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 11:07:09 +0200 [thread overview]
Message-ID: <4AF1443D.8020109@redhat.com> (raw)
In-Reply-To: <4AF0502C.5010304@aixigo.de>
On 11/03/2009 05:45 PM, Harald Dunkel wrote:
> Hi folks,
>
> I am trying to use a bonding network interface as a bridge
> for a virtual machine (kvm). Host and guest are both running
> 2.6.31.5. Problem: The guest does not receive the DHCPOFFER
> reply sent by my dhcp server. There is no such problem if
> the host uses just a single network interface instead of
> bond0.
>
> Looking at tcpdump on the Linux guest there are several dhcp
> discover packages like
>
> 15:17:44.005306 00:16:36:2f:f1:d2> ff:ff:ff:ff:ff:ff, ethertype IPv4 (0x0800), length 342: (tos 0x10, ttl 128, id 0, offset 0, flags [none], proto UDP (17), length 328) 0.0.0.0.68> 255.255.255.255.67: BOOTP/DHCP, Request from 00:16:36:2f:f1:d2, length 300, xid 0x4c31213d, secs 10, Flags [none]
> Client-Ethernet-Address 00:16:36:2f:f1:d2 [|bootp]
>
> The dhcp server receives these packages, and sends out
> a reply
>
> 15:17:45.927589 00:16:36:2f:f1:d2> ff:ff:ff:ff:ff:ff, ethertype IPv4 (0x0800), length 342: (tos 0x10, ttl 128, id 0, offset 0, flags [none], proto UDP (17), length 328) 0.0.0.0.68> 255.255.255.255.67: BOOTP/DHCP, Request from 00:16:36:2f:f1:d2, length 300, xid 0x4c31213d, secs 10, Flags [none]
> Client-Ethernet-Address 00:16:36:2f:f1:d2 [|bootp]
> 15:17:45.927658 00:15:17:94:16:65> 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) 172.19.96.123.67> 172.19.97.243.68: BOOTP/DHCP, Reply, length 322, xid 0x4c31213d, secs 10, Flags [none]
> Your-IP 172.19.97.243
> Client-Ethernet-Address 00:16:36:2f:f1:d2 [|bootp]
>
> This reply never shows up on the guest.
>
>
>
Can you tcpdump on bond0, br0, vnet0, and the guest's interface to see
where the packet is lost?
--
error compiling committee.c: too many arguments to function
next prev parent reply other threads:[~2009-11-04 9:07 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 [this message]
2009-11-04 11:02 ` Harald Dunkel
2009-11-04 11:09 ` Avi Kivity
2009-11-05 8:13 ` Harald Dunkel
2009-11-06 4:48 ` David S. Ahern
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=4AF1443D.8020109@redhat.com \
--to=avi@redhat.com \
--cc=harald.dunkel@aixigo.de \
--cc=kvm@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.