MPLS TE introduction

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Multiprotocol Label Switching (MPLS) traffic engineering (TE) effectively schedules, allocates, and uses existing network resources to provide sufficient bandwidth and support the quality of service (QoS) for network traffic. MPLS TE helps carriers minimize expenditures without a hardware upgrade. TE that is implemented based on MPLS techniques is easy to deploy and maintain on live networks. MPLS TE supports various reliability techniques, which helps backbone networks achieve carrier- and device-class reliability.

Other related questions:
Does an AR support MPLS TE
Support for MPLS TE: - The AR120&AR150&AR160&AR200&AR500&AR510 do not support MPLS TE. - The AR120-S&AR150-S&AR160-S&AR200-S do not support MPLS TE. Other -S models support MPLS TE starting from V200R005C10. - The AR530 and AR550 do not support MPLS TE. - Other models support MPLS TE starting from V200R002C01.

How to configure MPLS TE on S series switches
Multiprotocol Label Switching Traffic engineering (MPLS TE) can prevent congestion caused by improper resource allocation by allocating some traffic to idle links, allowing network traffic to be allocated properly. The MPLS TE configurations on different switch models are the same. For details, see "CLI-based Configuration > Configuration Guide - MPLS > MPLS TE Configuration" in S7700&S9700 V200R010C00 Product Documentation.

How are RSVP-TE path messages forwarded on the MPLS network
Generally, RSVP-TE Path messages are forwarded on the MPLS network using IP routes. In the scenario where the primary CR-LSP is faulty (that is, the primary CR-LSP is in FRR in-use state) and the TE FRR bypass tunnel is used, RSVP-TE Path messages are forwarded over the TE tunnel.

How to check the path of an MPLS TE tunnel on S series switches
For S series switches (except the S1700), run the display mpls te tunnel path command to check the path of an MPLS TE tunnel after the mpls te record-route label command is configured in the tunnel view. display mpls te tunnel path Tunnel Interface Name : Tunnel6/0/0 Lsp ID : 23.23.23.23 :2 Hop Information Hop 0 3.23.24.1 Hop 1 3.23.24.2 Label 1024 Hop 2 2.2.2.2

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