[mpich-discuss] How is MPI Initialization done ?

[Ravi Thati]

Hello All,

      I am working with MPICH-G2.
       I came to know  (from mailing search) that  while MPI_Init is called
, the initialization is being done.
      All-to-all exchange of host+port details is done.

My doubt is :

 How the initial communication is established in order to exchange the
hostname+ port number details ?
 How is the hostname+port number details sent and received ? what are the
destination IPs these packets?

 How is all-to-all communication is done? On which ports this will be done ?
 Only after the exchange , each process can communicate with other.

   Thanks for any clarifications.
-- 
Regards,
Ravi.Thati
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