Re: [Xen-users] Xen 3.1 networking questions

[Florian Engelmann <mailinglists@xxxxxxxx>]

Ok at the moment I use NAT and i can connect to the internet, but I 
always have to change the router. Xen starts a new vifx.0 interface 
which is my domUs router. The IP changes every time. How to fix that???
here are my configs:
xend-config.sxp (dhcp does not work anyway):
(network-script 'network-nat dhcp=yes')
(vif-script vif-nat)

domU.cfg:
vif  = [ 'ip=10.0.0.100' ]
ip = '10.0.0.100'
netmask = '255.0.0.0'
gateway = '10.0.0.1'

/etc/network/interfaces
auto eth0
#iface eth0 inet dhcp
iface eth0 inet static
address 10.0.0.100
#gateway 10.0.0.254
netmask 255.0.0.0


the gateway is then set by xen to 10.0.0.1 but i have to change it with:
route del default gw 10.0.0.1
and
route add default gw 10.0.x.xxx

while 10.0.x.xxx is the ip of dom0s vifx.0

strange....



Florian Engelmann schrieb:
> I just found this guide:
> http://de.xen-forum.net/viewtopic.php?t=479&highlight=1und1
>
> But it is not working for me. I searched now 2 days but there is no 
> real documentation of networking in xen 3.1 out there. I would like to 
> enable NAT networking and dhcp on the privates LAN side. But I don't 
> know how to setup xen-NAT at all and how to enable xen-dhcp. Isn't 
> there any documentation? Is xen open source still in development or 
> stopped it after citrix bought xensource?
> Florian Engelmann schrieb:
> > Hi,
> > after hours of testing my last hope is the mailinglist. I have got a 
> > root server (www.1und1.com) and I just installed debian etch amd64 on 
> > it. I maanged to compile xen 3.1 from source and also my 1st HVM 
> > virtual guest is running fine (Windows 2003). But 1und1 uses a 
> > absolut strange network setup I have never seen before and I do not 
> > understand why it is working at all!?!
> > These are the settings the root Sever is getting with DHCP (and they 
> > are working...):
> > ifconfig:
> > eth0      Link encap:Ethernet  HWaddr 00:19:99:0D:CD:05
> >          inet addr:87.106.189.xxx  Bcast:87.106.189.203  
> > Mask:255.255.255.255
> >          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
> >          RX packets:15579 errors:0 dropped:0 overruns:0 frame:0
> >          TX packets:15257 errors:0 dropped:0 overruns:0 carrier:0
> >          collisions:0 txqueuelen:1000
> >          RX bytes:1026640 (1002.5 KiB)  TX bytes:5709824 (5.4 MiB)
> >          Interrupt:16 Base address:0x6000
> >
> > route -n:
> > Kernel IP routing table
> > Destination     Gateway         Genmask         Flags Metric Ref    
> > Use Iface
> > 10.255.255.1    0.0.0.0         255.255.255.255 UH    0      0        
> > 0 eth0
> > 10.0.0.0        0.0.0.0         255.0.0.0       U     0      0        
> > 0 eth0
> > 0.0.0.0         10.255.255.1    0.0.0.0         UG    0      0        
> > 0 eth0
> > the route is also set with dhcp but after updating from sarge to etch 
> > i had to use a trick to set the route because dhcp3 did no more use 
> > the modified (by 1und1) dhcp script.
> > So this is my /etc/network/interfaces:
> > auto lo eth0
> > iface lo inet loopback
> >
> > iface eth0 inet dhcp
> >       up ip route add 10.255.255.1/32 dev eth0
> >       up ip route add default via 10.255.255.1
> >
> > auto eth0:0
> > iface eth0:0 inet static
> >       address 87.106.189.xxx
> >       netmask 255.255.255.255
> >       broadcast 87.106.189.xxx
> >
> > # xxx = always the same number (yes ip and broadcast are equal...)
> >
> > I am abolute no network specialist but I never thought a netmask of 
> > 255.255.255.255 is valid and a client can communicate without a 
> > reachable gateway... but it works...
> > I installed my 1st HVM guest and tried to setup networking. Bridging 
> > does not work because windows does not allow those strange network 
> > settings, so I think NAT would be the solution, wouldn't it? But I 
> > did not find any documentation about how to setup NAT with Xen 3.1.
> > What IP do I have to setup at my dom0?
> > Can I use eth0:x to set it up?
> > Do I have to add any IP settings to my guest config:
> > vif = [ 'type=ioemu, bridge=xenbr0' ] ?
> > Should I use DHCP on the private LAN or static IPs?
> > Can I use a 192.168.x.x network or do I have to use 10.x.x.x (I red 
> > about it)?
> > Do you have any good links about NAT and Xen 3.1?
> >
> > Many thanks for your help!
> > Greetings Florian
> >
> > _______________________________________________
> > Xen-users mailing list
> > Xen-users@xxxxxxxxxxxxxxxxxxx
> > http://lists.xensource.com/xen-users
>
> _______________________________________________
> Xen-users mailing list
> Xen-users@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-users

_______________________________________________
Xen-users mailing list
Xen-users@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-users