interface file for KVM ubuntu 10.10

Posted by Charles Thornton on Super User See other posts from Super User or by Charles Thornton
Published on 2010-12-30T11:03:53Z Indexed on 2010/12/30 11:56 UTC
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Filed under:

network

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problem

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setup

I am trying to setup KVM on Unbuntu 10.10

IFCONFIG DUMP:

hydra(~}$ifconfig

eth0

      Link encap:Ethernet  HWaddr 00:1b:fc:cb:77:eb
      inet addr:172.20.20.3  Bcast:172.20.20.255  Mask:255.255.255.0
      inet6 addr: fe80::21b:fcff:fecb:77eb/64 Scope:Link
      UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
      RX packets:1345 errors:0 dropped:0 overruns:0 frame:0
      TX packets:1541 errors:0 dropped:0 overruns:0 carrier:0
      collisions:0 txqueuelen:1000 
      RX bytes:820414 (820.4 KB)  TX bytes:317708 (317.7 KB)
      Interrupt:23 Base address:0xc000

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:8 errors:0 dropped:0 overruns:0 frame:0
      TX packets:8 errors:0 dropped:0 overruns:0 carrier:0
      collisions:0 txqueuelen:0 
      RX bytes:480 (480.0 B)  TX bytes:480 (480.0 B)

virbr0

      Link encap:Ethernet  HWaddr 0a:1e:fb:b4:77:84  
      inet addr:192.168.122.1  Bcast:192.168.122.255  Mask:255.255.255.0
      inet6 addr: fe80::81e:fbff:feb4:7784/64 Scope:Link
      UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
      RX packets:0 errors:0 dropped:0 overruns:0 frame:0
      TX packets:56 errors:0 dropped:0 overruns:0 carrier:0
      collisions:0 txqueuelen:0 
      RX bytes:0 (0.0 B)  TX bytes:8934 (8.9 KB)

hydra(~}$

QUESTION:: How should /etc/network/interfaces be setup?? The following attempt just kills my internet connection!

--------- /etc/network/interfaces -------------

# This file describes the network interfaces available on your system

# and how to activate them. For more information, see interfaces(5).

# The loopback network interface

auto lo iface lo inet loopback

# The primary network interface auto eth0 iface eth0 inet manual

auto br0

iface br0 inet static

    address 172.20.20.3
    netmask 255.255.255.0
    network 172.20.20.0
    broadcast 172.20.20.255
    gateway 172.20.20.1
    bridge_ports eth0
    bridge_fd 9
    bridge_hello 2
    bridge_maxage 12
    bridge_stp off

What am I doing wrong????

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