RE: [Xen-users] network-bridge problem (maybe debian etch related)

["Guillaume Lenoir" <glenoir@xxxxxxxxxxxxx>]

When/where do you declare your bridge ?
Do you declare it by hand ? because I don't see it in the interfaces
config. 
some link that helped me :
http://grml.org/xen/

I've struggled with xen networking quite a bit on debian etch amd64 and
I believe my config is not perfect (critics welcome), but I have a
running windows XP VM on the network.
So here it is :

$ sudo dpkg -l | grep xen 
ii  linux-image-2.6-xen-amd64           2.6.18+6
Linux kernel 2.6 image on AMD64
ii  linux-image-2.6.18-4-xen-amd64      2.6.18.dfsg.1-12etch1
Linux 2.6.18 image on AMD64
ii  linux-image-xen-amd64               2.6.18+6
Linux kernel image on AMD64
ii  linux-modules-2.6.18-4-xen-amd64    2.6.18.dfsg.1-12etch1
Linux 2.6.18 modules on AMD64
ii  xen-docs-3.0                        3.0.3-0-2
documentation for XEN, a Virtual Machine Mon
ii  xen-hypervisor-3.0.3-1-amd64        3.0.3-0-2
The Xen Hypervisor on AMD64
ii  xen-ioemu-3.0.3-1                   3.0.3-0-2
XEN administrative tools
ii  xen-linux-system-2.6.18-4-xen-amd64 2.6.18.dfsg.1-12etch1
XEN system with Linux 2.6.18 image on AMD64
ii  xen-tools                           2.8-2
Tools to manage debian XEN virtual servers
ii  xen-utils-3.0.3-1                   3.0.3-0-2
XEN administrative tools
ii  xen-utils-common                    3.0.3-0-2
XEN administrative tools - common files
ii  xenman                              0.5-2.1
A graphical Xen management tool

$ more /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

auto eth0
allow-hotplug eth0
iface eth0 inet static
#       <snip> normal static eth config</snip>

auto xenbr0
iface xenbr0 inet static
        pre-up brctl addbr xenbr0
        post-down brctl delbr xenbr0
        bridge_fd 0
        bridge_hello 0
        bridge_stp off

$ grep vif /etc/xen/mywindowsxp.hvm
vif = [ 'type=ioemu, mac=00:16:3e:08:df:13, bridge=xenbr0' ]

-----Original Message-----
From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx
[mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Denny
Schierz
Sent: Friday, 04 May, 2007 3:15 PM
To: 'xen-users@xxxxxxxxxxxxxxxxxxx'
Subject: [Xen-users] network-bridge problem (maybe debian etch related)

hi,

i installed xen 3. from Debian Etch etc on a very small installation:

dom0:~# dpkg -l | grep xen | cut -d' ' -f 3 libc6-xen
linux-image-2.6-xen-686
linux-image-2.6.18-4-xen-686
linux-image-xen-686
linux-modules-2.6.18-4-xen-686
xen-hypervisor-3.0.3-1-i386
xen-hypervisor-3.0.3-1-i386-pae
xen-tools
xen-utils-3.0.3-1


After that, i changed /etc/xen/xend-config.conf from:

(network-script network-dummy)
#(network-script network-bridge)

to:

#(network-script network-dummy)
(network-script network-bridge)

i have one network card (vmware) eth0:

# The primary network interface
auto eth0
iface eth0 inet static
address 192.168.3.223
netmask 255.255.255.0
gateway 192.168.3.254

Now i starting the Xen environment and i get the following network
configuration:

1: lo: <LOOPBACK,UP,10000> mtu 16436 qdisc noqueue
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
2: peth0: <BROADCAST,NOARP,UP,10000> mtu 1500 qdisc pfifo_fast qlen 1000
    link/ether fe:ff:ff:ff:ff:ff brd ff:ff:ff:ff:ff:ff
    inet6 fe80::fcff:ffff:feff:ffff/64 scope link
       valid_lft forever preferred_lft forever
3: sit0: <NOARP> mtu 1480 qdisc noop
    link/sit 0.0.0.0 brd 0.0.0.0
4: vif0.0: <BROADCAST,NOARP,UP,10000> mtu 1500 qdisc noqueue
    link/ether fe:ff:ff:ff:ff:ff brd ff:ff:ff:ff:ff:ff
    inet6 fe80::fcff:ffff:feff:ffff/64 scope link
       valid_lft forever preferred_lft forever
5: eth0: <BROADCAST,MULTICAST,UP,10000> mtu 1500 qdisc noqueue
    link/ether 00:0c:29:fa:91:67 brd ff:ff:ff:ff:ff:ff
    inet 192.168.3.223/24 brd 192.168.3.255 scope global eth0
    inet6 fe80::20c:29ff:fefa:9167/64 scope link
       valid_lft forever preferred_lft forever
6: vif0.1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop
    link/ether fe:ff:ff:ff:ff:ff brd ff:ff:ff:ff:ff:ff
7: veth1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop
    link/ether 00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff
8: vif0.2: <BROADCAST,MULTICAST> mtu 1500 qdisc noop
    link/ether fe:ff:ff:ff:ff:ff brd ff:ff:ff:ff:ff:ff
9: veth2: <BROADCAST,MULTICAST> mtu 1500 qdisc noop
    link/ether 00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff
10: vif0.3: <BROADCAST,MULTICAST> mtu 1500 qdisc noop
    link/ether fe:ff:ff:ff:ff:ff brd ff:ff:ff:ff:ff:ff
11: veth3: <BROADCAST,MULTICAST> mtu 1500 qdisc noop
    link/ether 00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff
12: xenbr0: <BROADCAST,NOARP,UP,10000> mtu 1500 qdisc noqueue
    link/ether fe:ff:ff:ff:ff:ff brd ff:ff:ff:ff:ff:ff
    inet6 fe80::200:ff:fe00:0/64 scope link
       valid_lft forever preferred_lft forever

You can see, the eth0 has the IP 233.

The bridge config looks like:

bridge name     bridge id               STP enabled     interfaces
xenbr0          8000.feffffffffff       no              vif0.0
                                                        peth0 So,
everything looks normal and is, how i expected. But, what does not work,
is the network ... I can't ping (or anything else) from Dom0 to the
outside. I did not installed DomUs, until i understand, what is the
problem.

If i stop the network-bridge script, the network works well again.

Maybe, this is a Debian Etch problem, but it would be nice, to fix it
:-)

So, does anybody know what can be the problem?

cu denny


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