Re: [Technical Errata Reported] RFC4666 (2518)

On Sep 14, 2010, at 1:00 PM, Karmarkar Suyash wrote:

> Hi,
> 
> 
> We plan to implement both the RFCs and we were in thought, why the
> parameter values were different for SUA and M3UA as the parameters
> functionality happens to be same.
> 
> Can you please elaborate your comment?
Hi Suyash,

I think the reason was to decouple the several protocol specs
to let them evolve at different speed. Now there a several
products out and in production networks. Therefore these
numbers can't be changed anymore without breaking interoperability
with all these implementations out there.

I hope this clarifies things.

Best regards
Michael
> 
> Thanks in advance.
> 
> Regards,
> Suyash Karmarkar
> 
> -----Original Message-----
> From: David Laight [mailto:[email protected]] 
> Sent: Tuesday, September 14, 2010 4:24 PM
> To: RFC Errata System; [email protected]; [email protected];
> [email protected]; [email protected]; [email protected]
> Cc: [email protected]; Karmarkar Suyash
> Subject: RE: [Sigtran] [Technical Errata Reported] RFC4666 (2518)
> 
> Is someone having us on ????
> The suggested change will completely break interworking between systems.
> 
> 	David 
> 
>> -----Original Message-----
>> From: [email protected] 
>> [mailto:[email protected]] On Behalf Of RFC Errata System
>> Sent: 14 September 2010 11:54
>> To: [email protected]; [email protected]; 
>> [email protected]; [email protected]; [email protected]
>> Cc: [email protected]; [email protected]; 
>> [email protected]
>> Subject: [Sigtran] [Technical Errata Reported] RFC4666 (2518)
>> 
>> 
>> The following errata report has been submitted for RFC4666,
>> "Signaling System 7 (SS7) Message Transfer Part 3 (MTP3) - 
>> User Adaptation Layer (M3UA)".
>> 
>> --------------------------------------
>> You may review the report below and at:
>> http://www.rfc-editor.org/errata_search.php?rfc=4666&eid=2518
>> 
>> --------------------------------------
>> Type: Technical
>> Reported by: Suyash Karmarkar <[email protected]>
>> 
>> Section: 3.2.
>> 
>> Original Text
>> -------------
>> 3.2. Variable-Length Parameter Format
>> 
>> M3UA-Specific parameters. These TLV parameters are specific to the
>> M3UA protocol:
>> 
>> Registration Result                               0x0208
>> Deregistration Result                             0x0209
>> Local Routing Key Identifier                      0x020a
>> 
>> 
>> Corrected Text
>> --------------
>> 3.2. Variable-Length Parameter Format
>> 
>> Common Parameters. These TLV parameters are common across the
>> different adaptation layers:
>> 
>> Registration Result                 0x0014,
>> Deregistration Result               0x0015,
>> Local Routing Key Identifier        0x0018,
>> 
>> Notes
>> -----
>> As the above three parameters mentioned are used for the same 
>> purpose in RFC 3868 and in RFC 4666. So the above parameters 
>> in RFC 4666 Section 3.2, the M3UA-Specific parameters can be 
>> considered to move them into the common parameters section 
>> 3.2 of RFC 4666 with the above sepecified values.
>> 
>> The advantage could be, for one who implements both SUA & 
>> M3UA can use the same encoding and decoding mechanisms/code 
>> for both the implementations.
>> 
>> Instructions:
>> -------------
>> This errata is currently posted as "Reported". If necessary, please
>> use "Reply All" to discuss whether it should be verified or
>> rejected. When a decision is reached, the verifying party (IESG)
>> can log in to change the status and edit the report, if necessary. 
>> 
>> --------------------------------------
>> RFC4666 (draft-ietf-sigtran-rfc3332bis-06)
>> --------------------------------------
>> Title               : Signaling System 7 (SS7) Message 
>> Transfer Part 3 (MTP3) - User Adaptation Layer (M3UA)
>> Publication Date    : September 2006
>> Author(s)           : K. Morneault, Ed., J. Pastor-Balbas, Ed.
>> Category            : PROPOSED STANDARD
>> Source              : Signaling Transport
>> Area                : Real-time Applications and Infrastructure
>> Stream              : IETF
>> Verifying Party     : IESG
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> 
> 
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