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Chapter 20: IP Configuration

Enabling the Switch for Routing ................................................................................................................... 20-1

Router Configuration Modes .................................................................................................................. 20-1

Entering Router Configuration Modes .................................................................................................... 20-2

Example ................................................................................................................................................. 20-3

Routing Interfaces ........................................................................................................................................ 20-3

IPv4 Interface Addresses ....................................................................................................................... 20-3

IP Static Routes ............................................................................................................................................ 20-4

Configuring Static Routes ...................................................................................................................... 20-5

Testing Network Connectivity ....................................................................................................................... 20-5

The ARP Table ............................................................................................................................................. 20-6

Proxy ARP .............................................................................................................................................. 20-7

ARP Configuration ................................................................................................................................. 20-7

IP Broadcast Settings ................................................................................................................................... 20-7

Directed Broadcast ................................................................................................................................. 20-7

UDP Broadcast Forwarding ................................................................................................................... 20-8

DHCP and BOOTP Relay ...................................................................................................................... 20-9

IP Broadcast Configuration .................................................................................................................... 20-9

Configuring ICMP Redirects ....................................................................................................................... 20-10

Terms and Definitions ................................................................................................................................. 20-10

Chapter 21: IPv4 Basic Routing Protocols

Configuring RIP ............................................................................................................................................ 21-1

Using RIP in Your Network .................................................................................................................... 21-1

RIP Configuration Overview ................................................................................................................... 21-1

RIP Router Configuration .................................................................................................................21-1

RIP Interface Configuration ..............................................................................................................21-2

RIP Configuration Example .................................................................................................................... 21-3

Configuring IRDP .......................................................................................................................................... 21-5

Using IRDP in Your Network .................................................................................................................. 21-5

IRDP Configuration Overview ................................................................................................................ 21-5

IRDP Configuration Example ................................................................................................................. 21-5

Chapter 22: Configuring OSPFv2

OSPF Overview ............................................................................................................................................ 22-1

OSPF Areas ........................................................................................................................................... 22-2

OSPF Router Types ............................................................................................................................... 22-3

Designated Router ................................................................................................................................. 22-3

Authentication ........................................................................................................................................ 22-3

Basic OSPF Topology Configuration ............................................................................................................ 22-3

Configuring the Router ID ...................................................................................................................... 22-4

Configuring the Designated Router ........................................................................................................ 22-5

Configuring Router Priority ...............................................................................................................22-6

Example............................................................................................................................................22-6

Configuring the Administrative Distance for OSPF Routes .................................................................... 22-7

Configuring SPF Timers ......................................................................................................................... 22-7

Configuring OSPF Areas .............................................................................................................................. 22-8

Configuring Area Range ......................................................................................................................... 22-8

Example............................................................................................................................................22-8

Configuring a Stub Area ......................................................................................................................... 22-9

Stub Area Default Route Cost ........................................................................................................22-10

Example..........................................................................................................................................22-10

Configuring a Not So Stubby Area (NSSA) .......................................................................................... 22-11

Example..........................................................................................................................................22-12

Configuring Area Virtual-Links ............................................................................................................. 22-12