Subject: [mpls] Fw: FW: [MPLS] Any comments on the draft of MPLS-TP Shared-Ring protection (MSRP) mechanism for ring topology” ?

From: "[email-masked]" <[email-masked]>
Date: Fri, 11 Jul 2014 12:35:09 +0800

Hi all,
I  am the China Mobile PTN ring protection project managers. We have deployed the ring protection in this draft in Guangdong Province, which is the most economically developed province in China. Currently ring protection techneque is used mostly in aggreation and access layers in metro PTN network with 3G/4G and group customer services. 
In the performance test, the switching time of single point failure is less than 30ms, while the multi-point failure is less than 45ms. The test results show that solution in the draft can acheive the expected telecom performance. 
 
B.R.

Wang Minxue
China Mobile Reserach Institute
 
From: weiqiang cheng [mailto:[email-masked]] 
Sent: Friday, July 11, 2014 11:24 AM
To: Loa Andersson
Cc: Dongjie (Jimmy); [email-masked]; [email-masked]
Subject: Re: [mpls] [MPLS] Any comments on the draft of MPLS-TP Shared-Ring protection (MSRP) mechanism for ring topology” ?
 
Hi Loa,
Thank you very much for your information.
Ring typologies is an economical solution for operators' network,and it can provide double physical routes with minimum number of fibers or Microwave links.
 
So lots of operators access and metro networks are constructed by rings. A specific solution for Ring topology is very valuable.
 
Such as China Mobile, more than 85% fiber networks are using ring topology. Till now, more than 600,000 MPLS-TP based Packet transport network nodes deployed, and most of them are constructed with ring typology. From 2013 years, China mobile began to deploy the Ring Protection solutions as the draft described, now more than 5,000 Nodes have already finished upgrading. The result shows that the networks reliability improved and the operation efficiency also are increased.
 
B.R.
Weiqiang Cheng      

2014-07-10 20:30 GMT+08:00 Loa Andersson <[email-masked]>:
Weiqiang Cheng, Authors,

Sections 5.2. and 5.2.6.1 of RFC 5654 discusses protection in specific
topologies in general and in ring topologies. There quite a number of
specific requirements, but I think that a very high-level summary would
be: "In the case it is beneficial in the operational situation to have
a solution for a specific topology and that solution does not create
drawbacks for the general MPLS protection mechanisms, such a solution
may be specified and deployed."

/Loa

On 2014-07-10 06:57, weiqiang cheng wrote:
Hi Jie,
Thanks for your comments.

MPLS-TP based networks are usually constructed with multiple-ring
topology.In some failure scenarios, linear protection such as PSC cannot
cover the multi-failure issue.In addition,for many application scenarios
such as mobile backhaul,a large number of services should be terminated
in one core node.Because the linear protection should be executed end to
end,the core node will take heavy load to handle OAM messages and
Protection switching.

SMP is a very good solution to share the resources and improve the
network reliability. My understanding is that shared ring protection is
a special case of SMP for ring specifically. It is more easy to
implement and able to reduce
the complexity of protection configuration and operation in ring topology.

B.R.
Weiqiang Cheng

2014-07-09 19:10 GMT+08:00 Dongjie (Jimmy) <[email-masked]
<mailto:[email-masked]>>:

    Dear authors, ____

    __ __

    I have one quick comment on this draft: ____

    __ __

    Since we have Linear Protection (PSC) and the work being done on
    Shared Mesh Protection, do we need dedicated protection solution for
    ring topology?____

    __ __

    Best regards,____

    Jie____

    __ __

    *From:*mpls [mailto:[email-masked]
    <mailto:[email-masked]>] *On Behalf Of *weiqiang cheng
    *Sent:* Wednesday, July 09, 2014 6:41 PM
    *To:* [email-masked] <mailto:[email-masked]>
    *Cc:* [email-masked]
    <mailto:[email-masked]>
    *Subject:* [mpls] [MPLS] Any comments on the draft of MPLS-TP
    Shared-Ring protection (MSRP) mechanism for ring topology” ?____

    __ __

    Hi There,____

    We uploaded the new version draft “MPLS-TP Shared-Ring protection (MSRP) mechanism for ring topology”____

    https://datatracker.ietf.org/doc/draft-cheng-mpls-tp-shared-ring-protection/____

    We authors would like to see comments on this draft. Please help to review it and It would be highly appreciated to send your comments on the mailing list.____

      ____

    Thanks,____

    Weiqiang Cheng____

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Loa Andersson                        email: [email-masked]
Senior MPLS Expert                          [email-masked]
Huawei Technologies (consultant)     phone: +46 739 81 21 64

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