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[Xen-users] new user: "connect: Network is unreachable" error

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Subject: [Xen-users] new user: "connect: Network is unreachable" error
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Date: Thu, 22 Dec 2005 18:45:53 +0100
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Hello,

I have installed XEN 3.0 on a well-configured Ubuntu system, from source. The process went well. The machine has one PCI ethernet card.

Now my problem is that when I boot the XEN machine, the domU domains do not ping each other nor see the outside world. However, dom0 reaches the outer world but not the inner domains. After booting, launching xend and starting a VM, it seems to me that the bridge becomes peth0 that does not its work. I am using a simple bridge to connext the VMs with each one having a static IP.

If someone could shed some light on this, I'd be grateful!

thanks
Armand

___________________________________________________________________________________

Config: dom0 has the following network parameters:
$cat /etc/network/interfaces
mapping hotplug
       script grep
       map eth0

iface eth0 inet static
       address 132.166.133.218
       netmask 255.255.252.0
       network 132.166.132.0
       broadcast 132.166.135.255
       gateway 132.166.135.254
# dns-* options are implemented by the resolvconf package, if installed
       dns-nameservers 132.166.192.7
       dns-search ...

VM1 of domU is started with the following config :

kernel = "/boot/vmlinuz-2.6.12-xenU"
memory = 64
name = "VM%d" % vmid
cpu = vmid
vcpus = 1
nics=1
vif = [ 'mac=aa:00:00:00:00:11, bridge=xenbr0' ]
disk = [ 'file:/boot/VM/vm1disk,hda1,w' ]
netmask="255.255.252.0"
gateway="132.166.135.254"
root = "/dev/hda1 ro"

Note that virtual file systems are used by each VM.



Now the network config at 3 different steps:

-------------------------------------------- Just after boot--------------------------------------

$ifconfig -a

eth0      Lien encap:Ethernet  HWaddr 00:06:5B:01:C6:A3
inet adr:132.166.133.218 Bcast:132.166.135.255 Masque:255.255.252.0
         UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
         RX packets:900 errors:0 dropped:0 overruns:247 frame:0
         TX packets:243 errors:0 dropped:0 overruns:0 carrier:0
         collisions:0 lg file transmission:1000
         RX bytes:120896 (118.0 KiB)  TX bytes:21414 (20.9 KiB)
         Interruption:18 Adresse de base:0xdc80

lo        Lien encap:Boucle locale
         inet adr:127.0.0.1  Masque:255.0.0.0
         UP LOOPBACK RUNNING  MTU:16436  Metric:1
         RX packets:1175 errors:0 dropped:0 overruns:0 frame:0
         TX packets:1175 errors:0 dropped:0 overruns:0 carrier:0
         collisions:0 lg file transmission:0
         RX bytes:74704 (72.9 KiB)  TX bytes:74704 (72.9 KiB)

veth0     Lien encap:Ethernet  HWaddr 00:00:00:00:00:00
         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 lg file transmission:0
         RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

veth1     Lien encap:Ethernet  HWaddr 00:00:00:00:00:00
         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 lg file transmission:0
         RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

veth2     Lien encap:Ethernet  HWaddr 00:00:00:00:00:00
         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 lg file transmission:0
         RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

veth3     Lien encap:Ethernet  HWaddr 00:00:00:00:00:00
         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 lg file transmission:0
         RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

veth4     Lien encap:Ethernet  HWaddr 00:00:00:00:00:00
         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 lg file transmission:0
         RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

veth5     Lien encap:Ethernet  HWaddr 00:00:00:00:00:00
         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 lg file transmission:0
         RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

veth6     Lien encap:Ethernet  HWaddr 00:00:00:00:00:00
         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 lg file transmission:0
         RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

veth7     Lien encap:Ethernet  HWaddr 00:00:00:00:00:00
         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 lg file transmission:0
         RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

vif0.0    Lien encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
         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 lg file transmission:0
         RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

vif0.1    Lien encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
         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 lg file transmission:0
         RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

vif0.2    Lien encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
         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 lg file transmission:0
         RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

vif0.3    Lien encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
         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 lg file transmission:0
         RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

vif0.4    Lien encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
         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 lg file transmission:0
         RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

vif0.5    Lien encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
         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 lg file transmission:0
         RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

vif0.6    Lien encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
         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 lg file transmission:0
         RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

vif0.7    Lien encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
         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 lg file transmission:0
         RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

