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I'm trying to configure a bridge network for VM's. I want the VM to share the physical adapter with the host, and I want both of them to get IP's from the router DHCP server.
I've got everything set-up based on the top answer from this link, except for some changes related to DHCP, as the answer assumes static IP's.
https://askubuntu.com/questions/1412503/setting-up-a-bridge-for-host-and-vm
contents of host-bridge.xml on Host
Contents of 50-cloud-init.yaml on Host
ifconfig -a on Host
(i see bro0 is listed here, this is a leftover from a failed previous attempt that included a typo, I'm not sure how to make it disappear, but as far as i can tell nothing uses this)
networkctl on Host
brctl show on Host
sudo virsh net-list --all on Host
and finally, the code from 'sudo virsh edit <myVMdomainName>' that is related to the network interface, related to the stack exhange answer/guide linked above
and for real finally, the output of ifconfig -a on my VM
Also, networkctl output on VM
Any help available here? I know this is a lot - and I'm definitely on a steep learning curve here.
In short, VM is not getting an IP. previously it was "working" with NAT - but that was just giving the VM internet access. I want full network access.
I've got everything set-up based on the top answer from this link, except for some changes related to DHCP, as the answer assumes static IP's.
https://askubuntu.com/questions/1412503/setting-up-a-bridge-for-host-and-vm
contents of host-bridge.xml on Host
Code:
<network>
<name>host-bridge</name>
<uuid>89ae32dc-af81-4068-935d-f11aeabea5a9</uuid>
<forward mode='bridge'/>
<bridge name='br0'/>
</network>Contents of 50-cloud-init.yaml on Host
Code:
network:
version: 2
ethernets:
enp3s0f0:
dhcp4: false
bridges:
br0:
dhcp4: yes
interfaces: [ enp3s0f0 ]ifconfig -a on Host
Code:
br0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.1.143 netmask 255.255.255.0 broadcast 192.168.1.255
inet6 fdd1:93b8:5f1a:0:d438:1dff:fe31:c77 prefixlen 64 scopeid 0x0<global>
inet6 fe80::d438:1dff:fe31:c77 prefixlen 64 scopeid 0x20<link>
ether d6:38:1d:31:0c:77 txqueuelen 1000 (Ethernet)
RX packets 105054 bytes 16627847 (16.6 MB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 40977 bytes 56926588 (56.9 MB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
bro0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
inet6 fe80::6499:1fff:fe9a:f3de prefixlen 64 scopeid 0x20<link>
ether 66:99:1f:9a:f3:de txqueuelen 1000 (Ethernet)
RX packets 35012 bytes 3942046 (3.9 MB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 27724 bytes 36671479 (36.6 MB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
enp3s0f0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
ether 44:1e:a1:55:7e:a4 txqueuelen 1000 (Ethernet)
RX packets 373442 bytes 205468683 (205.4 MB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 265267 bytes 252462287 (252.4 MB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
enp3s0f1: flags=4098<BROADCAST,MULTICAST> mtu 1500
ether 44:1e:a1:55:7e:a6 txqueuelen 1000 (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
enp4s0f0: flags=4098<BROADCAST,MULTICAST> mtu 1500
ether 44:1e:a1:55:7e:9c txqueuelen 1000 (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
enp4s0f1: flags=4098<BROADCAST,MULTICAST> mtu 1500
ether 44:1e:a1:55:7e:9e txqueuelen 1000 (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
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 1000 (Local Loopback)
RX packets 500 bytes 44445 (44.4 KB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 500 bytes 44445 (44.4 KB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
virbr0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
inet 192.168.122.1 netmask 255.255.255.0 broadcast 192.168.122.255
ether 52:54:00:13:d7:c6 txqueuelen 1000 (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 2 overruns 0 carrier 0 collisions 0
vnet1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet6 fe80::fc54:ff:fe97:8ae5 prefixlen 64 scopeid 0x20<link>
ether fe:54:00:97:8a:e5 txqueuelen 1000 (Ethernet)
RX packets 28927 bytes 2458997 (2.4 MB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 82263 bytes 114661424 (114.6 MB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0(i see bro0 is listed here, this is a leftover from a failed previous attempt that included a typo, I'm not sure how to make it disappear, but as far as i can tell nothing uses this)
networkctl on Host
Code:
IDX LINK TYPE OPERATIONAL SETUP
1 lo loopback carrier unmanaged
2 enp3s0f0 ether enslaved configured
3 enp3s0f1 ether off unmanaged
4 enp4s0f0 ether off unmanaged
5 enp4s0f1 ether off unmanaged
8 vnet1 ether carrier unmanaged
9 bro0 bridge no-carrier unmanaged
10 virbr0 bridge no-carrier unmanaged
11 br0 bridge routable configuredbrctl show on Host
Code:
bridge name bridge id STP enabled interfaces
br0 8000.d6381d310c77 no enp3s0f0
bro0 8000.66991f9af3de no
virbr0 8000.52540013d7c6 yessudo virsh net-list --all on Host
Code:
Name State Autostart Persistent
------------------------------------------------
default active yes yes
host-bridge active yes yesand finally, the code from 'sudo virsh edit <myVMdomainName>' that is related to the network interface, related to the stack exhange answer/guide linked above
Code:
<interface type='bridge'>
<mac address='52:54:00:97:8a:e5'/>
<source bridge='br0'/>
<model type='virtio'/>
<address type='pci' domain='0x0000' bus='0x01' slot='0x00' function='0x0'/>
</interface>and for real finally, the output of ifconfig -a on my VM
Code:
enp1s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet6 fe80::5054:ff:fe97:8ae5 prefixlen 64 scopeid 0x20<link>
ether 52:54:00:97:8a:e5 txqueuelen 1000 (Ethernet)
RX packets 15 bytes 1050 (1.0 KB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 894 bytes 292084 (292.0 KB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
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 1000 (Local Loopback)
RX packets 286448 bytes 20339712 (20.3 MB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 286448 bytes 20339712 (20.3 MB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0Also, networkctl output on VM
Code:
IDX LINK TYPE OPERATIONAL SETUP
1 lo loopback carrier unmanaged
2 enp1s0 ether degraded configuringIn short, VM is not getting an IP. previously it was "working" with NAT - but that was just giving the VM internet access. I want full network access.
Last edited: