Introduction

This is the minimal configuration required to have MPLS TE operating in one direction. Make sure that another tunnel is created for the reverse direction.

Base Configuration

1. Enable the MPLS Traffic Engineering feature

mpls traffic-eng tunnels

2. Enable MPLS TE per each relevant interface.

int gi3/0
 mpls traffic-eng tunnels

+ show mpls interface

+ show ip rsvp interface

+ show mpls traffic-eng tunnels brief

3. Enable MPLS TE for IGP to distribute the TE topology/information. Make sure that router-id is configured with a /32 or else it won't work.

router ospf 1
 mpls traffic-eng router-id Loopback0
 mpls traffic-eng area 0

+ show ip ospf mpls traffic-eng link

+ show mpls traffic-eng topology brief

- Hide show mpls traffic-eng topology brief

R2#sh mpls traffic-eng topology brief
My_System_id: 2.2.2.2 (ospf 1  area 0)

Signalling error holddown: 10 sec Global Link Generation 21

IGP Id: 2.2.2.2, MPLS TE Id:2.2.2.2 Router Node  (ospf 1  area 0)
      link[0]: Broadcast, DR: 10.1.24.4, nbr_node_id:10, gen:21
      frag_id: 4, Intf Address: 10.1.24.2
      TE metric: 1, IGP metric: 1, attribute flags: 0x0
      SRLGs: None

IGP Id: 4.4.4.4, MPLS TE Id:4.4.4.4 Router Node  (ospf 1  area 0)
      link[0]: Broadcast, DR: 10.1.24.4, nbr_node_id:10, gen:18
      frag_id: 2, Intf Address: 10.1.24.4
      TE metric: 1, IGP metric: 1, attribute flags: 0x0
      SRLGs: None

IGP Id: 8.8.8.8, MPLS TE Id:8.8.8.8 Router Node  (ospf 1  area 0)
      link[0]: Broadcast, DR: 10.1.68.8, nbr_node_id:13, gen:20
      frag_id: 2, Intf Address: 10.1.68.8
      TE metric: 1, IGP metric: 1, attribute flags: 0x0
      SRLGs: None

      link[1]: Broadcast, DR: 10.1.48.4, nbr_node_id:12, gen:20
      frag_id: 3, Intf Address: 10.1.48.8
      TE metric: 1, IGP metric: 1, attribute flags: 0x0
      SRLGs: None

IGP Id: 10.1.23.3, Network Node  (ospf 1  area 0)
      link[0]: Broadcast, Nbr IGP Id: 3.3.3.3, nbr_node_id:4294967295, gen:12

      link[1]: Broadcast, Nbr IGP Id: 2.2.2.2, nbr_node_id:8, gen:12

IGP Id: 10.1.24.4, Network Node  (ospf 1  area 0)
      link[0]: Broadcast, Nbr IGP Id: 4.4.4.4, nbr_node_id:14, gen:13

      link[1]: Broadcast, Nbr IGP Id: 2.2.2.2, nbr_node_id:8, gen:13

IGP Id: 10.1.36.6, Network Node  (ospf 1  area 0)
      link[0]: Broadcast, Nbr IGP Id: 6.6.6.6, nbr_node_id:4294967295, gen:14

      link[1]: Broadcast, Nbr IGP Id: 3.3.3.3, nbr_node_id:4294967295, gen:14

IGP Id: 10.1.48.4, Network Node  (ospf 1  area 0)
      link[0]: Broadcast, Nbr IGP Id: 4.4.4.4, nbr_node_id:4294967295, gen:15

      link[1]: Broadcast, Nbr IGP Id: 8.8.8.8, nbr_node_id:15, gen:15

IGP Id: 10.1.68.8, Network Node  (ospf 1  area 0)
      link[0]: Broadcast, Nbr IGP Id: 8.8.8.8, nbr_node_id:15, gen:16

      link[1]: Broadcast, Nbr IGP Id: 6.6.6.6, nbr_node_id:4294967295, gen:16

+ show mpls traffic-eng topology

- Hide show mpls traffic-eng topology

R2#sh mpls traffic-eng topology
My_System_id: 2.2.2.2 (ospf 1  area 0)

Signalling error holddown: 10 sec Global Link Generation 21

IGP Id: 2.2.2.2, MPLS TE Id:2.2.2.2 Router Node  (ospf 1  area 0)
      link[0]: Broadcast, DR: 10.1.24.4, nbr_node_id:10, gen:21
      frag_id: 4, Intf Address: 10.1.24.2
      TE metric: 1, IGP metric: 1, attribute flags: 0x0
      SRLGs: None
      physical_bw: 1000000 (kbps), max_reservable_bw_global: 0 (kbps)
      max_reservable_bw_sub: 0 (kbps)

                             Global Pool       Sub Pool
           Total Allocated   Reservable        Reservable
           BW (kbps)         BW (kbps)         BW (kbps)
           ---------------   -----------       ----------
    bw[0]:            0                0                0
    bw[1]:            0                0                0
    bw[2]:            0                0                0
    bw[3]:            0                0                0
    bw[4]:            0                0                0
    bw[5]:            0                0                0
    bw[6]:            0                0                0
    bw[7]:            0                0                0

