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Implementing Frame Mode MPLS

Sample Chapter is provided courtesy of Cisco Press.
Date: Jun 16, 2008.

Chapter Information

Configuring Cisco Express Forwarding
Configuring MPLS on a Frame Mode Interface
Configuring MTU Size in Label Switching
Configuration Example: Configuring Frame Mode MPLS

Chapter Description

This chapter covers configuring Cisco Express Forwarding, verifying CEF, troubleshooting CEF, configuring MPLS on a Frame Mode interface, and configuring MTU size in label switching.

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Configuration Example: Configuring Frame Mode MPLS

Figure 3-1 shows the network topology for the configuration that follows, which shows how to configure Frame Mode MPLS using commands covered in this chapter.

Figure 3-1 Network Topology for Frame Mode MPLS Configuration Example

R1 Router

`Router>``enable`	Moves to privileged mode
`Router#``configure terminal`	Moves to global configuration mode
`Router(config)#``hostname R1`	Assigns hostname to router
`R1(config)#``ip cef`	Enables CEF on device (enabled by default)
`R1(config)#``mpls ip`	Enables MPLS globally on device (enabled by default)
`R1(config)#``interface loopback 0`	Moves to interface configuration mode
`R1(config-if)#``ip address 172.16.1.1 255.255.255.0`	Assigns IP address and netmask
`R1(config-if)#``interface fastethernet 0/0`	Moves to interface configuration mode
`R1(config-if)#``ip address 172.16.10.1 255.255.255.0`	Assigns IP address and netmask
`R1(config-if)#``mpls ip`	Enables MPLS on this interface
`R1(config-if)#``mpls mtu 1508`	Changes the maximum size of the packet allowed on this interface to 1508 bytes
`R1(config-if)#``no shutdown`	Activates interface
`R1(config-if)#``exit`	Returns to global configuration mode
`R1(config)#``router eigrp 1`	Enables the EIGRP routing process for AS 1
`R1(config-router)#``network 172.16.0.0`	Specifies which network to advertise in EIGRP
`R1(config-router)#``no auto-summary`	Turns off the auto-summarization feature
`R1(config-router)#``exit`	Returns to global configuration mode
`R1(config)#``exit`	Returns to privileged mode
`R1#``copy running-config startup-config`	Saves configuration in NVRAM

R2 Router

`Router>``enable`	Moves to privileged mode
`Router#``configure terminal`	Moves to global configuration mode
`Router(config)#``hostname R2`	Assigns hostname to router
`R2(config)#``ip cef`	Enables CEF on device (enabled by default)
`R2(config)#``mpls ip`	Enables MPLS globally on device (enabled by default)
`R2(config)#``interface loopback 0`	Moves to interface configuration mode
`R2(config-if)#``ip address 172.16.2.1 255.255.255.0`	Assigns IP address and netmask
`R2(config-if)#``interface fastethernet 0/0`	Moves to interface configuration mode
`R2(config-if)#``ip address 172.16.10.2 255.255.255.0`	Assigns IP address and netmask
`R2(config-if)#``mpls ip`	Enables MPLS on this interface
`R2(config-if)#``mpls mtu 1508`	Changes the maximum size of the packet allowed on this interface to 1508 bytes
`R2(config-if)#``no shutdown`	Activates interface
`R2(config-if)#``interface serial 0/0/0`	Moves to interface configuration mode
`R2(config-if)#``ip address 172.16.20.5 255.255.255.252`	Assigns IP address and netmask
`R2(config-if)#``mpls ip`	Enables MPLS on this interface
`R2(config-if)#``clock rate 64000`	Enables clock rate for this interface
`R2(config-if)#``no shutdown`	Activates interface
`R2(config-if)#``exit`	Returns to global configuration mode
`R2(config)#``router eigrp 1`	Enables the EIGRP routing process for AS 1
`R2(config-router)#``network 172.16.0.0`	Specifies which network to advertise in EIGRP
`R2(config-router)#``no auto-summary`	Turns off the auto-summarization feature
`R2(config-router)#``exit`	Returns to global configuration mode
`R2(config)#``exit`	Returns to privileged mode
`R2#``copy running-config startup-config`	Saves configuration in NVRAM

R3 Router

`Router>``enable`	Moves to privileged mode
`Router#``configure terminal`	Moves to global configuration mode
`Router(config)#``hostname R3`	Assigns hostname to router
`R3(config)#``ip cef`	Enables CEF on device (enabled by default)
`R3(config)#``mpls ip`	Enables MPLS globally on device (enabled by default)
`R3(config)#``interface loopback 0`	Moves to interface configuration mode
`R3(config-if)#``ip address 172.16.3.1 255.255.255.0`	Assigns IP address and netmask
`R3(config-if)#``interface serial 0/0/0`	Moves to interface configuration mode
`R3(config-if)#``ip address 172.16.20.6 255.255.255.252`	Assigns IP address and netmask
`R3(config-if)#``mpls ip`	Enables MPLS on this interface
`R3(config-if)#``no shutdown`	Activates interface
`R3(config-if)#``exit`	Returns to global configuration mode
`R3(config)#``router eigrp 1`	Enables the EIGRP routing process for AS 1
`R3(config-router)#``network 172.16.0.0`	Specifies which network to advertise in EIGRP
`R3(config-router)#``no auto-summary`	Turns off the auto-summarization feature
`R3(config-router)#``exit`	Returns to global configuration mode
`R3(config)#``exit`	Returns to privileged mode
`R3#``copy running-config startup-config`	Saves configuration in NVRAM

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