Mpls Te Auto-Tunnel Mesh One-Hop; Inter-Area Traffic Engineering With Dynamic Abr Discovery; How To Implement Traffic Engineering; Building Mpls-Te Topology - Cisco CRS Configuration Manual

Implementing MPLS Traffic Engineering

MPLS TE Auto-tunnel Mesh One-hop

The MPLS TE Auto-tunnel primary one-hop feature allows automatic creation of tunnels over TE enabled
interfaces to next hop neighbors. The Auto-tunnel primary one-hop is configurable under the MPLS TE
Auto-tunnel mesh group mode and for each mesh group. The Auto-tunnel primary one-hop configuration
automatically creates one-hop tunnels to next hop neighbors. A router that becomes a next hop neighbor will
have a set of one-hop tunnels created automatically.

Inter-area Traffic Engineering with Dynamic ABR Discovery

The inter-area traffic engineering with dynamic ABR discovery feature adds support for inter-area point-to-point
(P2P) and point-to-multi-point (P2MP) traffic engineering with dynamic ABR discovery. With this feature,
there is no need to specify transit ABR addresses in the explicit paths to allow for dynamic/best path
computation for inter-area tunnels.

How to Implement Traffic Engineering

Traffic engineering requires coordination among several global neighbor routers, creating traffic engineering
tunnels, setting up forwarding across traffic engineering tunnels, setting up FRR, and creating differential
service.
These procedures are used to implement MPLS-TE:

Building MPLS-TE Topology

Perform this task to configure MPLS-TE topology (required for traffic engineering tunnel operations).
Before You Begin
Before you start to build the MPLS-TE topology, you must have enabled:
• IGP such as OSPF or IS-IS for MPLS-TE.
• MPLS Label Distribution Protocol (LDP).
• RSVP on the port interface.
• Stable router ID is required at either end of the link to ensure that the link is successful. If you do not
• If you are going to use nondefault holdtime or intervals, you must decide the values to which they are
assign a router ID, the system defaults to the global router ID. Default router IDs are subject to change,
which can result in an unstable link.
set.
Cisco IOS XR MPLS Configuration Guide for the Cisco CRS Router, Release 5.1.x
MPLS TE Auto-tunnel Mesh One-hop
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