KVM Install Notes

Tagging on the Guest. Create the following file.

Note

In this example a bridge interface needs to be created on the host first. The network is configured with trunked ports.
```
<network>
  <name>br-enp3s0f0</name>
  <forward mode="bridge"/>
  <bridge name="br-enp3s0f0"/>
</network>
```
Attention

When creating the VM a single network interface is added. Be sure to add the VLAN interfaces to the guest after booting.

Warning

Adding VLAN interfaces to the host will prevent the guest from seeing the VLAN.
Tagging on the Host. Create the following file.

Note

In these examples I have two VLANs, 122 & 132. Both VLAN intefaces need to be created on the host first. The network is configured with trunked ports.
```
<network>
  <name>macvtap-122</name>
  <forward mode="bridge">
    <interface dev="enp3s0f0.122"/>
  </forward>
</network>
```
```
<network>
  <name>macvtap-132</name>
  <forward mode="bridge">
    <interface dev="enp3s0f0.132"/>
  </forward>
</network>
```
Attention

When creating the VM add two network interfaces. Each will be on their respective VLAN.

SRIOV Networks

Note

With qemu v8+ you can use sriov to dynamically creat VF interfaces for the guest.

qemu-img --version

<network>
  <name>sriov-ens6f0</name>
    <forward mode='hostdev' managed='yes'>
      <pf dev='ens6f0'/>
    </forward>
</network>

Run the following commands to create the new network. This procedure is the same regardless of tagging option choosen in previous steps.
```
sudo virsh net-define <name>.xml
sudo virsh net-autostart <name>
sudo virsh net-start <name>
```

Default network (Forward mode = open). Default virtual bridge for non-trunked interfaces.

<network>
  <name>default</name>
  <forward mode='open'/>
  <bridge name='virbr0' stp='on' delay='0'/>
  <mtu size='9000'/>
  <mac address='52:54:00:7b:e0:da'/>
  <domain name='lab.local' localOnly='yes'/>
  <dns>
    <host ip='192.168.122.1'>
      <hostname>gateway</hostname>
    </host>
  </dns>
  <ip address='192.168.122.1' netmask='255.255.255.0'>
    <dhcp>
      <range start='192.168.122.200' end='192.168.122.249'/>
      <host mac='52:54:00:ea:5f:8b' ip='192.168.122.8'/>
      <host mac='52:54:00:1e:58:c8' ip='192.168.122.9'/>
      <host mac='52:54:00:f4:16:20' ip='192.168.122.20'/>
      <host mac='52:54:00:f4:16:21' ip='192.168.122.21'/>
      <host mac='52:54:00:f4:16:22' ip='192.168.122.22'/>
      <host mac='52:54:00:f4:16:23' ip='192.168.122.23'/>
      <host mac='52:54:00:f4:16:24' ip='192.168.122.24'/>
      <host mac='52:54:00:f4:16:25' ip='192.168.122.25'/>
      <host mac='52:54:00:f4:16:26' ip='192.168.122.26'/>
      <host mac='52:54:00:f4:16:27' ip='192.168.122.27'/>
      <host mac='52:54:00:f4:16:28' ip='192.168.122.28'/>
      <host mac='52:54:00:f4:16:29' ip='192.168.122.29'/>
      <host mac='52:54:00:f4:16:30' ip='192.168.122.30'/>
      <host mac='52:54:00:f4:16:31' ip='192.168.122.31'/>
      <host mac='52:54:00:f4:16:32' ip='192.168.122.32'/>
      <host mac='52:54:00:f4:16:33' ip='192.168.122.33'/>
      <host mac='52:54:00:f4:16:34' ip='192.168.122.34'/>
      <host mac='52:54:00:f4:16:35' ip='192.168.122.35'/>
      <host mac='52:54:00:f4:16:36' ip='192.168.122.36'/>
      <host mac='52:54:00:f4:16:37' ip='192.168.122.37'/>
      <host mac='52:54:00:f4:16:38' ip='192.168.122.38'/>
      <host mac='52:54:00:f4:16:39' ip='192.168.122.39'/>
      <host mac='52:54:00:f4:16:40' ip='192.168.122.40'/>
      <host mac='52:54:00:f4:16:41' ip='192.168.122.41'/>
      <host mac='52:54:00:f4:16:42' ip='192.168.122.42'/>
      <host mac='52:54:00:f4:16:43' ip='192.168.122.43'/>
      <host mac='52:54:00:f4:16:44' ip='192.168.122.46'/>
      <host mac='52:54:00:f4:16:45' ip='192.168.122.45'/>
      <host mac='52:54:00:f4:16:46' ip='192.168.122.46'/>
      <host mac='52:54:00:f4:16:47' ip='192.168.122.47'/>
      <host mac='52:54:00:f4:16:48' ip='192.168.122.48'/>
      <host mac='52:54:00:f4:16:49' ip='192.168.122.49'/>
      <host mac='52:54:00:f4:16:50' ip='192.168.122.50'/>
    </dhcp>
  </ip>
</network>