MPLS TE Configuration

Course Objectives

MPLS TE tunnel configuration TE FRR configuration

Course Outline

MPLS TE Basic Configuration MPLS TE Protection Configuration

Network Topology

R1 R2 R3

10.0.1.0/24 10.0.2.0/24

fei_1/1 fei_1/1 fei_1/2 fei_1/1

.1 .2 .2 .1

Lo1： 1.1.1.1 Lo1： 2.2.2.2 Lo1： 3.3.3.3

To configure a TE tunnel of R1->R2->R3, there are three steps:

1. Enable MPLS TE

2. Enable IGP TE on R1, R2 and R3.

3. Configure a tunnel on head end.

Enable MPLS TE

R1(config)#mpls traffic-eng tunnels //Enable MPLS TE globally. The function is disable

d by default. R1(config)#interface fei_1/1 R1(config-if)#mpls traffic-eng tunnels //Enable MPLS TE on an interface R1(config-if)#ip rsvp bandwidth 50000 20000 //Configure the maximum available bandwidth of tr

affic engineering and LSP, use the following command. The default value is 75% of physical bandwidth.

Enable IGP TE

Here IGP uses OSPF. IS-IS can also be used. R1(config)#router ospf 1 R1(config-router)#mpls traffic-eng area 0 //Configure the area that enables MPLS TE R1(config-router)#mpls traffic-eng router-id loopba

ck1 //Configure Router ID used for TE R1(config-router)#network 1.1.1.1 0.0.0.0 area 0 R1(config-router)#network 10.0.1.1 0.0.0.255 area

0

Enable IGP TE

If IGP uses IS-IS, the related configuration is shown below. R1(config)#router isis R1(config-router)#area 00 R1(config-router)#system-id 0010.0100.1001 R1(config-router)#metric-style wide R1(config-router)#is-type level-1 R1(config-router)#mpls traffic-eng level-1 //Configure the levels that enable MPLS TE R1(config-router)#mpls traffic-eng router-id loopback1 //Configure Router ID used for TE R1(config)#interface fei_1/1 R1(config-if)#ip router isis

Tunnel Head End Configuration

R1(config)#interface tunnel1 R1(config-if)#tunnel mode mpls traffic-eng //Set the tunnel mode as MPLS TE R1(config-if)#ip unnumbered loopback1 //Configure the address of tunnel head end. The tunnel can

use valid IP address of other interface on the router to save IP.

//To configure an IP address for the tunnel, use this command:

R1(config-if)#ip address 1.1.21.1 255.255.255.255 R1(config-if)#tunnel destination ipv4 3.3.3.3 //Configure the address of tunnel tail end

Tunnel Head End Configuration

R1(config-if)#tunnel mpls traffic-eng path-option 1 explicit-path identifier 1

//Use explicit path for tunnel. Several path-options can be configured. The system tries to establish tunnels according to the order.

R1(config-if)# tunnel mpls traffic-eng bandwidth 10000

//Configure available bandwidth

Tunnel Head End Configuration

R1(config)#ip explicit-path identifier 1 next-address 10.0.1.2 strict

R1(config)#ip explicit-path identifier 1 next-address 10.0.2.1 strict

//To use strict explicit path, configure the link must be passed by.

//to use loosen explicit path, the configuration is shown below:

R1(config)#ip explicit-path identifier 1 next-address 2.2.2.2 loose

//It is necessary to configure the node that be passed by in loosen explicit path.

R1(config)#ip explicit-path identifier 1 next-address 3.3.3.3 loose

View Tunnel Information

R1(config)#show mpls traffic-eng interface//View states of interface related to MPLS TEI/F TE Hello interval(ms) misses BK-PATH I/f max(kbps) flo

w max(kbps)fei_1/1 YES NO 100 4 NO 50000 20

000

R1(config)#show mpls traffic-eng tunnels summary//View MPLS TE tunnel summary informationSignalling Summary: LSP Tunnels Process: running RSVP Process: running Forwarding: enabled Head: 1 interfaces, 1 active signalling attempts, 1 established Midpoints: 0, Tails: 0

View Tunnel Information

R1(config-if)#show mpls traffic-eng tunnels brief

//View MPLS TE tunnel brief information

Signalling Summary:

LSP Tunnels Process: running

RSVP Process: running

Forwarding: enabled

TUNNEL NAME DESTINATION UP IF DOWN IF STATE/PROT

tunnel_1 3.3.3.3 — fei_1/1 up/up

View Tunnel Information

R1(config-if)#show mpls traffic-eng tunnels tunnel1

//View detailed information

Name: tunnel_1 (Tunnel1) Destination: 3.3.3.3

Status:

