[Bug 616064] Re: Broken networking in kvm guests

Anthony O. 616064 at bugs.launchpad.net
Tue Dec 20 09:23:14 UTC 2011 

OK, here it is. I'm running 6 VM currently.

admin at vs-master:~$ sudo ifconfig -a
br0       Link encap:Ethernet  HWaddr 00:22:19:35:22:71  
          inet adr:192.168.1.200  Bcast:192.168.1.255  Masque:255.255.255.0
          adr inet6: fe80::222:19ff:fe35:2271/64 Scope:Lien
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          Packets reçus:95710 erreurs:0 :0 overruns:0 frame:0
          TX packets:67249 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 lg file transmission:0 
          Octets reçus:51492467 (51.4 MB) Octets transmis:55864935 (55.8 MB)

br1       Link encap:Ethernet  HWaddr 00:22:19:35:22:6f  
          inet adr:192.168.2.21  Bcast:192.168.2.255  Masque:255.255.255.0
          BROADCAST MULTICAST  MTU:1500  Metric:1
          Packets reçus:22299 erreurs:0 :0 overruns:0 frame:0
          TX packets:6481 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 lg file transmission:0 
          Octets reçus:1537273 (1.5 MB) Octets transmis:40531900 (40.5 MB)


eth0      Link encap:Ethernet  HWaddr 00:22:19:35:22:6b  
          BROADCAST MULTICAST  MTU:1500  Metric:1
          Packets reçus:0 erreurs:0 :0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 lg file transmission:1000 
          Octets reçus:0 (0.0 B) Octets transmis:0 (0.0 B)
          Interruption:36 Mémoire:d6000000-d6012800 

eth1      Link encap:Ethernet  HWaddr 00:22:19:35:22:6d  
          BROADCAST MULTICAST  MTU:1500  Metric:1
          Packets reçus:0 erreurs:0 :0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 lg file transmission:1000 
          Octets reçus:0 (0.0 B) Octets transmis:0 (0.0 B)
          Interruption:48 Mémoire:d8000000-d8012800 

eth2      Link encap:Ethernet  HWaddr 00:22:19:35:22:6f  
          BROADCAST MULTICAST  MTU:1500  Metric:1
          Packets reçus:24586 erreurs:0 :0 overruns:0 frame:0
          TX packets:30777 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 lg file transmission:1000 
          Octets reçus:2203691 (2.2 MB) Octets transmis:42258310 (42.2 MB)
          Interruption:32 Mémoire:da000000-da012800 

eth3      Link encap:Ethernet  HWaddr 00:22:19:35:22:71  
          adr inet6: fe80::222:19ff:fe35:2271/64 Scope:Lien
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          Packets reçus:197822 erreurs:0 :0 overruns:0 frame:0
          TX packets:213737 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 lg file transmission:1000 
          Octets reçus:98213440 (98.2 MB) Octets transmis:109634754 (109.6 MB)
          Interruption:42 Mémoire:dc000000-dc012800 

lo        Link encap:Boucle locale  
          inet adr:127.0.0.1  Masque:255.0.0.0
          adr inet6: ::1/128 Scope:Hôte
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          Packets reçus:8506746 erreurs:0 :0 overruns:0 frame:0
          TX packets:8506746 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 lg file transmission:0 
          Octets reçus:1436414752 (1.4 GB) Octets transmis:1436414752 (1.4 GB)

virbr1    Link encap:Ethernet  HWaddr fe:54:00:0f:30:ea  
          inet adr:192.168.122.1  Bcast:192.168.122.255  Masque:255.255.255.0
          adr inet6: fe80::e4d6:60ff:feef:da37/64 Scope:Lien
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          Packets reçus:942 erreurs:0 :0 overruns:0 frame:0
          TX packets:6616 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 lg file transmission:0 
          Octets reçus:107593 (107.5 KB) Octets transmis:311979 (311.9 KB)

vnet0     Link encap:Ethernet  HWaddr fe:54:00:e1:15:e3  
          adr inet6: fe80::fc54:ff:fee1:15e3/64 Scope:Lien
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          Packets reçus:833 erreurs:0 :0 overruns:0 frame:0
          TX packets:115303 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 lg file transmission:500 
          Octets reçus:522334 (522.3 KB) Octets transmis:6320774 (6.3 MB)

vnet1     Link encap:Ethernet  HWaddr fe:54:00:3c:1c:83  
          adr inet6: fe80::fc54:ff:fe3c:1c83/64 Scope:Lien
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          Packets reçus:24437 erreurs:0 :0 overruns:0 frame:0
          TX packets:143771 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 lg file transmission:500 
          Octets reçus:2493295 (2.4 MB) Octets transmis:39947808 (39.9 MB)

vnet2     Link encap:Ethernet  HWaddr fe:54:00:12:e3:be  
          adr inet6: fe80::fc54:ff:fe12:e3be/64 Scope:Lien
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          Packets reçus:4524 erreurs:0 :0 overruns:0 frame:0
          TX packets:116971 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 lg file transmission:500 
          Octets reçus:282843 (282.8 KB) Octets transmis:9219200 (9.2 MB)

vnet3     Link encap:Ethernet  HWaddr fe:54:00:5e:bc:08  
          adr inet6: fe80::fc54:ff:fe5e:bc08/64 Scope:Lien
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          Packets reçus:4653 erreurs:0 :0 overruns:0 frame:0
          TX packets:116981 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 lg file transmission:500 
          Octets reçus:266574 (266.5 KB) Octets transmis:9337139 (9.3 MB)

vnet4     Link encap:Ethernet  HWaddr fe:16:3e:4b:87:ad  
          adr inet6: fe80::fc16:3eff:fe4b:87ad/64 Scope:Lien
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          Packets reçus:149850 erreurs:0 :0 overruns:0 frame:0
          TX packets:156434 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 lg file transmission:500 
          Octets reçus:81969378 (81.9 MB) Octets transmis:48685476 (48.6 MB)

vnet5     Link encap:Ethernet  HWaddr fe:54:00:0f:30:ea  
          adr inet6: fe80::fc54:ff:fe0f:30ea/64 Scope:Lien
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          Packets reçus:942 erreurs:0 :0 overruns:0 frame:0
          TX packets:182770 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 lg file transmission:500 
          Octets reçus:120781 (120.7 KB) Octets transmis:9351306 (9.3 MB)

vnet6     Link encap:Ethernet  HWaddr fe:54:00:49:34:30  
          adr inet6: fe80::fc54:ff:fe49:3430/64 Scope:Lien
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          Packets reçus:54970 erreurs:0 :0 overruns:0 frame:0
          TX packets:160868 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 lg file transmission:500 
          Octets reçus:43593053 (43.5 MB) Octets transmis:17125087 (17.1 MB)

Don't take into account br1 and eth2 which are now disabled, I used them
to try to connect my server directly from the same network as my client
machine in network 192.168.2.0 but didn't manage to (routing
configuration problem I think). I had my stick download problem before
that test.

admin at vs-master:~$ sudo netstat -nr
Table de routage IP du noyau
Destination     Passerelle      Genmask         Indic   MSS Fenêtre irtt Iface
192.168.1.0     0.0.0.0         255.255.255.0   U         0 0          0 br0
192.168.122.0   0.0.0.0         255.255.255.0   U         0 0          0 virbr1
0.0.0.0         192.168.1.254   0.0.0.0         UG        0 0          0 br0

As I said in a previous post, I've got a VM which is used for a small
production software, will the instructions in comment #33 (+#35) will
make that VM unreachable during a time ?

Thanks

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Title:
  Broken networking in kvm guests

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