Re: [mpls-tp] Linear Ether APS-g8031

[Huub van Helvoort <[e-mail]>]

Hello Saravanan,

You replied:

> Thanks for this clarification.
> Can I consider flowing two drafts are different option for implementing APS in MPL-TP?
>
> 1) Linear Protection Switching in MPLS-TP draft-zulr-mpls-tp-linear-protection-switching-01.txt
>
> 2) MPLS-TP Linear Protection  draft-ietf-mpls-tp-linear-protection-03.txt

I would like to avoid to have options.

When I started as co-editor of the linear protection draft
it was my objective to use G.8131 as basis because the protocol
described in G.8131 is based on experience with that protocol
in other packet technologies and TDM.

However, the other editors made several changes to the protocol
which made it in fact a new -untested- protocol.

That is the reason I resigned as co-editor and support draft-zulr
because that is still based on G.8131 and has been used in
interop tests.

Best regards, Huub.


> -----Original Message-----
> From: Huub van Helvoort [mailto:[e-mail]]
> Sent: Monday, December 27, 2010 2:37 PM
> To: Saravanan P
> Cc: [e-mail]
> Subject: Re: [mpls-tp] Linear Ether APS-g8031
>
> Hello Saravanan,
>
> You wrote:
>
>> I am implementing Ether APS channel functionality over pseudo wire/LSP
>> and using BFD for CCM . As per my understanding Liner protection
>> switching functionality shall be implemented by two standard
>> IETF(draft-ietf-mpls-tp-linear-protection) and another one is I-TUT (g8031).
>
> FYI: G.8031 is the linear protection for Ethernet.
> G.8131 is linear protection for MPLS-TP, see also http://tools.ietf.org/html/draft-zulr-mpls-tp-linear-protection-switching
> which is based on G.8131.
>
>> CCM functionality would be either y.1731 or BFD but EtherAps should be
>> g8031 or IETF.
>
> The linear protection uses the SF (signal/service fail) as trigger.
> SF detection can be based on MT-CCM defined in
> http://tools.ietf.org/html/draft-bhh-mpls-tp-oam-y1731
> or on extended BFD.
>
>> Is this combination work in field and any one foresee interoperability
>> issue?
>
> The MT-CCM and G.8131 combination has been tested several times by EANTC and is deployed in China by major operators in many nodes.
>
>> I don’t see anywhere in requirement document for g8031 as an APS
>> option on LSP/PW.
>
> As I mentioned above look for G.8131, but you will not find that in any requirement document as this is considered a solution of the generic "linear protection requirement".
>
> Best regards, Huub.


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