MPLS TE Autoroute Destination – Network Professional Member Site

MPLS Traffic Engineering (TE) autoroute destination automatically installs a static route for your TE tunnel’s destination (tailend router). This saves you the hassle of manually configuring a static route.

Configuration

Let’s try this out. This is the topology we’ll use:

Routers PE1, P1, P2, P3, and PE2 run MPLS TE. We have a TE tunnel where PE1 is the headend and PE2 is the tailend router. I use Cisco IOS XE Software, Version 17.03.04a.

Configurations
CE1
CE2
P1
P2
P3
PE1
PE2

Want to take a look for yourself? Here you will find the startup configuration of each device.

Let’s check the tunnel:

PE1#show mpls traffic-eng tunnels Tunnel 1

Name: PE1_t1                              (Tunnel1) Destination: 6.6.6.6
  Status:
    Admin: up         Oper: up     Path: valid       Signalling: connected
    path option 1, type dynamic (Basis for Setup, path weight 20)

  Config Parameters:
    Bandwidth: 750      kbps (Global)  Priority: 7  7   Affinity: 0x0/0xFFFF
    Metric Type: TE (default)
    Path-selection Tiebreaker:
      Global: not set   Tunnel Specific: not set   Effective: min-fill (default)
    Hop Limit: disabled
    Cost Limit: disabled
    Path-invalidation timeout: 10000 msec (default), Action: Tear
    AutoRoute: disabled LockDown: disabled Loadshare: 750 [2666666] bw-based
    AutoRoute destination: enabled 
    auto-bw: disabled
    Fault-OAM: disabled, Wrap-Protection: disabled, Wrap-Capable: No
  Active Path Option Parameters:
    State: dynamic path option 1 is active
    BandwidthOverride: disabled  LockDown: disabled  Verbatim: disabled
  Node Hop Count: 2

  InLabel  :  -
  OutLabel : GigabitEthernet2, 16
  Next Hop : 192.168.23.3
  RSVP Signalling Info:
       Src 2.2.2.2, Dst 6.6.6.6, Tun_Id 1, Tun_Instance 20
    RSVP Path Info:
      My Address: 192.168.23.2   
      Explicit Route: 192.168.23.3 192.168.36.3 192.168.36.6 6.6.6.6 
      Record   Route:   NONE
      Tspec: ave rate=750 kbits, burst=1000 bytes, peak rate=750 kbits
    RSVP Resv Info:
      Record   Route:   NONE
      Fspec: ave rate=750 kbits, burst=1000 bytes, peak rate=750 kbits
  Shortest Unconstrained Path Info:
    Path Weight: 20 (TE)
    Explicit Route: 192.168.23.2 192.168.23.3 192.168.36.3 192.168.36.6 
                    6.6.6.6 

  History:
    Tunnel:
      Time since created: 14 minutes, 19 seconds
      Time since path change: 10 minutes, 25 seconds
      Number of LSP IDs (Tun_Instances) used: 20
    Current LSP: [ID: 20]
      Uptime: 10 minutes, 25 seconds

Unit 1: Introduction
- Introduction to MPLS
- MPLS Labels and Devices
Unit 2: LDP (Label Distribution Protocol)
- MPLS LDP (Label Distribution Protocol)
- MPLS LDP Label Filtering
Unit 3: MPLS VPN
Unit 4: MPLS L2 Encapsulation
- AToM (Any Transport over MPLS)
Unit 5: IPv6 MPLS
- IPv6 over MPLS 6PE/6VPE
Unit 6: MPLS Traffic Engineering (TE)