IGP Id: 4.4.4.4, MPLS TE Id:4.4.4.4 Router Node  (ospf 1  area 0)
      link[0]: Broadcast, DR: 10.1.24.4, nbr_node_id:10, gen:18
      frag_id: 2, Intf Address: 10.1.24.4
      TE metric: 1, IGP metric: 1, attribute flags: 0x0
      SRLGs: None
      physical_bw: 1000000 (kbps), max_reservable_bw_global: 0 (kbps)
      max_reservable_bw_sub: 0 (kbps)

                             Global Pool       Sub Pool
           Total Allocated   Reservable        Reservable
           BW (kbps)         BW (kbps)         BW (kbps)
           ---------------   -----------       ----------
    bw[0]:            0                0                0
    bw[1]:            0                0                0
    bw[2]:            0                0                0
    bw[3]:            0                0                0
    bw[4]:            0                0                0
    bw[5]:            0                0                0
    bw[6]:            0                0                0
    bw[7]:            0                0                0

IGP Id: 8.8.8.8, MPLS TE Id:8.8.8.8 Router Node  (ospf 1  area 0)
      link[0]: Broadcast, DR: 10.1.68.8, nbr_node_id:13, gen:20
      frag_id: 2, Intf Address: 10.1.68.8
      TE metric: 1, IGP metric: 1, attribute flags: 0x0
      SRLGs: None
      physical_bw: 1000000 (kbps), max_reservable_bw_global: 0 (kbps)
      max_reservable_bw_sub: 0 (kbps)

                             Global Pool       Sub Pool
           Total Allocated   Reservable        Reservable
           BW (kbps)         BW (kbps)         BW (kbps)
           ---------------   -----------       ----------
    bw[0]:            0                0                0
    bw[1]:            0                0                0
    bw[2]:            0                0                0
    bw[3]:            0                0                0
    bw[4]:            0                0                0
    bw[5]:            0                0                0
    bw[6]:            0                0                0
    bw[7]:            0                0                0

      link[1]: Broadcast, DR: 10.1.48.4, nbr_node_id:12, gen:20
      frag_id: 3, Intf Address: 10.1.48.8
      TE metric: 1, IGP metric: 1, attribute flags: 0x0
      SRLGs: None
      physical_bw: 1000000 (kbps), max_reservable_bw_global: 0 (kbps)
      max_reservable_bw_sub: 0 (kbps)

                             Global Pool       Sub Pool
           Total Allocated   Reservable        Reservable
           BW (kbps)         BW (kbps)         BW (kbps)
           ---------------   -----------       ----------
    bw[0]:            0                0                0
    bw[1]:            0                0                0
    bw[2]:            0                0                0
    bw[3]:            0                0                0
    bw[4]:            0                0                0
    bw[5]:            0                0                0
    bw[6]:            0                0                0
    bw[7]:            0                0                0

IGP Id: 10.1.23.3, Network Node  (ospf 1  area 0)
      link[0]: Broadcast, Nbr IGP Id: 3.3.3.3, nbr_node_id:4294967295, gen:12

      link[1]: Broadcast, Nbr IGP Id: 2.2.2.2, nbr_node_id:8, gen:12

IGP Id: 10.1.24.4, Network Node  (ospf 1  area 0)
      link[0]: Broadcast, Nbr IGP Id: 4.4.4.4, nbr_node_id:14, gen:13

      link[1]: Broadcast, Nbr IGP Id: 2.2.2.2, nbr_node_id:8, gen:13

IGP Id: 10.1.36.6, Network Node  (ospf 1  area 0)
      link[0]: Broadcast, Nbr IGP Id: 6.6.6.6, nbr_node_id:4294967295, gen:14

      link[1]: Broadcast, Nbr IGP Id: 3.3.3.3, nbr_node_id:4294967295, gen:14

IGP Id: 10.1.48.4, Network Node  (ospf 1  area 0)
      link[0]: Broadcast, Nbr IGP Id: 4.4.4.4, nbr_node_id:4294967295, gen:15

      link[1]: Broadcast, Nbr IGP Id: 8.8.8.8, nbr_node_id:15, gen:15

IGP Id: 10.1.68.8, Network Node  (ospf 1  area 0)
      link[0]: Broadcast, Nbr IGP Id: 8.8.8.8, nbr_node_id:15, gen:16

      link[1]: Broadcast, Nbr IGP Id: 6.6.6.6, nbr_node_id:4294967295, gen:16

4. Setup the path options for the tunnel. Most basic setup is to use the dynamic options or define an explicit path.

tunnel mpls traffic-eng path-option 1 explicit name R3R6
tunnel mpls traffic-eng path-option 2 dynamic

ip explicit-path name R3R6 enable
 next-address 10.1.23.3
 next-address 10.1.36.6
 next-address 10.1.68.8

+ show ip explicit-paths name R3R6

5. Route traffic over the tunnel to the PE by advertising routes automatically in IGP.

 tunnel mpls traffic-eng autoroute announce

+ show mpls traffic-eng tunnel tunnel 36

+ show ip cef tunnel36

+ show ip route 8.8.8.8

+ traceroute 9.9.9.9 source loop0

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Introduction

Base Configuration

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