Re: [Xen-users] Network-bridge with VLAN

[Gael <gael@xxxxxxxxxx>]

Thanks a lot for you help, I will try this for our new batch of servers as we did not manage to have VLAN on network bridges we finally decided to manage the VLAN on the switch directly without using trunk ports... 
But for our next bunch of servers we will most probably implement bonding + VLAN on the xen hosts.

After reading your script, it seems to me that I did the same but it did not work. I basically create the VLAN at startup then the xen network scripts add the VLAN interface to the bridge...

Well thanks anyway!

Gael


On 12/11/08 12:49, "Alain Barthe" <ab266061@xxxxxxxxx> wrote:

> 2008/11/6 Gael Reignier <gael@xxxxxxxxxx>
> > Any help will be much appreciate as this issue starts to drive me crazy
> > and I do not know where to start looking... so if you spot any problem
> > or that I should do something else, just let me know :-) 
>
> Before you get crazy, try this script, I spent several weeks to get it working. 
> The first part dynamically create the VLAN IF (eth0.x) and the associated bridge (xenbrx). The second one creates config files to make it up at the next reboot.
>
> This is the script (sorry for french comments):
>
> --->8---
> #!/bin/bash
> # A. Barthe -- jeu nov 22 14:14:18 CET 2007
> # Script de fabrication dynamique d'un VLAN pour un dom0 xen
> # Parametres: <vlan tag> [device] (device par defaut: eth0)
> #
>
> #DEBUG=echo
>
> script=$(basename $0)
> USAGE="Usage: $script <vlan tag> [device] (device par defaut: eth0)"
>
> if [ $# -ne 1 -a $# -ne 2 ]; then
>     echo $USAGE >&2
>     exit 1
> fi
>
> #--------------------------------------------------------------------
> # FABRICATION DYNAMIQUE DU VLAN ET DU BRIDGE ASSOCIE
>
> vtag=$1
> dev=${2:-eth0}
>
> ifconfig | grep -q p$dev || {
>     echo "p$dev: interface non trouvee" >&2 
>     exit 1
> }
>
> # Creation du VLAN sur pethx
> $DEBUG modprobe 8021q
> $DEBUG vconfig add p$dev $vtag || {
>     echo "Echec a la creation du VLAN" >&2 
>     exit 1
> }
>
> # Renommage de pethx.y en ethx.y
> $DEBUG ip link set p$dev.$vtag name $dev.$vtag
>
> # Recuperation de la MAC de $dev
> mac=$(ifconfig $dev | head -1 | awk '{print $NF}')
>
> # Affectation de la MAC a l'interface just created
> ip link set $dev.$vtag address $mac
>
> # Configuration du VLAN
> $DEBUG ip link set $dev.$vtag promisc on
> $DEBUG ip link set $dev.$vtag multicast on
> $DEBUG ip link set $dev.$vtag arp on
>
> # Creation du bridge et ajout du VLAN dessus
> $DEBUG brctl addbr xenbr$vtag
> $DEBUG brctl addif xenbr$vtag $dev.$vtag
>
> # Demarrage du VLAN et du bridge
> $DEBUG ifconfig $dev.$vtag up
> $DEBUG ifconfig xenbr$vtag up
>
> #--------------------------------------------------------------------
> # FABRICATION DES FICHIERS DE DEMARRAGE POUR QUE CA MARCHE AU REBOOT
>
> root="/etc/sysconfig/network-scripts"
> #root="toto"
> baseif="ifcfg-"
>
> iffile="$root/$baseif$dev"
> test -f $iffile || {
>     echo "$iffile: fichier non trouve" >&2
>     exit 1
> }
>
> # Rajout du flag VLAN dans le fichier de demarrage de l'interface
> grep -q "VLAN=yes" $iffile || echo "VLAN=yes" >> $iffile
>
> # Fabrication du fichier de demarrage du vlan
> vlanfile="$iffile.$vtag"
> cat > $vlanfile <<EOF
> DEVICE=$dev.$vtag
> BOOTPROTO=none
> >
> TYPE=Ethernet
> VLAN=yes
> BRIDGE=xenbr$vtag
> EOF
>
> # Fabrication du fichier de demarrage du bridge associe
> brfile="$root/${baseif}xenbr$vtag"
> cat > $brfile <<EOF
> DEVICE=xenbr$vtag
> BOOTPROTO=none
> >
> TYPE=Bridge
> EOF
>
> # Et voila...
> echo "Le VLAN $dev.$vtag et le bridge xenbr$vtag ont bien ete crees."
> --->8---
>
> Hope this helps.
>
> Alain.
>  
> > So thanks a million in advance for any of your help!
> >
> > Cheers
> > Gael
> >
> >
> >
> >
> >
> >
> >
> > _______________________________________________
> > Xen-users mailing list
> > Xen-users@xxxxxxxxxxxxxxxxxxx
> > http://lists.xensource.com/xen-users




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