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xen-users
RE: [Xen-users] VLAN help
Thank you so much for your help.
I was able to get the link up and working
(I can ping the router on the network from DOM0) but after 30 seconds or so, it
goes away. Even during a continuous ping the network will eventually just
disappear. If I ifup the bridge and the bond, it is great again for a
short while before it goes away. This has me stumped. However, between
what you told me and the Networking part of the Wiki (http://wiki.xensource.com/xenwiki/XenNetworking)
I feel confident that there is an answer to this.
My other concern now is how this will all
play in a resource pool? Will it be automatically propagated as I add
machines to the pool or will I have to reconfigure for each machine? It is not
too bad if I have to do it on each machine; I only have a small handful of
VLANS I need access to. I just need to make sure that I do them all the same so
that Xenmotion will still work.
James
James
Alspach
Systems
Analyst II
Shasta County Office of Education
From: Nick Couchman
[mailto:Nick.Couchman@xxxxxxxxx]
Sent: Wednesday, June 04, 2008
12:26 PM
To: xen-users@xxxxxxxxxxxxxxxxxxx;
James Alspach
Subject: RE: [Xen-users] VLAN help
James,
I
do the setup using the dom0's vlan tools, so in SuSE (which is what I use most
of the time), I have /etc/sysconfig/network/ifcfg-vlan1 and
/etc/sysconfig/network/ifcfg-xenbr1 to set up the vlan and bridge,
respectively. In RH-style, it would be something like
/etc/sysconfig/network-scripts/ifcfg-bond0.1 and I can't remember what the
bridge stuff is like in the RH-style ones.
-Nick
>>> On Wed, Jun 4, 2008 at 1:21 PM, "James
Alspach" <jalspach@xxxxxxxxxxxxx>
wrote:
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/?
Thank you for such a fast reply!
size=2 width="100%" align=center tabindex=-1>
Nick Couchman [mailto:Nick.Couchman@xxxxxxxxx]
Wednesday, June 04, 2008 12:14 PM
xen-users@xxxxxxxxxxxxxxxxxxx;
James Alspach
Re: [Xen-users] VLAN help
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.
>>> 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.
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.
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