Admin: up Oper: up Path: valid Signalling: connected

Path option: 1, type explicit 1 (Basis for Setup)

Config Parameters:

Bandwidth: 10000 kbps (Global) Priority: 7 7 Affinity: 0x0/0x0

ClassType: 0 Bandwidth: 10000 kbps

Metric Type: IGP (default) Fast-reroute: disable

BFD:disable disconnected down

AutoRoute:disabled AutoRouteMetricType:IGP(default) AutoRouteMetric: 0

InLabel:－ OutLabel:fei_1/1,16

View Tunnel Information

……

RSVP Signalling Info :

src 1.1.1.1 , Dst 3.3.3.3, Tun_Id 1, Tun_Instance 7

RSVP Path Info:

Explicit Route: 10.0.1.1 10.0.1.2 10.0.2.1 10.0.2.2 3.3.3.3

Record Route: NONE

Tspec:ave rate= 10000 kbits, burst= 2000 bytes, peak rate = 10000 kbits

RSVP Resv Info:

Record Route: NONE

Fspec:ave rate= 10000 kbits, burst= 2000 bytes, peak rate = 10000 kbits

……

View Tunnel Information

……

History:

Tunnel:

Time since created: 0 days, 0 hours, 7 minutes

Prior LSP: path option 1 [6]

Current LSP: Uptime:0 days, 0 hours, 0 minutes

Last tunnel down information :

Lsp_id[6] : local tunnel down by administrator[1]

Lsp_id[5] : local tunnel reactive[1]

Lsp_id[0] : none

Induct Traffic to MPLS TE Tunnel

(config)#ip route D.D.D.D X.X.X.X tunnel1 //Use static route forwarding (config)# interface tunnel1 (config-if)# tunnel mpls traffic-eng autoroute annou

nce //Use dynamic route forwarding. Tunnel1 participat

es in SPF calculation as a link

Course Outline

MPLS TE Basic Configuration MPLS TE Protection Configuration

FRR Configuration

R1→R3 is the active LSP. R1→R2→R3 is the standby LSP. When the active tunnel is interrupted, traffics are changed

over to the standby tunnel automatically.

R1 Fei_1/1

10.1.1.1

Fei_1/1

10.1.1.2

Fei_1/2

10.1.2.1Fei_1/2

10.1.3.1

fei_1/1

10.1.2.2fei_1/2

10.1.3.2R2

R3

Lo1:1.1.1.1

Lo1:2.2.2.2

Lo1:3.3.3.3

FRR Configuration

Interface configuration and OSPF/IS-IS related configuration are omitted.

Establish active tunnel:

R1(config)#interface tunnel100

R1(config-if)#tunnel mode mpls traffic-eng

R1(config-if)#tunnel destination ipv4 3.3.3.3

R1(config-if)#tunnel mpls traffic-eng bandwidth 20000

R1(config-if)#tunnel mpls traffic-eng path-option 1 explicit-path identifier 100

R1(config-if)#tunnel mpls traffic-eng fast-reroute

//Enable FRR protection in active tunnel

R1(config-if)#exit

R1(config)#ip explicit-path identifier 100 next-address 10.1.1.2 strict

FRR Configuration

Establish standby LSP tunnel: R1(config)#interface tunnel200 R1(config-if)#tunnel mode mpls traffic-eng R1(config-if)#tunnel destination ipv4 3.3.3.3 R1(config-if)#tunnel mpls traffic-eng bandwidth 20

000 R1(config-if)#tunnel mpls traffic-eng path-option 1

explicit-path name pri R1(config-if)#exit R1(config)#ip explicit-path name pri next-address

10.1.2.2 strict

FRR Configuration

Enable FRR on interface R1(config)#interface fei_1/1 R1(config-if)#mpls traffic-eng backup-path tunnel2

00 R1(config-if)#ip rsvp bfd //Enable BFD to monitor link state for RSVP //RSVP Hello messages can also be used to monit

or link state. R1(config-if)#ip rsvp hello R1(config-if)#exit

View Standby Tunnel State

R1(config)#show mpls traffic-eng fast-rerouteTunnel head end item informationProtected Tunnel In-label Out intf/label FRR intf/label StatusTunnel100 Tun hd fei_1/1:3 Tu200:16 ready

When the link between R1 and R3 is down:R1(config-if)#show mpls traffic-eng fast-rerouteTunnel head end item informationProtected Tunnel In-label Out intf/label FRR intf/label StatusTunnel100 Tun hd fei_1/1:3 Tu200:16 active

ReviewReview

Basic steps to configure MPLS TE

Main steps to configure TE FRR