Re: [Xen-users] Need help with networking in DomU's

[Eric Peterson <srcfoo@xxxxxxxxx>]

How did you install Xen?

If you used the install script for FC4 off the xensource website, then
you may want to think about grabbing the source and compiling it
yourself.  I tried this first and after a lot of stability
problems and network issues with my domU domains I gave up and compiled
Xen myself.

I'm now running Xen3 compiled from the testing source code and everything is working very well right out of the box.

-Eric

On 1/16/06, datto@xxxxxxxxxxx <datto@xxxxxxxxxxx> wrote:

Additional info:
ifconfig inside the DomU comes up looking like this below initially after DomU startup:

eth0      Link encap:Ethernet  HWaddr 00:16:3E:6E:57:3E
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

If I give it an ifconfig eth0 10.1.1.215 netmask 255.255.255.0 followed by an ifconfig eth0 up it'll take the information and a new ifconfig afterward will show the new IP and netmask but it still doesn't get me out through the bridge and to the network and the Internet.

Any help appreciated.

Datto

---- datto@xxxxxxxxxxx wrote:
> Fedora Core 4 Dom0 and CenOS 4.1 DomU as outlined similarly at Mark Foster's wiki which doesn't seem to be up at the moment.
>
> uname -a on Dom0
> Linux w2knt412 2.6.12.6-xen3_2.1_fc4 #1 SMP Sun Dec 4 11:19:39 PST 2005 i686 i686 i386 GNU/Linux
>
> Dom0 comes up and is on the network and I can VNC into Dom0 from other computers on the network just fine. However, my DomU's startup and seem to be useable from the DomU console but I can't get their networking to go out to the world. What changes do I need to make to which config files to get my DomU's to go out to the network and to the Internet? Thanks.
>
> Datto
>
> Dom0 ifconfig results
> eth0      Link encap:Ethernet  HWaddr 00:50:DA:5D:7E:E0
>           inet addr:10.1.1.152  Bcast:10.1.1.255  Mask:255.255.255.0
>           inet6 addr: fe80::250:daff:fe5d:7ee0/64 Scope:Link
>           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>           RX packets:242514 errors:0 dropped:0 overruns:0 frame:0
>           TX packets:212056 errors:0 dropped:0 overruns:0 carrier:0
>           collisions:0 txqueuelen:1000
>           RX bytes:20021338 (19.0 MiB)  TX bytes:55288081 (52.7 MiB)
>           Interrupt:5 Base address:0xd800
>
> lo        Link encap:Local Loopback
>           inet addr:127.0.0.1   Mask:255.0.0.0
>           inet6 addr: ::1/128 Scope:Host
>           UP LOOPBACK RUNNING  MTU:16436  Metric:1
>           RX packets:86 errors:0 dropped:0 overruns:0 frame:0
>           TX packets:86 errors:0 dropped:0 overruns:0 carrier:0
>           collisions:0 txqueuelen:0
>           RX bytes:12077 (11.7 KiB)  TX bytes:12077 (11.7 KiB)
>
> xenbr0    Link encap:Ethernet  HWaddr 00:00:00:00:00:00
>           inet6 addr: fe80::200:ff:fe00:0/64 Scope:Link
>           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>           RX packets:9 errors:0 dropped:0 overruns:0 frame:0
>           TX packets:5 errors:0 dropped:0 overruns:0 carrier:0
>           collisions:0 txqueuelen:0
>           RX bytes:252 (252.0 b)  TX bytes:378 (378.0 b)
>
> DomU config file
> kernel = "/boot/vmlinuz-2.6.12.6-xen3_2.1_fc4domU"
> memory = 256
> name = "cos41-03"
> nics = 1
> extra="selinux=0"
> vif=['mac=00:29:5E:18:98:FC, bridge=xenbr0']
> ip="10.1.1.215"
> netmask=" 255.255.255.0"
> gateway="10.1.1.15"
> # dhcp = "dhcp"
> hostname = "412cos4103"
> disk = [ 'file:/opt/xen/domains/vm04/diskimage,sdb7,w','file:/opt/xen/domains/vm04/swapimage,sdb8,w' ]
> root = "/dev/sdb7 ro"
>
> DomU /etc/sysconfig/network
> NETWORKING=yes
> HOSTNAME=412cos4103
>
>
> DomU /etc/sysconfig/network-scripts/ifcfg-eth0
> DEVICE=eth0
> >> BOOTPROTO=static
> IPADDR=10.1.1.215
> NETMASK=255.255.255.0
> GATEWAY=10.1.1.15
>
>
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> Xen-users@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-users

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