[Xen-users] [Fwd: Issue with bridge networking]

[Jérémie Grauer <jeremie.grauer@xxxxxxxxxx>]

Hi everyone,

I have some trouble with the network on a domu on a new host : I've made
a bridge and configured it but when I start the domu, I can't ping any
network... seems like the bridge is not working :'(

I've created the bridge directly in /etc/network/interface and I'm using
Xen 3.0.3 on a debian etch, bellow are the xen packages installed on dom0 :

#dpkg -l|grep xen
ii  libc6-xen
2.3.6.ds1-13etch8                    GNU C Library: Shared libraries
[Xen version
ii  linux-headers-2.6.18-6-xen
2.6.18.dfsg.1-23etch1                Common header files for Linux 2.6.18
ii  linux-headers-2.6.18-6-xen-686
2.6.18.dfsg.1-23etch1                Header files for Linux 2.6.18 on i686
ii  linux-image-2.6.18-6-xen-686
2.6.18.dfsg.1-23etch1                Linux 2.6.18 image on i686
ii  linux-modules-2.6.18-6-xen-686
2.6.18.dfsg.1-23etch1                Linux 2.6.18 modules on i686
ii  xen-hypervisor-3.0.3-1-i386-pae
3.0.3-0-4                            The Xen Hypervisor on i386 with pae
ii  xen-linux-system-2.6.18-6-xen-686
2.6.18.dfsg.1-23etch1                XEN system with Linux 2.6.18 image
on i686
ii  xen-utils-3.0.3-1
3.0.3-0-4                            XEN administrative tools
ii  xen-utils-common
3.0.3-0-2                            XEN administrative tools - common files

Bellow are all the information I could think of to find the
origin of the issue, let me know if you need anything else :

xen domU config file :
_______________________________________________________
# kernel to use
kernel = "/boot/vmlinuz-2.6.18-6-xen-686"
# kernel ramdisk
ramdisk = "/boot/initrd.img-2.6.18-6-xen-686"
# memory in mb
memory = 128
# CPUs
vcpus = 1
# domain name
name = "artemis"
# root device
root = "/dev/hda1 ro"
# disk mappin
disk = [ 'phy:/dev/rootvg/Artemis,hda1,w' ]
# network bridge
vif = [ 'mac=BB:BB:BB:BB:01:01, bridge=br-pub' ]
_______________________________________________________

dom0 /etc/network/interfaces :
_______________________________________________________
# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).

# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
allow-hotplug eth0
iface eth0 inet static
        address xxx.yyy.99.4
        netmask 255.255.255.0
        network xxx.yyy.99.0
        broadcast xxx.yyy.99.255

allow-hotplug eth1
iface eth1 inet static
        address xxx.yyy.140.6
        netmask 255.255.255.240
        network xxx.yyy.140.0
        gateway xxx.yyy.140.1
        broadcast xxx.yyy.140.15

auto br-pub
iface br-pub inet static
        address 0.0.0.0
        netmask 0.0.0.0
        network 0.0.0.0
        bridge_ports eth2

auto br-dmz
iface br-dmz inet static
        address 0.0.0.0
        netmask 0.0.0.0
        network 0.0.0.0
        bridge_ports eth3
_______________________________________________________

domU /etc/network/interfaces :
_______________________________________________________
# for xen domain
auto lo
        iface lo inet loopback

auto eth0
iface eth0 inet static
        address xxx.yyy.140.7
        netmask 255.255.255.240
        network xxx.yyy.140.0
        gateway xxx.yyy.140.1
        broadcast xxx.yyy.140.15

_______________________________________________________

brctl show result (when domU is started) :
_______________________________________________________

xxxx:/var/log/xen# brctl show
bridge name     bridge id               STP enabled     interfaces
br-dmz          8000.001b21196811       no              eth3
br-pub          8000.001b21196810       no              eth2
                                                        vif1.0
_______________________________________________________

iptable (when domU is started) :
_______________________________________________________

# iptables -L
Chain INPUT (policy ACCEPT)
target     prot opt source               destination

Chain FORWARD (policy ACCEPT)
target     prot opt source               destination
ACCEPT     0    --  anywhere             anywhere            PHYSDEV match --physdev-in vif1.0

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination



Any help is welcome.

Regards,
Jeremie

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