$brctl show

bridge name     bridge id               STP enabled     interfaces
lambda@cygne12:~$

------------------------- just after launching the /etc/xen/scripts/network-bridge script ----

$ ifconfig -a

eth0      Lien encap:Ethernet  HWaddr 00:06:5B:01:C6:A3
inet adr:132.166.133.218 Bcast:132.166.135.255 Masque:255.255.252.0
         UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
         RX packets:337 errors:0 dropped:0 overruns:0 frame:0
         TX packets:5 errors:0 dropped:0 overruns:0 carrier:0
         collisions:0 lg file transmission:0
         RX bytes:41271 (40.3 KiB)  TX bytes:354 (354.0 b)

lo        Lien encap:Boucle locale
         inet adr:127.0.0.1  Masque:255.0.0.0
         UP LOOPBACK RUNNING  MTU:16436  Metric:1
         RX packets:2431 errors:0 dropped:0 overruns:0 frame:0
         TX packets:2431 errors:0 dropped:0 overruns:0 carrier:0
         collisions:0 lg file transmission:0
         RX bytes:188807 (184.3 KiB)  TX bytes:188807 (184.3 KiB)

peth0     Lien encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
         UP BROADCAST RUNNING NOARP MULTICAST  MTU:1500  Metric:1
         RX packets:2390 errors:0 dropped:0 overruns:247 frame:0
         TX packets:278 errors:0 dropped:0 overruns:0 carrier:0
         collisions:0 lg file transmission:1000
         RX bytes:277130 (270.6 KiB)  TX bytes:24156 (23.5 KiB)
         Interruption:18 Adresse de base:0xdc80

WHAT'S THAT peth0 USED FOR???? WHERE IS IT CONNECTED TO THE PORTS???

veth1     Lien encap:Ethernet  HWaddr 00:00:00:00:00:00
         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 lg file transmission:0
         RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

veth2     Lien encap:Ethernet  HWaddr 00:00:00:00:00:00
         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 lg file transmission:0
         RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

veth3     Lien encap:Ethernet  HWaddr 00:00:00:00:00:00
         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 lg file transmission:0
         RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

veth4     Lien encap:Ethernet  HWaddr 00:00:00:00:00:00
         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 lg file transmission:0
         RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

veth5     Lien encap:Ethernet  HWaddr 00:00:00:00:00:00
         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 lg file transmission:0
         RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

veth6     Lien encap:Ethernet  HWaddr 00:00:00:00:00:00
         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 lg file transmission:0
         RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

veth7     Lien encap:Ethernet  HWaddr 00:00:00:00:00:00
         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 lg file transmission:0
         RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

vif0.0    Lien encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
         UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
         RX packets:5 errors:0 dropped:0 overruns:0 frame:0
         TX packets:337 errors:0 dropped:0 overruns:0 carrier:0
         collisions:0 lg file transmission:0
         RX bytes:354 (354.0 b)  TX bytes:41271 (40.3 KiB)

vif0.1    Lien encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
         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 lg file transmission:0
         RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

vif0.2    Lien encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
         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 lg file transmission:0
         RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

vif0.3    Lien encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
         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 lg file transmission:0
         RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

vif0.4    Lien encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
         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 lg file transmission:0
         RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

vif0.5    Lien encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
         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 lg file transmission:0
         RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

vif0.6    Lien encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
         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 lg file transmission:0
         RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

vif0.7    Lien encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
         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 lg file transmission:0
         RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

xenbr0    Lien encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
         UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
         RX packets:313 errors:0 dropped:0 overruns:0 frame:0
         TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
         collisions:0 lg file transmission:0
         RX bytes:29378 (28.6 KiB)  TX bytes:0 (0.0 b)

$brctl show

bridge name     bridge id               STP enabled     interfaces
xenbr0          8000.feffffffffff       no              peth0
                                                       vif0.0

--------------------- Finally, after running 'xend start' and launching a domU with 1 VM with IP=132.166.133.220

dom0:

