[fedora-virt] how to change dhcp range for default virbr0
Laine Stump
laine at redhat.com
Mon Mar 1 20:09:25 UTC 2010
On 03/01/2010 02:35 PM, Gianluca Cecchi wrote:
> Hello,
> I want to make the default network assign ips in the range of
> 192.168.122.101 - 192.168.122.254 instead than default values.
>
> From virt-manager it seems that the setting is not editable.
I'm not sure why all the info is displayed in a nice dialog tab in
virt-manager, but the fields are all read-only - maybe the backend
isn't implemented yet.
However, you can easily edit it from the shell - "virsh net-edit
default" will bring up the XML config in your editor of choice (whatever
"EDITOR" is set to in the environment, or vi by default). Just change
the range, exit the editor, then run:
virsh net-destroy default
virsh net-start default
(until you restart the network, the dnsmasq process will still have the
old config). Also, I notice that virt-manager will retain the
out-of-date config info (even though the new config has taken effect)
until you disconnect and reconnect.
> Changing the file /etc/libvirt/qemu/networks/default.xml and
> restarting libvirtd and/or the system it seems the file actually is
> not parsed as I see:
You should not directly edit these files. Always edit via virsh
commands, or any other application that uses the libvirt API.
> [root at tekkaman ~]# ps -ef|grep dns
> nobody 1464 1 0 18:59 ? 00:00:00 /usr/sbin/dnsmasq
> --strict-order --bind-interfaces
> --pid-file=/var/run/libvirt/network/default.pid --conf-file=
> --listen-address 192.168.122.1 --except-interface lo --dhcp-range
> 192.168.122.2,192.168.122.254 --dhcp-lease-max=253
>
> and the same range in virt-manager networks window....
>
> Is there a method to change behaviour so that in default virbr0 I have
> s subset of fixed ip and a subset of dhcp assigned ones?
>
> Using F12 + rawvirt repository
> libvirt-0.7.6-1.fc12.x86_64
>
> Thanks,
> Gianluca
>
>
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