24 IPUA_626_E1 MPLS TE Configuration 24

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