[Users] Re: network problems: eth0: received packet with own address as source address

frank frank at si.ct.upc.edu
Thu May 20 03:14:11 EDT 2010

Hi again,
I have more specific information about this.

Problem seems to be related with the addition of veth to bridge 
interface. Main Host interface eth0 is joined to a bridge in startup in 
order to VEs can join its veths to the same subnet. This bridge has the 
host IP, and it takes its MAC from eth0. But when a VE is started, its 
veth is joined to the same bridge, and the bridge changes its MAC to 
veth one !! That's when network problems start.

I have made some tests in other servers, and there, bridge MAC remain as 
eth0 MAC all the time, it does not change with veth additions.
I don't know why bridge MAC change when a new veth is joined.

Any ideas or suggestions?
Thanks in advance.


Al 19/05/10 18:00, En/na users-request at openvz.org ha escrit:
> Date: Wed, 19 May 2010 09:34:31 +0200
> From: frank<frank at si.ct.upc.edu>
> Subject: [Users] network problems: eth0: received packet with own
> 	address as source address
> To: users at openvz.org
> Message-ID:<4BF39487.5010306 at si.ct.upc.edu>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
> Hi,
> we have two nodes with Red Hat 5.4 and OpenVZ, sharing a GFS filesystem.
> kernel is 2.6.18-164.15.1.el5.028stab068.9PAE
> We are having problems with VEs network some time ago. We have 40 VEs,
> some of them with venet interfaces and some with veths.
> Problem seems to be with veths ones.
> Sometimes Nodes seems to frozen intermitently, and in the logs we see
> messages like
> eth0: received packet with  own address as source address
> ....
> eth1: received packet with  own address as source address
> ......
> We have reviewed network configurations, MAC addresses, and so on, but
> we don't see anything wrong.
> For instance, now we are in a situation where we have one VE with two
> veths running in one node, and if we move it to the other one,
> the other node starts to froze and a lot of messages like later  ones
> (wrong packets)  appear.
> We are quite worried with this, so any suggestions will be greatly
> appreciated.
> Thanks and regards.
> Frank

Aquest missatge ha estat analitzat per MailScanner
a la cerca de virus i d'altres continguts perillosos,
i es considera que està net.

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