Re: ASP Identifier handling in double exchange IPSP-IPSP scenarios

ankur,

My suggestion is use SE mode instead of DE mode.  IMO DE is broken by design.

--brian

ankur arora wrote:                                   (Tue, 14 Aug 2007 07:41:07)
> 
>    Hi Brian,
> 
> 
> 
>    As per RFC 4666 Section 5.6.2
> 
>    "    In  this approach, only one single exchange of ASP Up message can
>    be
>       considered sufficient since the response by the other peer can be
>       considered a notice that it is in ASP_UP state"
> 
>    So,  single  exchange  is  sufficient  but ASP UP would come from both
>    sides also.
> 
>    Also as per RFC 4666:-
>        "The  optional ASP Identifier parameter is specifically useful for
>    IPSP
>       communication.  In that case, the IPSP answering the ASP UP message
>       MAY include its own ASP Identifier value."
> 
> 
> 
>    One of two cases should be possible
> 
> 
> 
>    Case  1:-   Consider  double  exchange  Mode ( with single exchange of
>    ASPUP/ASPUP-ACK) message.
> 
>    IPSP1 side
>                        IPSP2 side
> 
> 
> 
>                               ------      ASPUP    (N/w   ASP   id,   say
>    X)---------->   Store X as Nw_asp_id
> 
>    Store Y as Nw_asp_id  <------- ASPUP- ACK (N/w ASP id, say  Y)--------
> 
> 
> 
>    Case  2:-  Consider  double  exchange  Mode  ( with double exchange of
>    ASPUP/ASPUP-ACK) message.
> 
> 
> 
>    IPSP1 side
>                        IPSP2 side
> 
>    
> 
>                               ------      ASPUP    (N/w   ASP   id,   say
>    X)---------->   Store X as Nw_asp_id
> 
>    Store Y as Nw_asp_id  <------- ASPUP- ACK (N/w ASP id, say  Y)--------
> 
>    ?                        <-------------   ASPUP   (N/w   ASP  id,  say
>    Z)----------------
> 
>    then what will be the handling at IPSP1 side.
> 
>    a)   Replace  Y  by  Z as new nw_asp_id  <--------- ASPUP (N/w ASP id,
>    say  Z)--------
> 
>    b) Any ERROR message
> 
>    Please suggest!!!!
> 
>    Regards
>    Ankur Arora
>      _________________________________________________________________
> 
>    Luggage? GPS? Comic books?
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> 
> References
> 
>    1. http://us.rd.yahoo.com/evt=48249/*http://search.yahoo.com/search?fr=oni_on_mail&p=graduation+gifts&cs=bz

-- 
Brian F. G. Bidulock
[email protected]
http://www.openss7.org/