Re: single/double exchange mode doubt

Ankit,

Ankit Kumar Sharma wrote:                                            (Mon, 16 Jul 2007 17:22:21)
> 
>    Brian,
> 
>    On 7/16/07, Brian F. G. Bidulock <[1][email protected]> wrote:
> 
>      Ankit,
>      Ankit  Kumar  Sharma wrote:                       (Mon, 16 Jul 2007
>      14:58:17)
>      >
>      >    Brian,
>      >        My  apologies  for  not  making  myself very clear. I have
>      modified
>      >    steps  (2)  and  (3)  of  earlier scenario to make myself more
>      clear below.
>      >            ----------                       ------------
>      >            |IPSP 1|----------------------|IPSP A |
>      >            ----------                       -----------
>      >    1)  IPSP1  is  serving  AS-1(PC  111)  and  IPSP  A is serving
>      AS-A(PC 999)
>      >    with rc=x. They are running happily in single exchange mode.
>      >    2)  Now,  I  want  to add an additional AS at IPSP1 ex: AS2(PC
>      222). For
>      >    AS2,  I  need  to  send  Registration  Request with my routing
>      key and
>      >    suppose  peer  side  i.e  IPSP-A  has  returned  rc=y  in
>      Registration
>      >    Response message.
>      >    3)  After  getting  the  Registration  Response  from  IPSP-A,
>        I fire
>      >    ASP-Active(rc=y)  from  IPSP-1   towards   IPSP-A.  Now,  what
>      should be the
>      >    response from IPSP-A?
>      ASP-Active-Ack(rc=y).
> 
>    After  sending ASP Active ack(rc==y), IPSP-A is saying to peer that it
>    could  receive  DATA with rc=y as well(at IPSP-A), but note that there
>    is NO local AS at IPSP-A which could be identified with rc==y.

Yes, there is a local AS at IPSP-A: it is the AS for which IPSP-A sent
ASP-Active(rc=y)!

--brian


> Now, if
>    IPSP-A receives DATA with RC=y, what should it do?
>    If I am not wrong then by sending ASP-Active-Ack(rc==y) from IPSP-A, I
>    am depicting as if, IPSP-A is working in double exchange mode.
>    Please look at the following scenario(assume single exchange mode):
>                ----------                       ------------
>                |IPSP 1|----------------------|IPSP A |
>                ----------                       -----------
>    1)  IPSP-1  wants  to  receive  traffic  for  AS-1 and IPSP-A wants to
>    receive traffic for AS-A.
>    2)  IPSP-1  sends the routing key of AS-1 through Registration request
>    API, and it receives RC=x from IPSP-A in Registration response.
>    3)  IPSP-A  sends the routing key of AS-A through Registration request
>    API, and it receives RC=y from IPSP-B in Registration response.
>    4)  Now,  IPSP-1  sends  ASP-Active(rc==x).  How  does  IPSP-A  should
>    respond?
> 
>      --brian
>      --
>      Brian F. G. Bidulock
>      [2][email protected]
>      [3]http://www.openss7.org/
> 
>    Cheers,
>    Ankit
> 
> References
> 
>    1. mailto:[email protected]
>    2. mailto:[email protected]
>    3. http://www.openss7.org/

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