Hi Daniel, One more thing is that in my host machine vibr0 inteface is missing. Because of the the 'default' network is in 'inactive' state and if I tried to activate, it's giving the following error: error: Failed to start network default error: internal error '/usr/sbin/dnsmasq --strict-order --bind-interfaces --pid-file=/var/run/libvirt/network/default.pid --conf-file= --listen-address 192.168.122.1 --except-interface lo --dhcp-range 192.168.122.2,192.168.122.254' exited with non-zero status 2 and signal 0: dnsmasq: failed to bind listening socket for 192.168.122.1: Address already in use Can you please guide me in this regard? Regards, Srikanth. -----Original Message----- From: Kumar L Srikanth-B22348 Sent: Thursday, March 04, 2010 4:43 PM To: 'Daniel P. Berrange' Cc: libvir-list(a)redhat.com; Reddy B Veera-B22347 Subject: RE: Bringing up LXC container from virsh command prompt. Hi, I want to create eth0 network interface in the container, which is linked to br0 bridge in the host machine. For that, I have created a bridge 'br0' with the IP '172.16.1.10'. Now, I want to create a network interface eth0 in the container with the IP '172.16.1.17'. I created the following network XML for the above requirement. <network> <name>mynetwork</name> <uuid>3e3fce45-4f53-4fa7-bb32-11f34168b82b</uuid> <bridge name="br0" stp="on" delay="5"/> <forward mode="nat" dev="eth0"/> <ip address="172.16.1.17" netmask="255.255.255.0"/> </network> I am able to define the network, but unable to start the network. The following error is coming when I start the network with the following command: #virsh -c lxc:/// net-start mynetwork error: Failed to start network mynetwork error: cannot create bridge 'br0': File exists Can you please guide me to create a network? My network interfaces in the host machine is shown below: br0 Link encap:Ethernet HWaddr 00:50:BF:27:AA:60 inet addr:172.16.1.10 Bcast:172.16.255.255 Mask:255.255.0.0 inet6 addr: fe80::250:bfff:fe27:aa60/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:80728 errors:0 dropped:0 overruns:0 frame:0 TX packets:170078 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:54037401 (51.5 MiB) TX bytes:123567268 (117.8 MiB) eth0 Link encap:Ethernet HWaddr 00:50:BF:27:AA:60 inet6 addr: fe80::250:bfff:fe27:aa60/64 Scope:Link UP BROADCAST RUNNING PROMISC MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:288 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:0 (0.0 b) TX bytes:30108 (29.4 KiB) Interrupt:21 Base address:0x1140 eth1 Link encap:Ethernet HWaddr 00:16:76:4B:91:DC inet addr:192.168.1.10 Bcast:192.168.1.255 Mask:255.255.255.0 UP BROADCAST MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:0 (0.0 b) TX bytes:0 (0.0 b) eth2 Link encap:Ethernet HWaddr 00:11:95:FC:8D:62 inet addr:10.232.113.80 Bcast:10.232.113.255 Mask:255.255.254.0 inet6 addr: fe80::211:95ff:fefc:8d62/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:563988 errors:0 dropped:0 overruns:0 frame:0 TX packets:391293 errors:1100 dropped:0 overruns:0 carrier:1100 collisions:188525 txqueuelen:1000 RX bytes:565906426 (539.6 MiB) TX bytes:234291753 (223.4 MiB) Interrupt:22 Base address:0xa000 lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:23001 errors:0 dropped:0 overruns:0 frame:0 TX packets:23001 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:3478027 (3.3 MiB) TX bytes:3478027 (3.3 MiB) Regards, Srikanth. -----Original Message----- From: Daniel P. Berrange [mailto:berrange@redhat.com] Sent: Thursday, March 04, 2010 3:41 PM To: Kumar L Srikanth-B22348 Cc: libvir-list(a)redhat.com; Reddy B Veera-B22347 Subject: Re: Bringing up LXC container from virsh command prompt. On Thu, Mar 04, 2010 at 03:38:43PM +0530, Kumar L Srikanth-B22348 wrote: The lxc-XXX tools are completely unrelated. They have a configuration file where you specify what network interfaces are created. Likewise if you use libvirt you need to specify what network interfaces are to be created. You need to setup $PATH in your container. Daniel -- |: Red Hat, Engineering, London -o- http://people.redhat.com/berrange/ :| |: http://libvirt.org -o- http://virt-manager.org -o- http://deltacloud.org :| |: http://autobuild.org -o- http://search.cpan.org/~danberr/ :| |: GnuPG: 7D3B9505 -o- F3C9 553F A1DA 4AC2 5648 23C1 B3DF F742 7D3B 9505 :|