Re: Question about Internet Draft of Encapsulation for Ip over Mpeg2/DVB

[Gorry Fairhurst <gorry@erg.abdn.ac.uk>]

Thanks for the question,

0x0100 is correct, and should  indeed be 256 decimal.

Please note that this draft was an individual submission based on many 
mail threads and discussions - the intention was to write one case that 
could be used a strawman for discussion. Feedback and questions are most 
welcome.

The draft was discussed at the IETF-60 meeting, and the conclusion 
seemed to be that the ipdvb WG should look at further simplification (if 
possible) and then propose adding a revised text to the ULE spec itself. 
Some of this is captured in the meeting slides:

http://www.erg.abdn.ac.uk/ip-dvb/meetings/IETF-60-SanDiego/

Best wishes,

Gorry Fairhurst



Simon Teh wrote:

> Dear all members,
>
>  
>
>            Currently I’m reading an internet draft Ultra Lightweight 
> Encapsulation (ULE) Extension Header. From this document, I’m quite 
> confusing of this line:
>
>  
>
>                
>
>                     Internet Engineering Task Force                
>                 Bernhard Collini-Nocker
>
>                     Internet 
> Draft                                                                   
>                 Hilmar Linder
>
>                     Document: draft-collini-ipdvb-xule-00.txt        
>          University of Salzburg
>
>                                                                             
>                                                     Gorry Fairhurst
>
>                                                                     
>                                             University of Aberdeen
>
>                                               
>                                               
>
>                                                                                             
>
>
>                                                                                             
>
>
>                     Category: Internet 
> Draft                                       May 2004
>
>                     
>
>                     
>
>                             Ultra Lightweight Encapsulation (ULE) 
> Extension Header        
>
>  
>
>                                                                                 
> -
>
>                                                                                 
> -
>
>                                                                                 
> -
>
>                                                                                 
> -
>
>                                                                                 
> -
>
>                                                                                 
> -
>
>                                                                                 
> -
>
>  
>
>  
>
>  
>
>  2.2 Optional Extension Headers
>
>                        
>
>                        A next-layer-header value greater than or equal 
> to 512 decimal
>
>                        (0x0100, hexadecimal) and less than 1536 decimal 
> (0x600,
>
>                        hexadecimal), indicates an Optional Extension 
> Header. When a
>
>                        Receiver encounters a next-layer-header 
> indicating an Optional
>
>                        Extension Headers, it MAY be configured to either:
>
>  
>
>             Is there any mistake or….? I hope somebody could help me. 
> Thanks for reading my mail!
>
>  
>
> Best Regards,
>
> Simon Teh
>
> Universiti Sains Malaysia
>
>