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This chapter is from the book

This chapter is from the book

Configuration Example: Multi-Area IS-IS

Figure 4-2 shows the network topology for the configuration that follows, which demonstrates how to configure Integrated IS-IS using the commands covered in this chapter.

Figure 4-2

Figure 4-2 Multi-Area IS-IS

Mazatlan Router

Router>enable

Moves to privileged mode.

Router#configure terminal

Moves to global configuration mode.

Router(config)#hostname Mazatlan

Assigns the host name to the router.

Mazatlan(config)#interface fastethernet 0/0

Enters interface configuration mode.

Mazatlan(config-if)#ip address 192.168.0.1 255.255.255.0

Assigns an IP address and netmask.

Mazatlan(config-if)#ip router isis

Enables IS-IS routing on this interface.

Mazatlan(config-if)#no shutdown

Enables the interface.

Mazatlan(config-if)#int loopback 0

Moves to interface configuration mode.

Mazatlan(config-if)#ip address 172.16.10.1 255.255.255.0

Assigns an IP address and netmask.

Mazatlan(config-if)#ip router isis

Enables IS-IS routing on this interface.

Mazatlan(config-if)#interface serial 0/0

Moves to interface configuration mode.

Mazatlan(config-if)#ip address 10.10.10.1 255.255.255.252

Assigns an IP address and netmask.

Mazatlan(config-if)#ip router isis

Enables IS-IS routing on this interface.

Mazatlan(config-if)#clock rate 56000

Sets the clock rate.

Mazatlan(config-if)#no shutdown

Enables the interface.

Mazatlan(config-if)#exit

Returns to global configuration mode.

Mazatlan(config)#router isis

Enables the IS-IS routing process.

Mazatlan(config-router)#net 49.0001.1111.1111.1111.00

Configures the NET.

Mazatlan(config-router)#is-type level-1-2

The router will perform both Level 1 and 2 routing.

Mazatlan(config-router)#exit

Returns to global configuration mode.

Mazatlan(config)#exit

Returns to privileged mode.

Mazatlan#copy running-config startup-config

Saves the configuration to NVRAM.

Acapulco Router

Router>enable

Moves to privileged mode.

Router#configure terminal

Moves to global configuration mode.

Router(config)#hostname Acapulco

Assigns the host name to the router.

Acapulco(config)#interface fastethernet 0/0

Enters interface configuration mode.

Acapulco(config-if)#ip address 192.168.0.2 255.255.255.0

Assigns an IP address and netmask.

Acapulco(config-if)#ip router isis

Enables IS-IS routing on this interface.

Acapulco(config-if)#no shut

Enables the interface.

Acapulco(config-if)#interface loopback 0

Moves to interface configuration mode.

Acapulco(config-if)#ip address 172.16.20.1 255.255.255.0

Assigns an IP address and netmask.

Acapulco(config-if)#ip router isis

Enables IS-IS routing on this interface.

Acapulco(config-if)#exit

Returns to global configuration mode.

Acapulco(config)#router isis

Enables the IS-IS routing process.

Acapulco(config-router)#net 49.0001.2222.2222.2222.00

Configures the NET.

Acapulco(config-router)#is-type level-1

The router will perform Level 1 routing only.

Acapulco(config-router)#exit

Returns to global configuration mode.

Acapulco(config)#exit

Returns to privileged mode.

Acapulco#copy running-config startup-config

Saves the configuration to NVRAM.

Cancun Router

Router>enable

Moves to privileged mode.

Router#configure terminal

Moves to global configuration mode.

Router(config)#hostname Cancun

Assigns a host name to the router.

Cancun(config)#interface serial 0/0

Enters interface configuration mode.

Cancun(config-if)#ip address 10.10.10.2 255.255.255.252

Assigns an IP address and netmask.

Cancun(config-if)#ip router isis

Enables IS-IS routing on this interface.

Cancun(config-if)#no shutdown

Starts the interface.

Cancun(config-if)#interface loopback 0

Moves to interface configuration mode.

Cancun(config-if)#ip address 172.16.30.1 255.255.255.0

Assigns an IP address and netmask.

Cancun(config-if)#ip router isis

Enables IS-IS routing on this interface.

Cancun(config-if)#exit

Returns to global configuration mode.

Cancun(config)#router isis

Enables the IS-IS routing process.

Cancun(config-router)#net 49.0002.3333.3333.3333.00

Configures the NET.

Cancun(config-router)#is-type level-2-only

Router will perform Level 2 routing only.

Cancun(config-router)#exit

Returns to global configuration mode.

Cancun(config)#exit

Returns to privileged mode.

Cancun#copy running-config startup-config

Saves the configuration to NVRAM.

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