PurposeCommand or Action
4 0
0
IPV4 ROUTES: 3
3 0
0
IPV6 ROUTES: 4
4 0
0
Multiprotocol Label Switching Traffic Engineering
The MPLS TE feature enables an MPLS backbone to replicate and expand the traffic engineering capabilities
of Layer 2 ATM and Frame Relay networks. MPLS is an integration of Layer 2 and Layer 3 technologies.
For IS-IS, MPLS TE automatically establishes and maintains MPLS TE label-switched paths across the
backbone by using Resource Reservation Protocol (RSVP). The route that a label-switched path uses is
determined by the label-switched paths resource requirements and network resources, such as bandwidth.
Available resources are flooded by using special IS-IS TLV extensions in the IS-IS. The label-switched paths
are explicit routes and are referred to as traffic engineering (TE) tunnels.
Configure MPLS Traffic Engineering for IS-IS
This task explains how to configure IS-IS for MPLS TE. This task is optional.
Before you begin
Your network must support the MPLS software feature before you enable MPLS TE for IS-IS on your router.
You must enter the commands in the following task list on every IS-IS router in the traffic-engineered portion
of your network.
Note
MPLS traffic engineering currently does not support routing and signaling of LSPs over unnumbered IP links.
Therefore, do not configure the feature over those links.
Note
SUMMARY STEPS
1. configure
2. router isis instance-id
3. address-family { ipv4 | ipv6 } [ unicast ]
4. mpls traffic-eng level { 1 | 2 }
5. mpls traffic-eng router-id { ip-address | interface-name interface-instance }
6. metric-style wide [ level { 1 | 2 }]
7. commit
8. show isis [ instance instance-id ] mpls traffic-eng tunnel
Routing Configuration Guide for Cisco NCS 5500 Series Routers, IOS XR Release 6.3.x
31
Implementing IS-IS
Multiprotocol Label Switching Traffic Engineering
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