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

Am 28.11.2012 19:39, schrieb Tapdiya, Ashish:

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

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

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.


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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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