[one-users] 802.1q tagging

[John Dewey]

Thank you all for the information.  I was having difficulties figuring out
how to handle vlan tagging.
I realized the "dom0" must have a tagged interface connected to a seperate
bridge (as Rangababu described).

Since OpenNebula allows you to specify the bridge in the vnet definition it
all just works properly (given
the bridge is setup on all of the onehosts).

Our guest OSes have a pool of addresses from many disperse /24s.  Using vlan
tagging, allows us to use the
same IP address anywhere in the datacenter (no need to map which /24 must
come up on a specific "dom0").
Also, useful when migrating VMs as well.

John

On Mon, Dec 20, 2010 at 12:04 AM, Rangababu Chakravarthula <
rbabu at hexagrid.com> wrote:

> I was referring to creating vlan devices with vconfig. So you create
> multiple vlan devices on the host and associate each with separate bridge.
> However the switch that is used to connect multiple hosts should not add its
> own VLAN tag. It must be capable of forwarding VLAN tagged traffic. This is
> only addressing separation of networks and intra-VM communication within the
> Cloud.
>
> I think openvswitch does the same thing and more. Atleast what I gather
> from here. http://openvswitch.org/?page_id=146
>
> In case when you want a VM in the private cloud to be part of your
> organization VLAN then the packet leaving your VM should carry the VLAN tag
> configured in the switch. Obviously all the VM's using that bridge are part
> of one network.
>
>
> On Sun, Dec 19, 2010 at 11:05 AM, Shi Jin <jinzishuai at gmail.com> wrote:
>
>> I am curious about the same thing.
>> Is it possible to setup libvirt to have different VMs on the same phyiscal
>> NIC on the same physical machine to run under different VLAN? My
>> understanding is that VLAN is setup on the switch for each physical port.
>> Thanks.
>>
>> Shi
>>
>>
>> On Sun, Dec 19, 2010 at 5:43 AM, Gnep Zhao <jass.zhao at gmail.com> wrote:
>>
>>>
>>> Hi,
>>>
>>> I don't really understant：
>>>
>>> 1) create VLAN on the host --- I suppose the vlan is configured on the
>>> switch. Do you mean the host-wide vlan?
>>>
>>> 2) link VLAN to an interface on the host
>>>
>>> And  what's the difference between your solution (802.1q)  and
>>> openvswitch's?
>>>
>>> Gnep
>>>
>>>
>>> On Sun, Dec 19, 2010 at 6:31 AM, Rangababu Chakravarthula <
>>> rbabu at hexagrid.com> wrote:
>>>
>>>> John
>>>> Yes you can use 802.1q VLAN tagging to your VM interface.
>>>>
>>>> The following steps will help you do that.
>>>> 1)  create VLAN on the host
>>>> 2)  link VLAN to an interface on the host
>>>> 3) create a bridge on the host
>>>> 4) associate interface to the bridge
>>>> 5) Define the following in VM template
>>>>
>>>> NIC=[
>>>>   BRIDGE=<bridge name given above>,
>>>>   MAC=00:e5:8d:9f:c1:ba
>>>>    ]
>>>>
>>>> Hope this helps.
>>>> Ranga
>>>>
>>>> On Fri, Dec 17, 2010 at 7:45 PM, John Dewey <john at dewey.ws> wrote:
>>>>
>>>>> I was curious if anyone has used 802.1q tagging with their VMs.  It
>>>>> looks as though libvirt supports vlan tagging,
>>>>> but OpenNebula at this time does not generate an appropriate deployment
>>>>> stanza.
>>>>>
>>>>> I was hoping I could use network contextualization as a way to
>>>>> configure the guest's 802.1q tags.
>>>>> I guess I don't understand vlan tagging when "dom0" bridging is in the
>>>>> mix.
>>>>>
>>>>> Does anyone have anymore information on this topic, I would love to
>>>>> talk with you a bit more offline.
>>>>>
>>>>> Thanks -
>>>>> John
>>>>>
>>>>> _______________________________________________
>>>>> Users mailing list
>>>>> Users at lists.opennebula.org
>>>>> http://lists.opennebula.org/listinfo.cgi/users-opennebula.org
>>>>>
>>>>>
>>>>
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>>>>
>>>>
>>>
>>>
>>> --
>>> =================================================
>>>                          *Often wrong, Never in doubt*
>>> =================================================
>>>
>>>
>>> _______________________________________________
>>> Users mailing list
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>>>
>>>
>>
>>
>> --
>> Shi Jin, Ph.D.
>>
>>
>
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