Re: [Xen-users] switch to static ip

["Henning Sprang" <henning_sprang@xxxxxx>]

On 4/20/07, Marco Mandl <marco.mandl@xxxxxx> wrote:
> Hello,
>
> I migrated a sarge installation into a domU. I did this using dhcp. That
> worked fine.
Dhcp makes migrating domU's from real hardware to a Xen domU?
Interesting, I thought it's just delivering IP configurations :)


> But now I want to switch to static ip address.
>
> In the corresponding xmdomain.cfg I change:
> #dhcp = 'dhcp'
> #vif  = [ '' ]
> dhcp = "off"
> ip = "192.168.17.16"
> netmask = "255.255.255.0"
> #broadcast = "192.168.17.255"
> #network = "192.168.17.0"
> gateway = "192.168.17.1"
The "ip", "gateway" and "netmask" settings only affect the Xen
networking scripts, mainly in routed, but probably also in nated mode
(never used natted mode myself). They do not actually change the
configuration of your DomU's interfaces.

> I even tried to changed the /etc/network/interfaces of the domU:
> auto lo
> iface lo inet loopback
> auto eth0
> iface eth0 inet static
> name Ethernet LAN card
> address 192.168.17.16
> netmask 255.255.255.0
> broadcast 192.168.17.255
> network 192.168.17.0
> gateway 192.168.17.1
That is the way to go - configure a static IP in the domU itself.

> But there is no eth0 in domU:
> $ sudo ifconfig -s
> Iface   MTU Met   RX-OK RX-ERR RX-DRP RX-OVR   TX-OK TX-ERR TX-DRP TX-OVR Flg
> lo    16436 0      1461      0      0      0    1461      0      0      0 LRU
>
> Network of dom0 seems to be ok:
> What am I doing wrong?
Apart from the things said, look at the "vif" config line - why did
you comment it out?
If you tell Xen that your VM shouldn't have a network interface, it
will not have one.

Read the Xen manual about configuring network cards, and look at the
example configs to correct this  (hint: try just  commenting the vif
line back in).

Henning

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