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Re: [dc] draft-khasnabish-vmmi-problems-00.txt

Donald Eastlake <d3e3e3@gmail.com> Tue, 31 January 2012 19:13 UTC

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From: Donald Eastlake <d3e3e3@gmail.com>
Date: Tue, 31 Jan 2012 14:13:20 -0500
Message-ID: <CAF4+nEEZYsvX3AsLUP8ZrapOeKrqX5U8Lp45dNxsv+TZtW28sA@mail.gmail.com>
To: "Ashish Dalela (adalela)" <adalela@cisco.com>
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Cc: Thomas Narten <narten@us.ibm.com>, Steven Blake <sblake@extremenetworks.com>, dc@ietf.org
Subject: Re: [dc] draft-khasnabish-vmmi-problems-00.txt
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See below

On Thu, Jan 19, 2012 at 8:07 PM, Ashish Dalela (adalela)
<adalela@cisco.com> wrote:
>> - Hypervisor based encapsulations
>> - Network based encapsulations
>
>> I don't see any reason why these need to differ.
>
> The fact is that they do differ. A hypervisor based solution will not run a routing protocol (control plane), or we haven't seen that yet. That means many types of information will be pulled through configuration / mgmt control from a hypervisor controller rather than the network control plane.
>
>> - L2 in L2 encapsulation
>
>> IEEE owns this space.
>
> Then there is TRILL in IETF.

TRILL is not L2 in L2. TRILL as specified defines a new layer that is
above all Layer 2 bridging but below Layer 3 routing. TRILL switches
appear to be end stations to bridges but are as transparent to L3
routers as bridges are.

Thanks,
Donald
=============================
 Donald E. Eastlake 3rd   +1-508-333-2270 (cell)
 155 Beaver Street, Milford, MA 01757 USA
 d3e3e3@gmail.com

>> - L2 in L3 encapsulation
>
>> This is NVO3.  I would prefer to have to support the minimum number of
>> NVO3 encapsulations in HW.
>
> Minimum is not quantified :-) I thought you said you wanted only one.
>
>> - L3 in L3 encapsulation
>
>> There are already plenty to choose from.
>
> We agree.
>
> Thanks, Ashish
>
> -----Original Message-----
> From: Steven Blake [mailto:sblake@extremenetworks.com]
> Sent: Thursday, January 19, 2012 10:25 PM
> To: Ashish Dalela (adalela)
> Cc: Thomas Narten; dc@ietf.org
> Subject: RE: [dc] draft-khasnabish-vmmi-problems-00.txt
>
> On Thu, 2012-01-19 at 08:23 -0800, Ashish Dalela (adalela) wrote:
>
>> >> "one encapsulation, please".
>>
>> How do you propose we reconcile the present scenario:
>>
>> - Hypervisor based encapsulations
>> - Network based encapsulations
>
> I don't see any reason why these need to differ.
>
>> - L2 in L2 encapsulation
>
> IEEE owns this space.
>
>> - L2 in L3 encapsulation
>
> This is NVO3.  I would prefer to have to support the minimum number of
> NVO3 encapsulations in HW.
>
>> - L3 in L3 encapsulation
>
> There are already plenty to choose from.
>
>
> Regards,
>
> /////////////////////////////////////////////
> Steven Blake       sblake@extremenetworks.com
> Extreme Networks              +1 919-884-3211
>
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