21:58 PM »
i already done that thresh1,2,3....128,256,1024
but no result
only 25 pc on my network..
 ???

Offline ashishraj

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Re: Neighbour Table Overflow
« Reply #7 on: September 08, 2007, 08:28:37 AM »
Ricky
any solution of this ?

Offline Ricky

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Re: Neighbour Table Overflow
« Reply #8 on: September 08, 2007, 10:55:38 AM »
Try isolating your network from internet ie. your ISPs and then see.