From: Avi Kivity <avi@redhat.com>
To: Harald Dunkel <harald.dunkel@aixigo.de>
Cc: kvm@vger.kernel.org
Subject: Re: kvm problem: bonding network interface breaks dhcp
Date: Wed, 04 Nov 2009 13:09:08 +0200 [thread overview]
Message-ID: <4AF160D4.7010109@redhat.com> (raw)
In-Reply-To: <4AF15F41.9050506@aixigo.de>
On 11/04/2009 01:02 PM, Harald Dunkel wrote:
> Avi Kivity wrote:
>
>> Can you tcpdump on bond0, br0, vnet0, and the guest's interface to see
>> where the packet is lost?
>>
>>
> Sure. Using the tcpdump command line:
>
> tcpdump -i br0 -w /var/tmp/tcpdump.br0 ether host 00:16:36:2f:f1:d2
>
> (similar for other interfaces) I can see the DHCPOFFER coming
> from my dhcp server on bond0:
>
> 11:00:08.237350 00:15:17:91:3f:59> 00:16:36:2f:f1:d2, ethertype IPv4 (0x0800), length 364: (tos 0x10, ttl 128, id 0, offset 0, flags [none], proto UDP (17), length 350)
> 172.19.96.124.67> 172.19.97.250.68: BOOTP/DHCP, Reply, length 322, xid 0x78fb274e, secs 3, Flags [none]
> Your-IP 172.19.97.250
> Client-Ethernet-Address 00:16:36:2f:f1:d2 [|bootp]
>
> It is also visible on br0:
>
> 11:00:08.237350 00:15:17:91:3f:59> 00:16:36:2f:f1:d2, ethertype IPv4 (0x0800), length 364: (tos 0x10, ttl 128, id 0, offset 0, flags [none], proto UDP (17), length 350)
> 172.19.96.124.67> 172.19.97.250.68: BOOTP/DHCP, Reply, length 322, xid 0x78fb274e, secs 3, Flags [none]
> Your-IP 172.19.97.250
> Client-Ethernet-Address 00:16:36:2f:f1:d2 [|bootp]
>
>
> But it is not visible on vnet0, and of course not on the
> guest. All I see there are the DHCPDISCOVER calls sent by
> the guest, and some IPv6 traffic:
>
>
So, it looks like a bridging problem. Can you send this the bridge
maintainers (Stephen Hemminger <shemminger@linux-foundation.org>,
bridge@lists.linux-foundation.org)?
--
error compiling committee.c: too many arguments to function
next prev parent reply other threads:[~2009-11-04 11:09 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-11-03 15:45 kvm problem: bonding network interface breaks dhcp Harald Dunkel
2009-11-03 17:06 ` Matthew Palmer
2009-11-04 7:50 ` Harald Dunkel
2009-11-04 9:07 ` Avi Kivity
2009-11-04 11:02 ` Harald Dunkel
2009-11-04 11:09 ` Avi Kivity [this message]
2009-11-05 8:13 ` Harald Dunkel
2009-11-06 4:48 ` David S. Ahern
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