Re: [Xen-users] How to assign fixed ip-addres to vifN.0?

[Hans de Hartog <dehartog@xxxxxxxxxx>]

Solved this problem myself. It was my fault, sorry.
I gave up on trying to prevent dhcp from starting.
I thought that dom0 (when starting domU), first had to bring up vif1.0
I tried for days to make that happen but it didn't. I was desperate.
And as it turns out, dom0 does not have to bring up vif1.0
Dom0 ONLY needs to connect vif1.0 to the bridge (which it always did)
and let domU start his network the way it wants and everything is OK.
So, no need for links in /etc/init.d from net.lo to net.vif1.0 thru
net.vif7.0 ...

Pfffffffffff,
Hans.

Hans de Hartog wrote:
> Hello,
> I'm trying for days to get the netwerk up in domU.
> Dom0 is linux-2.6.16.28-xen (xen-sources from Gentoo).
> DomU is the previous version (2.6.16.26-r1).
> 
> In dom0: brctl show:
> bridge name     bridge id               STP enabled     interfaces
> xenbr0          8000.feffffffffff       no              vif0.0
>                                                         peth0
> Dom0 got his ip-adress (10.0.0.2) on eth0 via dhcp from another
> machine.
> 
> DomU config:
> kernel = "/boot/vmlinuz-2.6.16.26-r1-xenU"
> memory = 64
> name = "Cardhu"
> vif = [ 'mac=00:16:3e:00:00:03, ip=10.0.0.3' ]
> dhcp = "off"
> netmask = "255.255.255.0"
> gateway = "10.0.0.2"
> hostname = "CARDHU"
> disk = [ 'phy:hda5,hda5,w' ]
> root = "/dev/hda5 ro"
> 
> Under gentoo, dom0 is looking for network startup scripts
> in /etc/init.d/net.<interface name> so I made links for
> net.vif1.0, net.vif2.0 and so on.
> Then, if there is no configuration for vifN.0, gentoo assumes
> DHCP and I do not want DHCP (the broadcasts seem to disapear).
> Therefore. I included
> config_vif1.0=( "10.0.0.51/24" )
> config_vif2.0=( "10.0.0.52/24" )
> and so on, in /etc/conf.d/net. (I don't want those addresses
> but it is just to prevent dom0 from running DCHP to bring up
> vifN.0).
> 
> Nevertheless, DHCP is still used to bring vifN.0 up but never
> succeeds. From /var/log/messages:
> 
> Sep 15 16:06:50 OBAN logger: /etc/xen/scripts/vif-bridge: online
> XENBUS_PATH=backend/vif/5/0
> Sep 15 16:06:51 OBAN device vif5.0 entered promiscuous mode
> Sep 15 16:06:51 OBAN xenbr0: port 3(vif5.0) entering learning state
> Sep 15 16:06:51 OBAN xenbr0: topology change detected, propagating
> Sep 15 16:06:51 OBAN xenbr0: port 3(vif5.0) entering forwarding state
> Sep 15 16:06:51 OBAN logger: /etc/xen/scripts/vif-bridge: Successful
> vif-bridge online for vif5.0, bridge xenbr0.
> Sep 15 16:06:51 OBAN logger: /etc/xen/scripts/vif-bridge: Writing
> backend/vif/5/0/hotplug-status connected to xenstore.
> Sep 15 16:06:51 OBAN logger: /etc/xen/scripts/block: add
> XENBUS_PATH=backend/vbd/5/773
> Sep 15 16:06:53 OBAN logger: /etc/xen/scripts/block: Writing
> backend/vbd/5/773/physical-device 3:5 to xenstore.
> Sep 15 16:06:53 OBAN logger: /etc/xen/scripts/block: Writing
> backend/vbd/5/773/hotplug-status connected to xenstore.
> Sep 15 16:06:55 OBAN rc-scripts: Configuration not set for vif5.0 -
> assuming DHCP
> Sep 15 16:07:00 OBAN dhclient: DHCPDISCOVER on vif5.0 to 255.255.255.255
> port 67 interval 2
> Sep 15 16:07:02 OBAN dhclient: DHCPDISCOVER on vif5.0 to 255.255.255.255
> port 67 interval 5
> Sep 15 16:07:07 OBAN dhclient: DHCPDISCOVER on vif5.0 to 255.255.255.255
> port 67 interval 5
> 
> So, I have never seen a domU with a network interface other than lo :-)
> Why the #%#@&^* is xend not take the vif [ 'ip=.... ] stuff from the
> config file for domU? Can somebody please help me?
> Other things I tried but did not bring me any closer then this to domU
> networking:
>  - The route scripts instead of the bridge-scripts.
>  - Explicitly running dhcpd in dom0 on peth0 (doesn't
>    work because there is no ip-address)
> 
> Thanks for reading this far,
> Hans.
> 
> _______________________________________________
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> Xen-users@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-users
> 


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