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Re: [trill] 答复: Charter Revision Active-Active Item

Donald Eastlake <d3e3e3@gmail.com> Tue, 07 May 2013 03:56 UTC

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From: Donald Eastlake <d3e3e3@gmail.com>
Date: Mon, 06 May 2013 23:56:01 -0400
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To: Haoweiguo <haoweiguo@huawei.com>
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Subject: Re: [trill] 答复: Charter Revision Active-Active Item
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Hi,

On Thu, May 2, 2013 at 11:06 PM, Haoweiguo <haoweiguo@huawei.com> wrote:
> Hi Donald,
> Active-Active normally means dual-home, in trill multi-homing scenario, CE may be accessed to more than two edge RBs. so the terminology of Active-Active had better be modified to All-Active to support more general multi-access scenario.

I'm not sure....  I agree that "Active-Active" is a bit misleading and
when I draw diagrams I try to always include three TRILL switches at
the edge so it is clear that it is not limited to two. "All-Active"
sounds more accurate but people are not used to it. They are used to
saying "Active-Active" and I think they usually understand that it can
be more than two...

On Thu, May 2, 2013 at 10:53 PM, Haoweiguo <haoweiguo@huawei.com> wrote:
> Hi Donald,
> For Active-Active access scenario, the following requirements also should be considered:
>
> Support fast node and link failure detection.

Yes.

> Support LACP configuration and state synchronization.

I think LACP or the like may be a part of one solution for the case
where the TRILL switches cannot see each others Hellos, so I do not
think the problem statement should mention it. There may also be a
solution where they can see each others Hellos...

> Support MAC-Sharing to avoid always broadcasting

Minimizing unknown destination MAC flooding seems like a good goal.

> The detail of the above requirements have been described in the draft <draft-hao-trill-rb-syn-00>.
> thanks
> weiguo

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

> thanks
> weiguo
> ________________________________________
> 发件人: Donald Eastlake [d3e3e3@gmail.com]
> 发送时间: 2013年5月3日 10:05
> 到: trill@ietf.org
> 主题: [trill] Charter Revision Active-Active Item
>
> Hi,
>
> Item "(2) Active-Active connection at the edge of a TRILL campus.
> (draft-ietf-trill-cmt, draft-hu-trill-pseudonode-nickname)"
>
> There appeared to be agreement that work should be done in this space
> but a better problem statement / scope was requested.
>
> Comments?
>
> Thanks,
> Donald
> =============================
>  Donald E. Eastlake 3rd   +1-508-333-2270 (cell)
>  155 Beaver Street, Milford, MA 01757 USA
>  d3e3e3@gmail.com

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