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I read a lot of tutorials (or at least try to be) but none is able to explain well how to configure networks for xen host.

my Dom0 has two interfaces eth0 (real interfaces) and virbr0 (I guess was created by bridge-utils )

  • eth0 192.168.1.254 #is static
  • virbr0 192.168.122.1 #i dont know where is the conf

Tutorials only indicate:

  1. Edit /etc/xen/xend-config.sxp and append this lines

    (network-script network-bridge) (vif-script vif-bridge)

  2. setup vif in the domU.cfg file

    ... vif = ['ip = 192.168.1.100'] # this is the ip i want ...

  3. setup interface on Guest /etc/network/interface the guest is a Ubuntu amd 12.04 setup with debootstrap utility

    auto eth0 iface eth0 inet static address 192.168.1.251 gateway 192.168.1.1 netmask 255.255.255.0

but i can't access to DomU network.

aditional info

$ brctl show bridge name bridge id STP enabled interfaces virbr0 8000.000000000000 yes Ubuntu 12.04.1 LTS x86_64 CPU: Xeon 5150 @ 2.66Ghz (x2) RAM: 20GB (Dom0 1024M)

Note: Xen was installated with sudo apt-get install xen-utils-4.1 xenwatch xen-tools xen-utils-common virtinst virt-viewer virt-manager bridge-utils

solution works only with xl toolstack

I configured my network as follows and seems to work well (apparently)

auto eth0 xenbr0 iface eth0 inet manual iface xenbr0 inet static bridge_ports eth0 bridge_stop on bridge_maxwait 1 address 192.168.1.254 netmask 255.255.255.0 gateway 192.168.1.1
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  • Old question. the xenbr0 posted at the end will only work with xl. I've never set the IP of the domu in the cfg file but always inside. Let the guest set its IP. Commented Apr 28, 2014 at 0:25

1 Answer 1

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For me this looks, that you used virt-manager to add the network setup. The virt-manager uses by default `192.168.122.0/24' network for VMs.

You might want to change the network configuration from the virt-managers menu: Edit->ConnectionDetails and then virtual-networks to fit to your needs.

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  • I dont have GUI. is Ubuntu Server Commented Jan 8, 2013 at 18:08
  • What means 'I dont have GUI'? As you wrote you installed virt-manager. This is the GUI. Commented Jan 8, 2013 at 19:27
  • yeah. sure was the tutorial where I read it, I thought it was a package for CLI Commented Jan 8, 2013 at 19:49

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