Neighbour table overflow
 

Hello, this is my first post in this forum; I have a problem from a few days.
Jun 1 11:29:44 0-1 kernel: [30729.705892] __ratelimit: 68 messages suppressed
Jun 1 11:29:44 0-1 kernel: [30729.705899] Neighbour table overflow.
Jun 1 11:29:49 0-1 kernel: [30734.697506] __ratelimit: 67 messages suppressed
Jun 1 11:29:49 0-1 kernel: [30734.697514] Neighbour table overflow.
Jun 1 11:29:54 0-1 kernel: [30739.698805] __ratelimit: 68 messages suppressed

I have server witch debian Lenny 2.6.26-2-amd64 kernel.
The computer has 3 ethernet interfaces witch 2 in use.

eth0 Link encap:Ethernet HWaddr d4:9c:ff:f3:df:bc
inet addr:10.10.1.1 Bcast:10.255.255.255 Mask:255.0.0.0
inet6 addr: fe80::d69c:ffff:fef3:dfbc/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:708157 errors:0 dropped:0 overruns:0 frame:0
TX packets:1353268 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:51883141 (49.4 MiB) TX bytes:1463058948 (1.3 GiB)
Interrupt:22 Base address:0x2000

eth1 Link encap:Ethernet HWaddr 00:14:d1:18:3f:24
inet addr:190.18.116.146 Bcast:255.255.255.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:576 Metric:1
RX packets:3985247 errors:0 dropped:0 overruns:0 frame:0
TX packets:672576 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:1584421734 (1.4 GiB) TX bytes:48804047 (46.5 MiB)
Interrupt:19 Base address:0x2000

lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:82 errors:0 dropped:0 overruns:0 frame:0
TX packets:82 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:5992 (5.8 KiB) TX bytes:5992 (5.8 KiB)



0-1:/home/cdv# iptables -nL
Chain INPUT (policy ACCEPT)
target prot opt source destination
ACCEPT icmp -- 0.0.0.0/0 0.0.0.0/0
ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 tcp dpt:6666 state NEW
ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 tcp dpt:1194 state NEW
ACCEPT udp -- 0.0.0.0/0 0.0.0.0/0 udp dpt:1194 state NEW
ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 tcp dpt:8112 state NEW
ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 tcp dpt:1666 state NEW
ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 tcp dpt:5900 state NEW
ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state RELATED
DROP all -- 0.0.0.0/0 0.0.0.0/0 state INVALID,NEW

Chain FORWARD (policy ACCEPT)
target prot opt source destination
DROP all -- 0.0.0.0/0 0.0.0.0/0 state INVALID,NEW

Chain OUTPUT (policy ACCEPT)
target prot opt source destination


This is my route table

0-1:/home/cdv# route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
190.18.116.0 0.0.0.0 255.255.255.0 U 0 0 0 eth1
10.0.0.0 0.0.0.0 255.0.0.0 U 0 0 0 eth0
0.0.0.0 190.18.116.1 0.0.0.0 UG 0 0 0 eth1

I set gc_thresh3 into 4096 and this is a temporary solution.But something the error back.
I try switch LAN adapters, Reinstall debian without any services.(only the script firewall).



Any ideas?

i search in google and old post but don't Favorable results
in my lan I have only 6 pcs

Hi,

Welcome to LQ!

What do you get from


Cheers,
Tink

Thnx for the reply .

in gc_tresh1 :128
in gc_tresh2:512
in gc_tresh3 4096

and now set to :


in gc_tresh1 :512
in gc_tresh2:2048
in gc_tresh3 4096

And the problem went away with that?


Cheers,
Tink

News , the problem is back.
Jun 2 19:28:41 0-1 kernel: [145866.725009] Neighbour table overflow.
Jun 2 19:28:46 0-1 kernel: [145871.725270] __ratelimit: 139 messages suppressed
y roll back the changes in thresh1 y 2
in gc_tresh1 :128
in gc_tresh2:512
in gc_tresh3 4096