Ipv6 on KVM guest
KVM Guest
The default network on Fedora/CentOS/RHEL IPv4 by default. Even you create a new virtual network it still default to use IPv4. In order to switch to IPv6 on a virtual network called "rchan", you need to use the virsh command to make the switch.
Network options in virsh:
net-autostart autostart a network
net-create create a network from an XML file
net-define define (but don't start) a network from an XML file
net-destroy destroy (stop) a network
net-dumpxml network information in XML
net-edit edit XML configuration for a network
net-info network information
net-list list networks
net-name convert a network UUID to network name
net-start start a (previously defined) inactive network
net-undefine undefine an inactive network
net-update update parts of an existing network's configuration
net-uuid convert a network name to network UUID
Method 1
By using the net-destroy and net-edit options:
- list all active virtual network
virsh net-list --all
[root@newlm networks]# virsh net-list --all Name State Autostart Persistent -------------------------------------------------- default active yes yes rchan active yes yes
- Stop (Destroy) the virtual network "rchan"
virsh net-destroy rchan
- Edit the virtual network to support IPv6
virsh net-edit rchan - Add the following line:
<ip family='ipv6' address='2000:1122:3344:1::1' prefix='64'>
Restart libvirtd and the virtual bridge interface on the host should get the IPv6 address assigned. Reboot your virtual guests and they should get an IPv6 ip address.
Method 2
You can also use the "virsh net-dumpxml rchan", edit the xml file with ipv6 support and use the "virsh net-define rchan" command to activate ipv6 support.
