Quick links
| Ubuntu 22.04
Get current network config:
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nmcli con show
nmcli connection show --active
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We musn’t use wireless interface?
I’ve spend a lot of time to find solution, but wireless bridge always doesn’t work.
This approach also doesn’t work:
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# To bridge wifi interface you may use iw tool to enable 4addr likewise:
# iw dev <wifiInterface> set 4addr on
# brctl addif <bridgename> <wifiInterface>
can't add <wifiInterface> to bridge <bridgename>: Operation not supported
# iw dev <wifiInterface> set 4addr on
# brctl addif <bridgename> <wifiInterface>
Now it should work. You can show bridges using:
# brctl show
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Hmm: link
Hmm:link
Create a bridge, named br0, enp1s0 is my eth0:
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sudo nmcli con add ifname br0 type bridge con-name br0
sudo nmcli con add type bridge-slave ifname enp1s0 master br0
nmcli connection show
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Disable STP:
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sudo nmcli con modify br0 bridge.stp no
nmcli con show
nmcli -f bridge con show br0
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Turn on bridge interface:
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sudo nmcli con down "Wired connection 1"
sudo nmcli con up br0
nmcli con show
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Use ip to view settings:
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ip -c a s br0
3: br0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
link/ether 86:af:40:4f:75:20 brd ff:ff:ff:ff:ff:ff
inet 192.168.137.218/24 brd 192.168.137.255 scope global dynamic noprefixroute br0
valid_lft 81402sec preferred_lft 81402sec
inet6 fd81:23c:1c44:1:68c8:5a6f:724f:e9bf/64 scope global temporary dynamic
valid_lft 599807sec preferred_lft 81388sec
inet6 fd81:23c:1c44:1:4385:e183:63b7:c44b/64 scope global dynamic mngtmpaddr noprefixroute
valid_lft 604801sec preferred_lft 86401sec
inet6 fe80::de15:9f63:99e2:5601/64 scope link noprefixroute
valid_lft forever preferred_lft forever
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Use br0 with KVM:
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cat /tmp/br0.xml
<network>
<name>br0</name>
<forward mode="bridge"/>
<bridge name="br0" />
</network>
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Run virsh command as follows:
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virsh net-define /tmp/br0.xml
virsh net-start br0
virsh net-autostart br0
virsh net-list --all
Name State Autostart Persistent
--------------------------------------------
br0 active yes yes
default active yes yes
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Better explanationhere