I try to configure bridge network for KVM(refer to http://www.linux-kvm.org/page/Networking), and it worked for Guest OS, but I have two problems with my Fedora host OS:
1、I can not access internet on host
2、The bridge configuration lost after reboot, I need to execute "service network restart" again to bring it up
I checked here(KVM network bridge with public static IP for both host and guests) for the first problem, it seems not working for me.
Any advice is appreciated!
ifconfig -a
eth0 Link encap:Ethernet HWaddr 48:5B:39:ED:EB:5A
inet6 addr: fe80::4a5b:39ff:feed:eb5a/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:231340 errors:0 dropped:0 overruns:0 frame:0
TX packets:413424 errors:0 dropped:0 overruns:0 carrier:1
collisions:0 txqueuelen:1000
RX bytes:15335606 (14.6 MiB) TX bytes:114755796 (109.4 MiB)
Interrupt:44
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:119307 errors:0 dropped:0 overruns:0 frame:0
TX packets:119307 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:57151264 (54.5 MiB) TX bytes:57151264 (54.5 MiB)
sit0 Link encap:IPv6-in-IPv4
NOARP MTU:1480 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 txqueuelen:0
RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)
sw0 Link encap:Ethernet HWaddr 48:5B:39:ED:EB:5A
inet addr:192.168.1.133 Bcast:255.255.255.255 Mask:255.255.255.0
inet6 addr: fe80::4a5b:39ff:feed:eb5a/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:229584 errors:0 dropped:0 overruns:0 frame:0
TX packets:401232 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:11047463 (10.5 MiB) TX bytes:113891533 (108.6 MiB)
tap0 Link encap:Ethernet HWaddr F2:86:1A:48:E2:55
inet6 addr: fe80::f086:1aff:fe48:e255/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:232 errors:0 dropped:0 overruns:0 frame:0
TX packets:2744 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:500
RX bytes:24842 (24.2 KiB) TX bytes:243899 (238.1 KiB)
virbr0 Link encap:Ethernet HWaddr 9A:7C:09:6B:85:65
inet addr:192.168.122.1 Bcast:192.168.122.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:46 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 b) TX bytes:5513 (5.3 KiB)
Best Answer
I am giving you my /etc/network/interfaces file where I configured a bridge to use with four VMs on Ubuntu server which also uses KVM (my default lan card is 3rd i.e. 0,1,2,3 so eth2 is used)
The above is a correct configuration.You might need to check /etc/network/interfaces manual page http://manpages.ubuntu.com/manpages/hardy/man5/interfaces.5.html to understand what the keyword manual in above does.
Post your network interfaces file where you defined bridge then we will be able to help.
I noticed your eth0 and sw0 are having same Mac address. Bridge works on Layer2 that might be source of your problem (some one correct me if I am wrong) and eth0 has IPv6 address where as sw0 has IPv4 address.This is not correct.