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Re: wait timer, ExStart, and adj formation
From: Acee Lindem (aceeREDBACK.COM)
Date: Tue Mar 11 2003 - 13:29:11 CST
This is normal operation. The router coming out of interface wait
state first will continue to resend the initial database packet every
retransmit interval seconds. The router in wait state will exit
wait state when he receives a hello from the other guy (assuming these are
the only guys on the ethernet and the first has elected himself DR).
> I have an issue dealing with the interaction of the wait timer,
> adjacency formation, and the reception of the DBD packet to
> move into the ExStart of the nbr state machine. This is
> in a Ethernet environment.
> What is occuring is simply stated as the ending of the
> wait timer on one system, an election of DR/BDR and
> the sending of a DBD packet out.
> However, the 2nd system still hadn't ended its wait
> timer and thus no adj has formed. Due to this, the
> rec'd DBD is normally dropped.
> This is going on at a customer site after they have
> mucked with the OSPF code. I know of a simple fix
> to patch the problem, but was looking to get a consensus
> on the frequency of this timing issue being seen.
> Mitchell Erblich
> Sr. Software Engineer