Re: [trill] FW: New Version Notification for draft-tissa-trill-mt-encode-01.txt

Donald Eastlake <d3e3e3@gmail.com> Sun, 19 August 2012 15:14 UTC

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From: Donald Eastlake <d3e3e3@gmail.com>
Date: Sun, 19 Aug 2012 11:14:02 -0400
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To: "Tissa Senevirathne (tsenevir)" <tsenevir@cisco.com>
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Cc: Naveen Nimmu <naveen@broadcom.com>, "trill@ietf.org" <trill@ietf.org>
Subject: Re: [trill] FW: New Version Notification for draft-tissa-trill-mt-encode-01.txt
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Hi Tissa,

On Fri, Jul 13, 2012 at 12:13 AM, Tissa Senevirathne (tsenevir)
<tsenevir@cisco.com> wrote:
> Hi Donald
>
> Please see my comments in-line
>
> -----Original Message-----
> From: trill-bounces@ietf.org [mailto:trill-bounces@ietf.org] On Behalf Of Donald Eastlake
> Sent: Thursday, July 12, 2012 8:26 AM
> To: Naveen Nimmu
> Cc: trill@ietf.org
> Subject: Re: [trill] FW: New Version Notification for draft-tissa-trill-mt-encode-01.txt
>
> A few comments:
>
> ...
>
> I'm not sure why there has to be an MT Capability bit. Wouldn't just not including the MT TLV be a good enough indication if you required even an MT capable RBridge only participating in base topology zero to include the MT TLV?
>
> [Answer] MT capability bit was added to identify the MT capability in the Hello message itself. However, we can discuss the use of the MT TLV for the purpose. I did not quite understand the inclusion of MT TLV in base topology question.

I believe the MT TLV can occur in Hellos as well as in LSP fragment
zero. It is optional in Hellos for Layer 3 IS-IS routers that only
support topology zero. I don't see why we couldn't require it to be
present in TRILL to indicate support of the proposed data plane
topology encoding.

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

> ...
>
> Thanks,
> Donald
> =============================
>  Donald E. Eastlake 3rd   +1-508-333-2270 (cell)
>  155 Beaver Street, Milford, MA 01757 USA  d3e3e3@gmail.com
>
> On Mon, Jun 18, 2012 at 3:12 PM, Naveen Nimmu <naveen@broadcom.com> wrote:
>> A new version of this draft is posted. This version adds  proposed  extensions to support TRILL nickname space from 16bits to 24 bits.
>> Please review and provide feedback.
>> Thanks
>> \naveen
>>
>> -----Original Message-----
>> From: internet-drafts@ietf.org [mailto:internet-drafts@ietf.org]
>> Sent: Monday, June 18, 2012 8:13 AM
>> To: tsenevir@cisco.com
>> Cc: aldrin.ietf@gmail.com; ginsberg@cisco.com; Naveen Nimmu;
>> ayabaner@gmail.com
>> Subject: New Version Notification for
>> draft-tissa-trill-mt-encode-01.txt
>>
>>
>> A new version of I-D, draft-tissa-trill-mt-encode-01.txt
>> has been successfully submitted by Tissa Senevirathne and posted to
>> the IETF repository.
>>
>> Filename:        draft-tissa-trill-mt-encode
>> Revision:        01
>> Title:           Multi Topology Encoding within TRILL data frames
>> Creation date:   2012-06-17
>> WG ID:           Individual Submission
>> Number of pages: 12
>> URL:             http://www.ietf.org/internet-drafts/draft-tissa-trill-mt-encode-01.txt
>> Status:          http://datatracker.ietf.org/doc/draft-tissa-trill-mt-encode
>> Htmlized:        http://tools.ietf.org/html/draft-tissa-trill-mt-encode-01
>> Diff:            http://tools.ietf.org/rfcdiff?url2=draft-tissa-trill-mt-encode-01
>>
>> Abstract:
>>    Two alternate methods of encoding Multi Topology Identifier within
>>    the TRILL data frames are presented. Methods proposed herein do not
>>    require overloading TRILL RBridge nickname to encode Multi Topology
>>    Identifier. A method that expands TRILL nickname space from 16bits
>>    to 24 bits is also presented in this draft.
>>
>>
>>
>>
>> The IETF Secretariat
>>
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