Network Address Translation and Router

|CCNA4: Commands |

WAN Technologies
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Cisco Networking Academy Program CCNA 4: WAN Technologies v3.1.1

1 Module 1: Scaling IP Addresses 3

1.1 NAT and PAT 3 1.1.1 Configuring static NAT 3 1.1.2 Configuring dynamic NAT 3 1.1.3 Configuring NAT Overload (PAT) 4 1.1.4 Verifying NAT and PAT configuration 4 1.1.5 Troubleshooting NAT and PAT configuration 4

1.2 DHCP 5 1.2.1 Configuring DHCP Operation 5 1.2.2 Verifying DHCP Operation 5 1.2.3 Troubleshooting DHCP Configuration 5

2 Module 3: Point-to-Point Protocol (PPP) 6

2.1 Configuring HDLC Encapsulation 6

2.2 Troubleshooting a Serial Interface 6

2.3 Configuring PPP Encapsulation 6

2.4 Configuring PPP Authentication 6

2.5 Verifying the Serial PPP Encapsulation Configuration 7

2.6 Troubleshooting the Serial PPP Encapsulation Configuration 7

3 Module 3: ISDN and DDR 7

3.1 Configuring ISDN BRI 7

3.2 Configuring ISDN PRI 8

3.3 Verifying the ISDN Configuration 8

3.4 Troubleshooting the ISDN Configuration 8

3.5 Defining Static Routes for DDR 8

3.6 Specifying Interesting Traffic for DDR 9

3.7 Configuring DDR Dialer Information 9

3.8 Configuring Dialer Profiles 9

3.9 Verifying the DDR Configuration 10

4 Module 5: Frame Relay 10

4.1 Basic Frame Relay Configuration 10

4.2 Verifying Operation and Confirming Connectivity 10

4.3 Configuring Subinterfaces 10

4.4 Configuring Optional Commands 11

Module 1: Scaling IP Addresses

1 NAT and PAT

1 Configuring static NAT

Router(config)#ip nat inside source static local-ip global-ip
Router(config)#interface type number //inside interface
Router(config-if)#ip nat inside
Router(config-if)#interface type number //outside interface
Router(config-if)#ip nat outside

Example:

Router(config)#ip