Category Archives: OSPFv3

OSPF Designated Router / Backup Designated Router Deep Dive

In this deep-dive tutorial on the OSPF Designated Router (DR) and Backup Designated Router (BDR) we go well beyond the activity to discuss how John T. Moy came up with the idea for the OSPF DR, the purpose and function of the DR/BDR, we compare and contrast IS-IS and OSPF, discuss the semantics of the Type 2 LSA (Network), why OSPF treats multiaccess/broadcast segments different than point-to-point links, and much, much more! Enjoy!