MPLS TE Overview

1. MPLS TE Overview Configuring MPLS TE on Cisco IOS Platforms

2. 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

3. 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.

4. Enabling Device-Level MPLS TE Support router(config)# ip cef • Enables IP CEF switching router(config)# mpls traffic-eng tunnels • Enables the MPLS TE tunnel feature on a device

5. Implementing Device-Level MPLS TE Support ip cef [distributed] mpls traffic-eng tunnels

6. Enabling MPLS TE Support in IS-IS router(config-router)# mpls traffic-eng {level-1 | level-2} • Turns on MPLS traffic engineering for IS-IS Level 1 or Level 2 router(config-router)# mpls traffic-eng router-id {interface} • Specifies the interface to be associated with the TE router identifier (also endpoint of a tunnel) router(config-router)# metric-style wide • Configures a router to generate and accept only new-style TLV objects

7. Implementing MPLS TE Support in IS-IS ip cef mpls traffic-eng tunnels router isis mpls traffic-eng router-id Loopback0 mpls traffic-eng level-2 metric wide

8. Enabling MPLS TE Support in OSPF router(config-router)# mpls traffic-engarea area-num • Turns on OSPF traffic engineering for the area router(config-router)# mpls traffic-eng router-id interface • Specifies the interface to be associated with the TE router identifier (also endpoint of a tunnel)

9. Implementing MPLS TE Support in OSPF ip cef mpls traffic-eng tunnels router ospf 101 mpls traffic-eng router-id Loopback0 mpls traffic-engarea 0

10. Enabling Basic MPLS TE on an Interface router(config-if)# mpls ip • Enables MPLS on an interface router(config-if)# mpls traffic-eng tunnels • Enables the MPLS TE tunnel feature on an interface router(config-if)# ip rsvp bandwidth [interface-kbps[single-flow-kbps]] • Enables RSVP for IP on an interface and specify amount of bandwidth to be reserved

11. Implementing Basic MPLS TE on an Interface ip cef mpls traffic-eng tunnels 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

12. ip unnumbered type number • Enables IP on the interface, and brings it up without a unique IP address Creating a Tunnel router(config)# interface tunnelnumber • Configures atunnel interface router(config-if)# router(config-if)# tunnel destination ip-address • Specifies the destination for the tunnel • The tunnel source command is not needed.

13. Example: Creating a Tunnel Interface ... interface tunnel 0 ip unnumbered loopback 0 tunnel destination 10.1.1.2

14. Creating and Configuring a Traffic Tunnel router(config-if)# tunnel mode mpls traffic-eng • Sets the tunnel encapsulation mode to MPLS TE router(config-if)# tunnel mpls traffic-eng bandwidth bandwidth • Configures the requested bandwidth for the MPLS TE tunnel router(config-if)# tunnel mpls traffic-eng priority setup-priority [hold-priority] • Configures the setup and reservation priority for an MPLS TE tunnel

15. Creating and Configuring a Traffic Tunnel (Cont.) router(config)# ip explicit-path {name word | identifier number} [{enable | disable }] • Enters the subcommand mode for IP explicit paths and createsor modifies the specified path router(cfg-ip-expl-path)# next-address ip-address • Specifies the next IP address in the explicit path router(config-if)# tunnel mpls traffic-eng path-option number {dynamic | explicit {name path-name | path-number}} [lockdown] • Configures the tunnel to use a named IP explicit path or a path dynamically calculated from the TE topology database

16. Deploying Traffic Tunnels with Autoroute router(config-if)# tunnel mpls traffic-eng autoroute announce • Causes the IGP to use the tunnel in its enhanced SPF

17. 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

18. 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