Exercise 6-2: Define a NAT Virtual Network Using virsh

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In this exercise, you will use the virsh command to define a persistent NAT virtual network called rhnet_virsh with subnet 192.168.2.0/24, gateway 192.168.2.1, and DHCP range 192.168.2.2 to .254. You will use virbr2 as the bridge name and a range of ports between 1024 and 65535. You will activate this virtual network and set it to autostart at each system reboot.

1. List virtual networks

$ virsh net-list

2. Create a XML with informations about this Virtual Network

<network>

<name>virsh_bridge</name>

<bridge name='virbr0' stp='on' delay='0' />

<forward mode='nat'>

<nat>

<port start='1024' end='65535' />

</nat>

</forward>

<ip address='192.168.0.1' netmask='255.255.255.0'>

<dhcp>

<range start='192.168.0.100' end='192.168.0.150' />

</dhcp>

</ip>

</network>

3. Define this network as persistent:

$ virsh net-define /root/rhnet_virsh.xml

4. Start automaticaly:

$ virsh net-autostart virsh_bridge

5. Start now

$ virsh net-start virsh_bridge

6. Informações sobre rede

virsh net-info virsh_bridge