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From: Rus Hughes <russell.hughes@gmail.com>
To: kvm@vger.kernel.org
Subject: KVM Bridged Networking Issue in Ubuntu Lucid
Date: Tue, 24 Aug 2010 15:08:30 +0100	[thread overview]
Message-ID: <AANLkTi=kaqjz6xoxkyDyfAxmwOeM0YSpmLFy5G3+phkc@mail.gmail.com> (raw)

Hi guys,

I'm trying to sort out networking for a VM I've created on my Ubuntu
Lucid box but the VM cannot access the Internet.
I can connect to the VM (crisps) from the host (holly) and to the host
from the VM.
But the VM cannot connect to the Internet and the Internet cannot
connect to the VM.

I followed the guide here: https://help.ubuntu.com/community/KVM

I created it using ubuntu-vm-builder using :

ubuntu-vm-builder kvm lucid \
                  --domain crisps \
                  --dest crisps \
                  --arch amd64 \
                  --hostname crisps \
                  --mem 2048 \
                  --rootsize 4096 \
                  --swapsize 1024 \
                  --user magicalusernameofdoom \
                  --pass somesecretawesomepassword \
                  --ip 178.63.60.159 \
                  --mask 255.255.255.192 \
                  --bcast 178.63.60.191 \
                  --gw 178.63.60.129 \
                  --dns 213.133.99.99 \
                  --mirror http://de.archive.ubuntu.com/ubuntu \
                  --components main,universe,restricted,multiverse \
                  --addpkg openssh-server \
                  --libvirt qemu:///system \
                --bridge br0;

"virsh start crisps" starts the vm up :

root     29297  0.5  3.3 2280396 271220 ?      Sl   14:12   0:13
/usr/bin/kvm -S -M pc-0.12 -enable-kvm -m 2048 -smp 1 -name crisps
-uuid e2cda480-29e7-3740-d6c6-816e2f78223e -chardev
socket,id=monitor,path=/var/lib/libvirt/qemu/crisps.monitor,server,nowait
-monitor chardev:monitor -boot c -drive
file=/home/idimmu/vms/crisps/tmplXQBtt.qcow2,if=ide,index=0,boot=on
-net nic,macaddr=52:54:00:a6:28:b9,vlan=0,model=virtio,name=virtio.0
-net tap,fd=41,vlan=0,name=tap.0 -serial none -parallel none -usb -vnc
127.0.0.1:0 -vga cirrus

Networking on the host is like so:

br0       Link encap:Ethernet  HWaddr 26:5d:c9:d2:75:2e
          inet addr:178.63.60.138  Bcast:178.63.60.191  Mask:255.255.255.192
          inet6 addr: fe80::4261:86ff:fee9:d69a/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:49080900 errors:0 dropped:0 overruns:0 frame:0
          TX packets:54086580 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:35266886777 (35.2 GB)  TX bytes:60292047383 (60.2 GB)

eth0      Link encap:Ethernet  HWaddr 40:61:86:e9:d6:9a
          inet6 addr: fe80::4261:86ff:fee9:d69a/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:49418744 errors:0 dropped:0 overruns:0 frame:0
          TX packets:54348661 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:36337218359 (36.3 GB)  TX bytes:60378047518 (60.3 GB)
          Interrupt:29 Base address:0x4000

eth0:0    Link encap:Ethernet  HWaddr 40:61:86:e9:d6:9a
          inet addr:178.63.60.178  Bcast:178.63.60.191  Mask:255.255.255.192
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          Interrupt:29 Base address:0x4000

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:1063249 errors:0 dropped:0 overruns:0 frame:0
          TX packets:1063249 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:325111540 (325.1 MB)  TX bytes:325111540 (325.1 MB)

vnet0     Link encap:Ethernet  HWaddr 26:5d:c9:d2:75:2e
          inet6 addr: fe80::245d:c9ff:fed2:752e/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:72 errors:0 dropped:0 overruns:0 frame:0
          TX packets:33 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:500
          RX bytes:3412 (3.4 KB)  TX bytes:2698 (2.6 KB)

the hosts /etc/network/interfaces is like so :

auto lo
iface lo inet loopback

# device: eth0
auto  eth0
iface eth0 inet manual

auto br0
iface br0 inet static
  address   178.63.60.138
  broadcast 178.63.60.191
  netmask   255.255.255.192
  gateway   178.63.60.129
  network 178.63.60.128
  bridge_ports eth0
  bridge_stp off
  bridge_fd 0
  bridge_maxwait 0

# subli.me.uk
auto eth0:0
iface eth0:0 inet static
  address 178.63.60.178
  netmask 255.255.255.192


If I ping the VM I see the packets on the host br0 but not vnet0, this
is the output of brctl show on the host :

bridge name     bridge id               STP enabled     interfaces
br0             8000.265dc9d2752e       no              eth0

     vnet0
this is the routing table on the host

Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
178.63.60.128   0.0.0.0         255.255.255.192 U     0      0        0 br0
0.0.0.0         178.63.60.129   0.0.0.0         UG    100    0        0 br0

this is the routing table on the VM

Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
178.63.60.128   0.0.0.0         255.255.255.192 U     0      0        0 eth0
0.0.0.0         178.63.60.129   0.0.0.0         UG    100    0        0 eth0

and the VM's network configuration

eth0      Link encap:Ethernet  HWaddr 52:54:00:a6:28:b9
          inet addr:178.63.60.159  Bcast:178.63.60.191  Mask:255.255.255.192
          inet6 addr: fe80::5054:ff:fea6:28b9/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:777 errors:0 dropped:0 overruns:0 frame:0
          TX packets:319 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:968410 (968.4 KB)  TX bytes:29662 (29.6 KB)

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:37 errors:0 dropped:0 overruns:0 frame:0
          TX packets:37 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:3412 (3.4 KB)  TX bytes:3412 (3.4 KB)

and this is crisps.xml

<domain type='kvm'>
  <name>crisps</name>
  <uuid>e2cda480-29e7-3740-d6c6-816e2f78223e</uuid>
  <memory>2097152</memory>
  <currentMemory>2097152</currentMemory>
  <vcpu>1</vcpu>
  <os>
    <type arch='x86_64' machine='pc-0.12'>hvm</type>
    <boot dev='hd'/>
  </os>
  <features>
    <acpi/>
  </features>
  <clock offset='utc'/>
  <on_poweroff>destroy</on_poweroff>
  <on_reboot>restart</on_reboot>
  <on_crash>destroy</on_crash>
  <devices>
    <emulator>/usr/bin/kvm</emulator>
    <disk type='file' device='disk'>
      <source file='/home/idimmu/vms/crisps/tmplXQBtt.qcow2'/>
      <target dev='hda' bus='ide'/>
    </disk>
    <interface type='bridge'>
      <mac address='52:54:00:a6:28:b9'/>
      <source bridge='br0'/>
      <model type='virtio'/>
    </interface>
    <input type='mouse' bus='ps2'/>
    <graphics type='vnc' port='-1' autoport='yes' listen='127.0.0.1'/>
    <video>
      <model type='cirrus' vram='9216' heads='1'/>
    </video>
  </devices>
</domain>

im completely out of ideas and any help would be appreciated!

Cheers,

Rus

             reply	other threads:[~2010-08-24 14:08 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-08-24 14:08 Rus Hughes [this message]
2010-08-24 17:03 ` KVM Bridged Networking Issue in Ubuntu Lucid Brian Jackson
2010-08-25  2:08 ` haishan
2010-08-25 17:42   ` Rus Hughes

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