# virt-install --connect xen --name vm0002_pppoe --ram 2048 --arch x86_64 --vcpus 1 --cpuset 1-7 --location http://10.255.0.1/f9/x86_64/img --os-type linux --os-variant rhel5.4 --disk path=/dev/drbd_x4_vg0/vm0002_1 --network bridge=xenbr0 --network bridge=xenbr2 --vnc --paravirt --debug

Fri, 29 Apr 2011 17:32:12 DEBUG    Requesting libvirt URI xen
Fri, 29 Apr 2011 17:32:12 ERROR    unable to connect to 'localhost:8000': Connection refused
Traceback (most recent call last):
  File "/usr/sbin/virt-install", line 892, in ?
    main()
  File "/usr/sbin/virt-install", line 628, in main
    conn = cli.getConnection(options.connect)
  File "/usr/lib/python2.4/site-packages/virtinst/cli.py", line 126, in getConnection
    conn = libvirt.open(connect)
  File "/usr/lib64/python2.4/site-packages/libvirt.py", line 169, in open
    if ret is None:raise libvirtError('virConnectOpen() failed')
libvirtError: unable to connect to 'localhost:8000': Connection refused