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risq
Tux's lil' helper
Joined: 03 Dec 2004
Posts: 75
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 Posted: Sun May 17, 2015 10:22 am Post subject: Bridge Networking VM |
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Hi gentoo-people,
i once figured out howto setup qemu bridge networking, but im lost now.
My current setup is this
| Code: | s1 ~ # ifconfig
br0: flags=4419<UP,BROADCAST,RUNNING,PROMISC,MULTICAST> mtu 1500
inet 10.0.0.10 netmask 255.255.0.0 broadcast 10.0.0.255
inet6 fe80::200:ff:fe00:1 prefixlen 64 scopeid 0x20<link>
ether 00:00:00:00:00:01 txqueuelen 0 (Ethernet)
RX packets 864323 bytes 3091316402 (2.8 GiB)
RX errors 0 dropped 12 overruns 0 frame 0
TX packets 429060 bytes 122861116 (117.1 MiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
enp0s25: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet6 fe80::be5f:f4ff:fefb:d5a5 prefixlen 64 scopeid 0x20<link>
ether bc:5f:f4:fb:d5:a5 txqueuelen 1000 (Ethernet)
RX packets 2488202 bytes 3195913307 (2.9 GiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 571631 bytes 138547949 (132.1 MiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
device interrupt 20 memory 0xf0400000-f0420000
lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
inet6 ::1 prefixlen 128 scopeid 0x10<host>
loop txqueuelen 0 (Local Loopback)
RX packets 1514 bytes 277957 (271.4 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 1514 bytes 277957 (271.4 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
tap0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
ether 00:00:00:00:00:01 txqueuelen 500 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
tap1: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
ether 00:00:00:00:00:02 txqueuelen 500 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 |
with
| Code: | s1 ~ # vi /etc/conf.d/net
# This blank configuration will automatically use DHCP for any net.*
# scripts in /etc/init.d. To create a more complete configuration,
# please review /usr/share/doc/openrc*/net.example* and save your configuration
# in /etc/conf.d/net (this file :]!).
brctl_br0="setfd 0 sethello 0 stp off"
rc_net_br0_need="net.tap0 net.tap1 net.tap2 net.tap3"
bridge_br0="enp0s25 tap0 tap1 tap2 tap3"
# To add ports to bridge br0
# Finally give the bridge an address - dhcp or a static IP
config_br0=("10.0.0.10 netmask 255.255.0.0 brd 10.0.0.255")
routes_br0=("default via 10.0.0.1")
dns_servers_br0=("10.0.0.1")
config_tap0="null"
tuntap_tap0="tap"
tunctl_tap0="-u risq"
mac_tap0="00:00:00:00:00:01"
config_tap1="null"
tuntap_tap1="tap"
tunctl_tap1="-u risq"
mac_tap1="00:00:00:00:00:02" |
i can now start a virtual machine by
| Code: | | qemu-system-x86_64 -enable-kvm -cpu host -drive file=/virt/v1.img,if=virtio -net nic -net bridge,br=br0 -m 1G -name v1 |
it will get a DHCP adress in my network (10.0.0.23), everythings fie.
question is how i can run other VMs, if i use -net bridge,br=br0 they will get the same 10.0.0.23 adress...
any help appreciated, thx in advance! |
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nativemad
Developer
Joined: 30 Aug 2004
Posts: 918
Location: Switzerland
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| Posted: Tue Jun 02, 2015 6:54 pm Post subject: |
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Hi,
you should use the bridged tap devices in the qemu command and not the bridge device itself! 
HTH, Cheers
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