Re: [trill] Any comments on Coordinated Multicast Trees (CMT) for TRILL - draft-ietf-trill-cmt-00

Mingui,
This solution cannot be evaluated or deployed without knowing it's approach towards link failures. 
IMO, the draft is incomplete without it, and a solution should not be deferred to another draft.
--
Sunny

On Aug 15, 2012, at 5:54 PM, "Mingui Zhang" <zhangmingui@huawei.com> wrote:

I had read this draft.

IMO, the updated version focus on the specific RPFC issue in active-active multi-homing. The failure recovery from links fails  can be regarded as another common issue of active-active multi-homing, which may  be handled in a separate ID.

Thanks,
Mingui

From: trill-bounces@ietf.org [mailto:trill-bounces@ietf.org] On Behalf Of Sunny Rajagopalan
Sent: Thursday, August 16, 2012 6:28 AM
To: Erik Nordmark
Cc: trill-bounces@ietf.org; trill@ietf.org
Subject: Re: [trill] Any comments on Coordinated Multicast Trees (CMT) for TRILL - draft-ietf-trill-cmt-00

I had sent out comments on this a while back, and none of them have been addressed. 
To summarize the issues: 
1) What happens when one of the CE-rbridge links fails? The draft doesn't talk about this scenario. I listed the possible solutions in my earlier email; are the authors planning to adopt one of them, or do they have another fix in mind? 

2) The solution doesn't work if the CE switches are interconnected, but this is but this is not documented in the draft. What happens if they get interconnected accidentally? What is the process for recovery? This needs to be discussed in the draft. 
More details here: 
http://www.ietf.org/mail-archive/web/trill/current/msg04984.html 

From:        Erik Nordmark <nordmark@acm.org> 
To:        "trill@ietf.org" <trill@ietf.org> 
Date:        08/15/2012 03:14 PM 
Subject:        [trill] Any comments on Coordinated Multicast Trees (CMT) for TRILL        - draft-ietf-trill-cmt-00 
Sent by:        trill-bounces@ietf.org

We are trying to understand if this document is getting close to WG last 
call, but we don't know how many have read the document.

If you have reviewed the document, please let us know.
If not, this might be a good time to review the document and provide 
comments.

Thanks,
   Erik and Donald
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