[OSPF] LSA Data Base Exchange Between the Master and the Slave

[Biswajit Sadhu <[e-mail]>]

Hi All,

I have a query in the OSPF Design of LSA Data Base Exchange.

In data base exchange process if the master has smaller database the the
slave and the master sends the More bit as zero in its DB packet  then the
slave should also set the M bit to 0 in reply to the master's DB packet
with the same sequence number ?

 Should the data base exchange stop after that. what if the slave had more
lsa's to send to the Master?

What about the vice-versa case where Master has a large Data base to
exchange then the Slave  ?

   As per page 101 .rfc 2328 i am quoting few lines for the same RFC

    http://tools.ietf.org/html/rfc2328


     *   Master
            Increments the DD sequence number in the neighbor data
            structure.  If the router has already sent its entire
            sequence of Database Description Packets, and the just
            accepted packet has the more bit (M) set to 0, the neighbor
            event ExchangeDone is generated.  Otherwise, it should send
            a new Database Description to the slave.

        Slave
            Sets the DD sequence number in the neighbor data structure
            to the DD sequence number appearing in the received packet.
            The slave must send a Database Description Packet in reply.
            If the received packet has the more bit (M) set to 0, and
            the packet to be sent by the slave will also have the M-bit
            **set to 0, the neighbor event ExchangeDone is generated.**
            Note that the slave always generates this event before the
            maste**r.*

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 *Best Regards,*

*Biswajit Sadhu*