Re: [RPRWG] TDM or ATM/FR service emulation over RPR ring
Hi Leon,
I have also a question related to TDM/FR/ATM emulation over RPR.
How do we identify the destination node MAC address in such a case
and set the priority?
Request for your inputs.
Regards,
Murali.S
----- Original Message -----
From: "Leon Bruckman" <leonb@xxxxxxxxxxxxx>
To: "'Yu Ning'" <yuning@xxxxxxxxxxxxxxx>
Cc: <stds-802-17@xxxxxxxx>
Sent: Tuesday, March 05, 2002 2:49 PM
Subject: RE: [RPRWG] TDM or ATM/FR service emulation over RPR ring
>
> Hi Yu,
> RPR Standard defines a MAC and does not deal directly with how to
transport
> the services. It provides Classes of Service that can be used to transport
> different services, but these classes are defined based on their
> characteristics (delay, delay variation,..) and not on the type of
service.
>
> As for the specific way of transporting TDM/FR/ATM over packet networks I
> recommend you to look in the IETF PWE3 work.
>
> And yes, we have considered the stringent timing requirements of TDM over
> RPR (you can see some presentations of simulations results as early as
March
> 2001). From the results, and also theoretical calculations, for high rate
> ring there is no problem to deal with the delay variation using a small
> dejitter buffer at the receiver.
>
> Leon Bruckman
> VP & Chief System Architect
> Corrigent Systems
>
> -----Original Message-----
> From: Yu Ning [mailto:yuning@xxxxxxxxxxxxxxx]
> Sent: Tuesday, March 05, 2002 10:12 AM
> To: stds-802-17@xxxxxxxx
> Subject: [RPRWG] TDM or ATM/FR service emulation over RPR ring
>
>
>
> Hi All,
>
> Apologize if this question been asked before (pls give a pointer to former
> answer then.)
>
> How is the TDM, ATM/FR service emulation provided through RPR ring ?
> Is this emulation based on a protocol translation scenario (protocol field
> mapping), or raw encapsulation scenario (put TDM/ATM/FR frame as RPR
> payload)?
>
> Because I saw some product brochure from vendors, like Luminous,
Riverstone,
> their MAN box has both Ethernet interface and PDH interface, like E1/T1,
and
> all through RPR backhaul (said so). It just puzzled me how to emulate
these
> service through RPR ring.
>
> I've checked RPR whitepaper, and rfc2892, there is no description on
> service emulation issue, only a natural L3 IP into RPR frame illustration.
>
> If TDM via RPR ring, anyone considered the stringent timing requirement
> from TDM ?
>
>
> thanks for any input.
>
>
> Yu Ning
>
> ______________________________________
>
> (Mr.) Yu Ning, Chief Engineer
> ChinaNET (AS4134) Senior Support
> Internet Dep. DCBU, China Telecom
> Beijing, P.R.China +86-10-62072357
> Personal Page-> http://navidog.126.com
> ______________________________________
>
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