© 2006 Cisco Systems, Inc. All rights reserved. MPLS v2.28-1 MPLS TE Overview Configuring MPLS TE on Cisco IOS Platforms.

© 2006 Cisco Systems, Inc. All rights reserved. MPLS v2.2—8-1

MPLS TE Overview

Configuring MPLS TE on Cisco IOS Platforms


Outline

• Overview

• MPLS TE Configuration Road Map

• Enabling Device-Level MPLS TE Support

• Enabling MPLS TE Support in IS-IS

• Enabling MPLS TE Support in OSPF

• Enabling Basic MPLS TE on an Interface

• Creating and Configuring a Traffic Tunnel

• Mapping Traffic into Tunnels with Autoroute

• Summary


MPLS TE Configuration Road Map

• Use device supporting MPLS.

– Implement ip cef global configuration command.

• Use IGP supporting MPLS TE.

– OSPF

– IS-IS

• Enable MPLS TE tunnels.

– Configure mpls traffic-eng tunnels (global configuration mode).

– Configure mpls traffic-eng tunnels (interface configuration mode).

• Create and configure traffic tunnels.

• Deploy traffic tunnels with autoroute.


ip cef

router(config)#

• Enables IP CEF switching

Enabling Device-Level MPLS TE Support

mpls traffic-eng tunnels

router(config)#

• Enables the MPLS TE tunnel feature on a device


Implementing Device-Level MPLS TE Support

ip cef [distributed]mpls traffic-eng tunnels


Enabling MPLS TE Support in IS-IS

mpls traffic-eng {level-1 | level-2}

router(config-router)#

• Turns on MPLS traffic engineering for IS-IS Level 1 or Level 2

mpls traffic-eng router-id {interface}


• Specifies the interface to be associated with the TE router identifier (also endpoint of a tunnel)

metric-style wide


• Configures a router to generate and accept only new-style TLV objects


Implementing MPLS TE Support in IS-IS

ip cefmpls traffic-eng tunnels

router isis mpls traffic-eng router-id Loopback0 mpls traffic-eng level-2 metric wide


Enabling MPLS TE Support in OSPF

mpls traffic-eng area area-num


• Turns on OSPF traffic engineering for the area

mpls traffic-eng router-id interface


• Specifies the interface to be associated with the TE router identifier (also endpoint of a tunnel)


Implementing MPLS TE Support in OSPF


router ospf 101 mpls traffic-eng router-id Loopback0 mpls traffic-eng area 0


ip rsvp bandwidth [interface-kbps [single-flow-kbps]]

router(config-if)#

• Enables RSVP for IP on an interface and specify amount of bandwidth to be reserved

Enabling Basic MPLS TE on an Interface

mpls traffic-eng tunnels

router(config-if)#

• Enables the MPLS TE tunnel feature on an interface

mpls ip

router(config-if)#

• Enables MPLS on an interface


Implementing Basic MPLS TE on an Interface


router isis mpls traffic-eng router-id Loopback0 mpls traffic-eng level-1 metric wide

interface serial 0/0 mpls ip mpls traffic-eng tunnels ip rsvp bandwidth 128


ip unnumbered type number

• Enables IP on the interface, and brings it up without a unique IP address

router(config-if)#

Creating a Tunnel

interface tunnel number

router(config)#

• Configures a tunnel interface

tunnel destination ip-address

• Specifies the destination for the tunnel

• The tunnel source command is not needed.

router(config-if)#


Example: Creating a Tunnel Interface

...interface tunnel 0 ip unnumbered loopback 0 tunnel destination 10.1.1.2


tunnel mpls traffic-eng bandwidth bandwidth

• Configures the requested bandwidth for the MPLS TE tunnel

tunnel mode mpls traffic-eng

• Sets the tunnel encapsulation mode to MPLS TE

Creating and Configuring a Traffic Tunnel

router(config-if)#

router(config-if)#

router(config-if)#

tunnel mpls traffic-eng priority setup-priority [hold-priority]

• Configures the setup and reservation priority for an MPLS TE tunnel


Creating and Configuring a Traffic Tunnel (Cont.)

tunnel mpls traffic-eng path-option number {dynamic | explicit {name path-name | path-number}} [lockdown]

router(config-if)#

• Configures the tunnel to use a named IP explicit path or a path dynamically calculated from the TE topology database

ip explicit-path {name word | identifier number} [{enable | disable }]

router(config)#

• Enters the subcommand mode for IP explicit paths and creates or modifies the specified path

next-address ip-address

router(cfg-ip-expl-path)#

• Specifies the next IP address in the explicit path


tunnel mpls traffic-eng autoroute announce

router(config-if)#

• Causes the IGP to use the tunnel in its enhanced SPF

Deploying Traffic Tunnels with Autoroute


Example: Configuring TE Options on a Tunnel Interface

ip explicit-path name via_P1 enable next-address 10.1.1.12 next-address 10.1.1.2 interface tunnel 0 ip unnumbered Loopback0 tunnel destination 10.1.1.2 tunnel mode mpls traffic-eng tunnel mpls traffic-eng priority 3 3 tunnel mpls traffic-eng bandwidth 128 tunnel mpls traffic-eng path-option 1 explicit name via_P1 tunnel mpls traffic-eng autoroute announce


Summary

• Required tasks to implement TE in a MPLS VPN network include:– Enabling device-level MPLS TE support on PE and P

routers

– Enabling MPLS TE support in an IS-IS environment on PE and P routers

– Enabling MPLS TE support in an OSPF environment on PE and P routers

– Enabling MPLS TE on an interface on PE and P routers

– Creating and configuring a traffic tunnel on ingress PE router

– Enabling traffic tunnels with autoroute in ingress PE router


© 2006 Cisco Systems, Inc. All rights reserved. MPLS v2.28-1 MPLS TE Overview Configuring MPLS TE on Cisco IOS Platforms.

Documents

mpls v2

mpls te tunnels

mpls traffic engineering

mpls te tunnel slide

basic mpls te

mpls te overview

interface mpls ip routerconfig

mpls te tunnel feature