Re: [Xen-users] how to enable dom0 and domu share same physical network...

[Lukas Laukamp <lukas@xxxxxxxxxx>]

Am 28.11.2012 19:39, schrieb Tapdiya, Ashish:

Hi,

I have two physical machines connected through a switch in a 192.168.1.* subnet. Dom0's are assigned static ip addresses 192.168.1.100, 192.168.1.101 respectively. Dom0's can ping each other. Each physical machine has a domu guest and static address assigned to domu's are 192.168.1.200, 192.168.1.201 respectively.

However domu's can neither ping each other nor dom0's. Similarly dom0's cannot ping domu's. Following are my configuration specifics:

In /etc/xen/xend-config.sxp following entries are enabled
network-script network-bridge
vif-script vif-bridge

Domu's /etc/network/interfaces static ip is assigned like this
auto eth0
iface eth0 inet static
address 192.168.1.200
netmask 255.255.255.0
gateway 192.168.1.2

if dom-u creation config file vif entry is as follows,
vif = ['ip=192.168.1.200']

How to enable domu's to share same physical network and become part of 192.168.1.* subnet.

Any help or pointer will be highly appreciated.

Thanks.
 
 

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Hello,

so the right scripts are set in xend-config.sxp. Does the system create a correct bridge and connects the DomU devices to the bridge when the DomU starts?

So in the case of a Debian/Ubuntu system you can do this very easy manually on this way:

Open /etc/network/interfaces with an editor and put in something like this:

auto lo
iface lo inet loopback

auto eth0
iface eth0 inet manual

auto xenbr0
iface xenbr0 inet static
    address IP
    netmask NETMASK
    gateway GATEWAY
    bridge_ports eth0
    bridge_stp off
    bridge_fd 0

Then restart the network:

/etc/init.d/networking restart

Before you do this comment out the network-script network-bridge line in xend-config.sxp.

The vif line would look like this:

vif = ['ip=IP,bridge=xenbr0']

Then should the DomU be able to communicate with the physical network.

The bridge-utils must be installed for this. For Red Hat based distributions you have to create a network script for eth0 and for the bridge. For any other distribution you can look in the documentation how to create bridges.

Best Regards

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