Re: [Xen-users] [XCP] XCP network and VLAN by Open vSwitch

[Wei-Chih Chen <wcchen.tw@xxxxxxxxx>]

Dear Todd, admin, Everyone,

Thank you for replying.
This information is very important. However, it also confuses me.

"The term "vSwitch" means Open vSwitch in vSwitch Controller User Guide" and we can use ovs- commands to control Open vSwitch.

Do these imply vSwitch Controller controls Open vSwitch through ovs- commands?
(In other words, is vSwitch Controller  a frontend to ovs- commands?)
If yes, then vSwitch Controller would confuse XAPI because it does NOT go through XAPI.

How does Citrix provide a commercial controller that may cause these problems? @@

So far, the followings are what I think:

There are two kinds of XCP network:
1. Original Linux network: XenCenter (GUI tool)-> xe command-> XAPI (Thanks for information from Todd) -> Linux network
2. Open vSwitch (default for XCP): vSwitch Controller (commercial GUI tool)-> ovs- command-> Open vSwitch  (prone to problems)

From aspects of stability, scalability and the amount of features provided, which one is recommended?

Perhaps I misunderstand something.
I am grateful to anyone for making these clear. :)

Thank you very much.
Regards,
Wayne


(From admin@xxxxxxxxxxx:)
When somebody says "it would confuse xapi",
they mean you should always go through the XAPI when configuring things on
XenServer or XCP.  If you try to go around the XAPI (using other tools or
by editing configuration files directly), then it is possible to cause a lot of
unpredictable problems to occur.  For example, if you configure network
outside of the XAPI, you may run into weird problems where the networking may
not properly follow a VM when you live migrate a VM from one node to another. 
So as a general rule, you really want to be sure to do everything through the
XAPI (or use a tool that goes through the XAPI).

On Sat, Jun 18, 2011 at 12:57 PM, Todd Deshane <todd.deshane@xxxxxxx> wrote:

On Fri, Jun 17, 2011 at 2:50 AM, Wei-Chih Chen <wcchen.tw@gmail.com> wrote:
> NOX looks helpful. I will try this.
> Is vSwitch Controller designed dedicatedly to Open vSwitch?
> It seems that the term "vSwitch" means Open vSwitch in vSwitch Controller
> User Guide. Is this correct?

Yes, the vSwitch backend for XenServer/XCP is the Open vSwitch


--

Todd Deshane
http://www.linkedin.com/in/deshantm
http://www.xen.org/products/cloudxen.html
http://runningxen.com/

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