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Re: [Xen-users] VLAN configuration

To: Marc Patino Gómez <mpatino@xxxxxxxxxxxx>, xen-users@xxxxxxxxxxxxxxxxxxx
Subject: Re: [Xen-users] VLAN configuration
From: Laurent Jouannic <laurent.jouannic@xxxxxxx>
Date: Wed, 04 Jul 2007 15:29:10 +0200
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Hi Marc, and thanks a lot.

It's better now, but still strange:

/etc/xen/scripts/vlan-network-bridge start
start
Set name-type for VLAN subsystem. Should be visible in /proc/net/vlan/config
Added VLAN with VID == 2 to IF -:eth0:-
Added VLAN with VID == 2 to IF -:eth1:-
ifdown: interface eth0 not configured
SIOCSIFNAME: Device or resource busy <============= STRANGE ifdown: interface eth0.2 not configured <============= STRANGE
Nothing to flush.
Nothing to flush.
Waiting for peth0.2 to negotiate link.Ignoring unknown interface eth0.2=eth0.2. <============= STRANGE
Nothing to flush.
Waiting for peth1 to negotiate link.
Link veth1 is missing. <============= STRANGE
This may be because you have reached the limit of the number of interfaces
that the loopback driver supports.  If the loopback driver is a module, you
may raise this limit by passing it as a parameter (nloopbacks=<N>); if the
driver is compiled statically into the kernel, then you may set the parameter
using loopback.nloopbacks=<N> on the domain 0 kernel command line.

Apparently, il seems to deal with: loopback
But I put:  loop max_loop=64 in /etc/modules

Does I have to include loopback.nloopbacks in my grub.conf
like:

title Xen 3.0.3-1-i386-pae / Debian GNU/Linux, kernel 2.6.18-4-xen-686
root            (hd0,0)
kernel /xen-3.0.3-1-i386-pae.gz dom0_mem=200000 loopback.nloopbacks=64
module          /vmlinuz-2.6.18-4-xen-686 root=/dev/md2 ro console=tty0
module          /initrd.img-2.6.18-4-xen-686
savedefault

I don't know howmuch nloopback I have to put,
is 64 ok ?

It's dangerous to deal with kernel stuff, the machine is not in the same area....

Thanks. Laurent.





Marc Patino Gómez a écrit :
Hi Laurent,

has you load the vlan kernel module?

# lsmod | grep 8021q

if not :

# modprobe 8021q

I hope it will help you.

Marc

Laurent Jouannic wrote:
Hi to the ML.

I'm new to VLAN configuration, and combining it to XEN is a bit difficult.

I want to use VLAN because it's possible to "arping" from a domU to an other, and VLAN looks like; the only solution to prevent that. May be I'm wrong if someone got a solution, I may be interrested. I've also tryed ebtables, but nothing to prevent arp question: who-as IP¨.

The configuration I need is:
 -------------
 |   domU      |
-| -[ dom1 ]-  |-
| -[ dom2 ]-  |
 -------------

I want dom1 and dom2 to use eth0 and eth1, with vlan interface.

I've tryed http://lists.xensource.com/archives/html/xen-users/2007-03/msg00988.html configuration, but I have the following error:

WARNING: Could not open /proc/net/vlan/config. Maybe you need to load the 8021q module, or maybe you are not using PROCFS?? Set name-type for VLAN subsystem. Should be visible in /proc/net/vlan/config
ERROR: trying to add VLAN #2 to IF -:eth0:-  error: Invalid argument
ERROR: trying to add VLAN #3 to IF -:eth0:-  error: Invalid argument

The machine run on Debian Etch and the vlan package is intalled.

If you have some ideas, I'm stuck!!!
Thanks.


Laurent.

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