© 2006 cisco systems, inc. all rights reserved. mpls v2.28-1 mpls te overview configuring mpls te...

© 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...

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