Reauthenticate Port(s) ..................................................................................................................................................78
RADIUS Server .............................................................................................................................................79
Configuring Layer 3 IP Networking.................................................................................................. 81
Setting Up IP Interfaces .................................................................................................................................81
MD5 Key........................................................................................................................................................83
Route Redistribution Settings.........................................................................................................................83
Static ARP Table............................................................................................................................................85
Static/Default Route .......................................................................................................................................86
Routing Information Protocol (RIP)...............................................................................................................87
RIP Version 1 Message Format....................................................................................................................................88
RIP 1 Message..............................................................................................................................................................88
RIP 1 Route Interpretation ...........................................................................................................................................89
RIP Version 2 Extensions.............................................................................................................................................89
RIP2 Message Format ..................................................................................................................................................89
Enabling RIP................................................................................................................................................................90
Setting Up RIP .............................................................................................................................................................90
Configuring OSPF..........................................................................................................................................91
OSPF Authentication....................................................................................................................................................91
Message Digest Authentication (MD-5).......................................................................................................................91
Simple Password Authentication..................................................................................................................................91
The Backbone and Area 0 ............................................................................................................................................92
Virtual Links ................................................................................................................................................................92
Areas Not Physically Connected to Area 0 ..................................................................................................................92
Partitioning the Backbone ............................................................................................................................................92
Neighbors.....................................................................................................................................................................92
Adjacencies ..................................................................................................................................................................93
Designated Router Election..........................................................................................................................................93
Building Adjacency......................................................................................................................................................93
Adjacencies on Point-to-Point Interfaces .....................................................................................................................94
OSPF Packet Formats...................................................................................................................................................94
The OSPF Packet Header.............................................................................................................................................94
The Hello Packet ..........................................................................................................................................................95
The Database Description Packet.................................................................................................................................97
The Link-State Request Packet ....................................................................................................................................98
The Link-State Update Packet......................................................................................................................................99
The Link-State Acknowledgment Packet ...................................................................................................................100
Link-State Advertisement Formats.............................................................................................................................100
The Link State Advertisement Header .......................................................................................................................101
Router Links Advertisements.....................................................................................................................................102
Network Links Advertisements..................................................................................................................................105
Summary Link Advertisements..................................................................................................................................105