Re: OSPF DBDs

DBD's are also used to enforce the "Mastership" of an OSPF peering
relationship. During the "Exstart" phase of the peering, OSPF sends DBD's to
enforce a Master and Slave state for peers that will Start the Exchange.

The "Master" bit and the "More Bit" are sent initially by both peers in a
DBD but will negotiate based on the higher router-id. The peer with the
higher router-id has its "More" bit and "Master" bit remain set. The lower
router-id does not set the "Master" bit on the next DBD just prior to
exchanging LSA's.

If this is seen as not being correct by another CCIE or CCIE Candadite.
Please let me know. I am always looking for different explanations or views
or correction if NEEDED.

Paul

-- 
Paul Negron
CCIE# 14856 CCSI# 22752
Senior Technical Instructor
www.micronicstraining.com
> From: <jnhdny_at_gmail.com>
> Reply-To: <jnhdny_at_gmail.com>
> Date: Mon, 16 May 2011 17:45:33 +0000
> To: <ccielab_at_groupstudy.com>
> Subject: OSPF DBDs
> 
> Please, does anyone know *why* DBDs have to be exchanged before actual LS
> requests and updates are sent? Why not just send all the LSAs in the database
> to the neighbour?
> Sent from my BlackBerry wireless device from MTN
> 
> 
> Blogs and organic groups at http://www.ccie.net
> 
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html
Blogs and organic groups at http://www.ccie.net