RE: [Xen-users] VLAN help

["James Alspach" <jalspach@xxxxxxxxxxxxx>]

Great!  That sounds like what I was thinking.

I have bond0 setup on the physical NIC which is connected to the trunked switch interface.

So to set up the interfaces in dom0 I just need to create them using iface.vlan?  Is this configured using a Xensource tool or by directly editing the /etc/sysconfig/network-scripts/?

 

Thanks;

James

 

PS Thank you for such a fast reply!

 

 

 

James Alspach

Systems Analyst II
Shasta County Office of Education

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From: Nick Couchman [mailto:Nick.Couchman@xxxxxxxxx]
Sent: Wednesday, June 04, 2008 12:14 PM
To: xen-users@xxxxxxxxxxxxxxxxxxx; James Alspach
Subject: Re: [Xen-users] VLAN help

 

Here's what I do:

1) Set up tagged VLAN interface and bring all VLANs in on single interface or on trunk (bond0).

2) Set up VLAN interfaces in dom0.  In RH-type distributions this will be something like eth0.1, eth0.2, etc., or bond0.1, bond0.2, etc.  In SuSE-type distros, they are vlan1, vlan2, etc.

3) Set up bridges for each of the VLANs.  So, if I have vlan1 and vlan2, I set up xenbr1 and xenbr2 as bridges where xenbr1 has vlan1 as a bridge member and xenbr2 has vlan2 as a bridge member.  Also, if you want dom0 to have an IP address assigned on any of the VLANs, assign it on the bridge for the VLAN and not the VLAN interface itself.

4) Configure my domUs with bridge=xenbr1 for VLAN1, bridge=xenbr2 for VLAN2, etc.

 

I've pretty well settled on this as a standard and it works fairly well - it provides a consistent setup on all of my XEN servers so that moving domUs between them works w/o having to reconfigure.

 

-Nick

>>> On Wed, Jun 4, 2008 at 12:55 PM, "James Alspach" <jalspach@xxxxxxxxxxxxx> wrote:

 

We are in the process of setting up a few Xensource servers whose initial function will be to run Exchange 2007.  As part of this (and for future VM’s) I need to be able to provide access to various VLANS to the various DOM’s.

 

In theory this sounds fairly straight forward: DOM0 gets a PIF for each VLAN.  This PIF connects to a VLAN specific bridge and then, for each DOM that needs one, a VIF is created and connected to the bridge.

 

Does this sound correct?

 

If so, my question is how to specify the VLAN for a PIF.  I can list it but I am not able to set it since it is read only.

 

 

 

How do virtual networks fit into the above and how is a virtual network different from a virtual bridge?

 

 

 

Any help or pointers to information are greatly appreciated.

 

 

 

Thank you for your help;

 

James

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

James Alspach

 

Systems Analyst II

Shasta

County

Office of Education

1644 Magnolia avenue

Redding

, California

 

96003

 

jalspach@xxxxxxxxxxxxx

 

(530) 225-0293

 

 

 

IT Hotline: 225-0279

 

 

hotline@xxxxxxxxxxxxx

 

 

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