On Jul 11, 2012, at 11:05, "Larry Kreeger (kreeger)" <[email protected]> wrote:

> On 7/11/12 10:28 AM, "Luyuan Fang (lufang)" <[email protected]> wrote:

<snipped>

>> 2) If NVE and TES are not in the same physical device, but TES to NVE
>> using L3 protocols only, there is still no need for VDP or VDP-alike
>> protocol.
> 
> I don't agree with that one.  But first, let's clarify that I'm assuming
> that there is an additional component in between the TES and the NVE
> (which I believe is called End Device in the framework doc).  Here is a
> picture to illustrate:
> 
>       Hypervisor            Access Router/Switch
>   +-------------------+       +-----+-------+
>   | +---+   +-------+ |       |     |       |
>   | |TES|---|       | | VLAN  |     |       |
>   | +---+   |Virtual|---------+ NVE |       +--- Underlying
>   | +---+   |Switch | | Trunk |     |       |    Network
>   | |TES|---|       | |       |     |       |
>   | +---+   +-------+ |       |     |       |
>   +-------------------+       +-----+-------+
> 

THANK YOU!

Terminology (e.g., TES) is only useful if it's used consistently and correctly.

> I'm assuming VDP happens between trusted devices, so in this picture the
> hypervisor virtual switch is a trusted End Device.  It would run the
> VDP-like protocol.  In this case, there is still a need to inform the NVE
> of the need to participate in a given L3 VN and possibly to be informed of
> the TES IP addresses within that VN.

Agreed with both parts: virtual switch would run VDP, and the need for it. 

Kireeti

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