[root@xen-1 ~]# xe vm-install template=Debian\ Wheezy\ 7.0\ \(64-bit\) new-name-label=Wheezy_64-bit_CLI
d48fe7f3-71cb-3e0e-2144-2f140018af48

[root@xen-1 ~]# xe vm-param-set uuid=d48fe7f3-71cb-3e0e-2144-2f140018af48 other-config:install-repository=http://ftp.us.debian.org/debian/dists/wheezy/main/installer-amd64/

[root@xen-1 ~]# xe network-list bridge=xapi0 
uuid ( RO)                : 9933df6c-0374-a535-5996-0ad58bc9af15
          name-label ( RW): MGT
    name-description ( RW): 
              bridge ( RO): xapi0

[root@xen-1 ~]# xe vif-create network-uuid=9933df6c-0374-a535-5996-0ad58bc9af15 vm-uuid=d48fe7f3-71cb-3e0e-2144-2f140018af48 mac=random device=0
c7e0f2dd-fa65-5a77-c243-4ec9a828a905

[root@xen-1 ~]# xe vm-start uuid=d48fe7f3-71cb-3e0e-2144-2f140018af48
The server failed to handle your request, due to an internal error.  The given message may give details useful for debugging the problem.
message: xenopsd internal error: VM = d48fe7f3-71cb-3e0e-2144-2f140018af48; domid = 14; Bootloader.Bad_error Traceback (most recent call last):
  File "/usr/bin/eliloader", line 1153, in ?
    sys.exit(main())
  File "/usr/bin/eliloader", line 1143, in main
    handle_first_boot(vm, img, args, other_config)
  File "/usr/bin/eliloader", line 872, in handle_first_boot
    kernel, ramdisk = debian_first_boot_handler(vm, repo_url, other_config)
  File "/usr/bin/eliloader", line 739, in debian_first_boot_handler
    fetchFile(vmlinuz_url, vmlinuz_file, pv_kernel_max_size)
  File "/usr/bin/eliloader", line 323, in fetchFile
    raise ResourceNotFound, source
__main__.ResourceNotFound