October 1, 2009

OSPF BDR DR election process

This post assumes that you have a basic understanding of OSPF… if not, I suggest jumping over http://en.wikipedia.org/wiki/OSPF for a first quick read. However for the sake of this post, I will go over some basic reminders. The “hello” packet The OSPF routers sends a periodic packet referred to as the hello packet ‘multicast 224.0.0.5’ which is composed of the OSPF header + different fields ID necessary for routers to neighbor and become adjacent. ... Read more