OSPF Areas (Part 2) - Backbone and Normal Areas
Links:
RFC 2328 – OSPF Version 2
RFC 2740 – OSPF for IPv6
Backbone area (Area 0)
Let's start with the Backbone area. The backbone area is just as the name implies the backbone of the OSPF domain. Think of the backbone area as the hub for OSPF. The backbones main responsibility is to distribute routing information (LSAs) between non-backbone areas.
Breakdown of Backbone Area:
Backbone =
Source: OSPF Areas (Part 2) - Backbone and Normal Areas (//)
From http://blog.movingonesandzeros.net/