[Bridge] Neighbour table overflow.

Stephen Hemminger shemminger at osdl.org
Tue Jan 4 10:26:27 PST 2005


On Wed, 05 Jan 2005 01:50:32 +0800
ro0ot <ro0ot at phreaker.net> wrote:

> Hi,
> 
> I had setup my bridge (br0) as below: -
> 
> ifconfig eth0 0.0.0.0
> ifconfig eth5 0.0.0.0
> 
> brctl addbr br0
> 
> brctl addif br0 eth0
> brctl addif br0 eth5
> 
> brctl stp br0 on
> 
> Once I connect both the interface (eth0 and eth5) to my network.  I 
> can't ping to my router (connect to eth0) or ping to my other IP 
> addresses (connect to eth5).  I check around and found out some messages 
> pops up in /var/log/syslog file as below: -
> 
> Jan  2 10:44:22 fw01 kernel: ipt_tcpmss_target: bad length (64 bytes)
> Jan  2 10:44:32 fw01 last message repeated 11 times
> Jan  2 12:27:08 fw01 kernel: Neighbour table overflow.
> Jan  2 12:27:11 fw01 last message repeated 9 times
> Jan  2 12:27:13 fw01 kernel: NET: 10 messages suppressed.
> Jan  2 12:27:13 fw01 kernel: Neighbour table overflow.
> Jan  2 12:27:18 fw01 kernel: NET: 27 messages suppressed.
> Jan  2 12:27:18 fw01 kernel: Neighbour table overflow.
> 
> Once I disconnect the cable from the eth5 interface, I can ping to my 
> router.  I try to reconnect the cable back to the eth5 interface and run 
> a ping to my router.  As the result, I can't ping the router and the 
> similar messages pops up in the /var/log/syslog file.
> 
> How can I resolve this issue?
> 
>
It is an iptables/ebtables issue, you should check with
netfilter-user at lists.netfilter.org or ebtables-user at lists.sourceforge.net



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