Ospf Point-To-Point Links - Dell PowerConnect B-FCXs Configuration Manual

An Autonomous System Boundary Router (ASBR) is a router that is running multiple protocols and
serves as a gateway to routers outside an area and those operating with different protocols. The
ASBR is able to import and translate different protocol routes into OSPF through a process known
as redistribution. For more details on redistribution and configuration examples, refer to
route redistribution"
FIGURE 138

OSPF point-to-point links

One important OSPF process is Adjacency. Adjacency occurs when a relationship is formed
between neighboring routers for the purpose of exchanging routing information. Adjacent OSPF
neighbor routers go beyond the simple Hello packet exchange; they exchange database
information. In order to minimize the amount of information exchanged on a particular segment,
one of the first steps in creating adjacency is to assign a Designated Router (DR) and a Backup
Designated Router (BDR). The Designated Router ensures that there is a central point of contact,
thereby improving convergence time within a multi-access segment.
PowerConnect B-Series FCX Configuration Guide
53-1002266-01
on page 953.
OSPF operating in a network
Area 0.0.0.0 Backbone
Area 192.5.1.0
Router A
Router C
Area 195.5.0.0
208.5.1.1
Router D
Area Border
Router (ABR)
Virtual Link
e8
206.5.1.1
Router B
Area Border
Router (ABR)
Router G
RIP Router
Overview of OSPF
Area 200.5.0.0
Router E
Router F
Autonomous System
Border Router (ASBR)
29
"Enabling
923