$ xm create -c /etc/xen/myexample1 vmid=1

$ ifconfig -a

eth0      Lien encap:Ethernet  HWaddr 00:06:5B:01:C6:A3
inet adr:132.166.133.218 Bcast:132.166.135.255 Masque:255.255.252.0
         UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
         RX packets:4052 errors:0 dropped:0 overruns:0 frame:0
         TX packets:65 errors:0 dropped:0 overruns:0 carrier:0
         collisions:0 lg file transmission:0
         RX bytes:466116 (455.1 KiB)  TX bytes:4902 (4.7 KiB)

lo        Lien encap:Boucle locale
         inet adr:127.0.0.1  Masque:255.0.0.0
         UP LOOPBACK RUNNING  MTU:16436  Metric:1
         RX packets:5349 errors:0 dropped:0 overruns:0 frame:0
         TX packets:5349 errors:0 dropped:0 overruns:0 carrier:0
         collisions:0 lg file transmission:0
         RX bytes:452672 (442.0 KiB)  TX bytes:452672 (442.0 KiB)

peth0     Lien encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
         UP BROADCAST RUNNING NOARP MULTICAST  MTU:1500  Metric:1
         RX packets:16462 errors:0 dropped:0 overruns:247 frame:0
         TX packets:338 errors:0 dropped:0 overruns:0 carrier:0
         collisions:0 lg file transmission:1000
         RX bytes:16140955 (15.3 MiB)  TX bytes:28974 (28.2 KiB)
         Interruption:18 Adresse de base:0xdc80

veth1     Lien encap:Ethernet  HWaddr 00:00:00:00:00:00
         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 lg file transmission:0
         RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

veth2     Lien encap:Ethernet  HWaddr 00:00:00:00:00:00
         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 lg file transmission:0
         RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

veth3     Lien encap:Ethernet  HWaddr 00:00:00:00:00:00
         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 lg file transmission:0
         RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

veth4     Lien encap:Ethernet  HWaddr 00:00:00:00:00:00
         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 lg file transmission:0
         RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

veth5     Lien encap:Ethernet  HWaddr 00:00:00:00:00:00
         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 lg file transmission:0
         RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

veth6     Lien encap:Ethernet  HWaddr 00:00:00:00:00:00
         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 lg file transmission:0
         RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

veth7     Lien encap:Ethernet  HWaddr 00:00:00:00:00:00
         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 lg file transmission:0
         RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

vif0.0    Lien encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
         UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
         RX packets:65 errors:0 dropped:0 overruns:0 frame:0
         TX packets:4052 errors:0 dropped:0 overruns:0 carrier:0
         collisions:0 lg file transmission:0
         RX bytes:4902 (4.7 KiB)  TX bytes:466116 (455.1 KiB)

vif0.1    Lien encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
         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 lg file transmission:0
         RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

vif0.2    Lien encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
         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 lg file transmission:0
         RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

vif0.3    Lien encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
         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 lg file transmission:0
         RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

vif0.4    Lien encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
         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 lg file transmission:0
         RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

vif0.5    Lien encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
         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 lg file transmission:0
         RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

vif0.6    Lien encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
         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 lg file transmission:0
         RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

vif0.7    Lien encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
         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 lg file transmission:0
         RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

vif1.0    Lien encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
         UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
         RX packets:0 errors:0 dropped:0 overruns:0 frame:0
         TX packets:0 errors:0 dropped:964 overruns:0 carrier:0
         collisions:0 lg file transmission:0
         RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

xenbr0    Lien encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
         UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
         RX packets:3673 errors:0 dropped:0 overruns:0 frame:0
         TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
         collisions:0 lg file transmission:0
         RX bytes:319691 (312.1 KiB)  TX bytes:0 (0.0 b)

$ brctl show

bridge name     bridge id               STP enabled     interfaces
xenbr0          8000.feffffffffff       no              peth0
                                                       vif0.0
                                                       vif1.0

$ ping 132.166.133.220
PING 132.166.133.220 (132.166.133.220) 56(84) bytes of data.
From 132.166.133.218 icmp_seq=2 Destination Host Unreachable
From 132.166.133.218 icmp_seq=3 Destination Host Unreachable
From 132.166.133.218 icmp_seq=4 Destination Host Unreachable
...


dom1:

$ifconfig -a

eth0      Lien encap:Ethernet  HWaddr AA:00:00:00:00:11
         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 lg file transmission:1000
         RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

lo        Lien encap:Boucle locale
         inet adr:127.0.0.1  Masque:255.0.0.0
         UP LOOPBACK RUNNING  MTU:16436  Metric:1
         RX packets:47 errors:0 dropped:0 overruns:0 frame:0
         TX packets:47 errors:0 dropped:0 overruns:0 carrier:0
         collisions:0 lg file transmission:0
         RX bytes:3140 (3.0 KiB)  TX bytes:3140 (3.0 KiB)

$ping localhost
OK
$ ping 132.166.133.218
connect: Network is unreachable

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