# MPLS TE DiffServ Aware (DS-TE) Traditional **URL:** https://forum.networklessons.com/t/mpls-te-diffserv-aware-ds-te-traditional/37147 **Category:** Lessons Discussion **Created:** [June 2, 2023, 12:46pm UTC](https://forum.networklessons.com/t/mpls-te-diffserv-aware-ds-te-traditional/37147 "2023-06-02T12:46:45Z") **Posts on this page:** 1 **Showing post:** 5
### Author: ![lagapidis](https://cdn-forum.networklessons.com/user_avatar/forum.networklessons.com/lagapidis/32/4949_2.png) [@lagapidis](https://forum.networklessons.com/u/lagapidis) #### Post date: [August 14, 2025, 5:45am UTC](https://forum.networklessons.com/t/mpls-te-diffserv-aware-ds-te-traditional/37147/5 "2025-08-14T05:45:25Z")
Hello Ratheesh The scenario you refer to deals with DiffServ-aware Traffic Engineering for MPLS, or DS-TE MPLS. This is an enhancement to standard MPLS-TE. In MPLS-TE, you can reserve bandwidth for tunnels but all reservations come from the same single “global” bandwidth pool. This means that high-priority traffic (like voice or video) could be blocked if lower-priority tunnels have already consumed the available TE bandwidth. DS-TE introduces the concept of multiple bandwidth pools, allowing you to create a global pool, as well as sub-pools. You can define multiple class types, wich for different categories of traffic. When this is done, RSVP knows whether it should take bandwidth from the global pool or the sub-pool based on the tunnel’s class-type. Traditional MPLS DS-TE supports only a global pool, **and a single sub-pool**. To achieve what you are describing, you’d need to use MPLS DS-TE IETF mode. you can find out more about that at this lesson here: > **[MPLS TE Diffserv-Aware (DS-TE) IETF Mode](https://networklessons.com/mpls/mpls-te-diffserv-aware-ds-te-ietf-mode)** > > This lesson explains how MPLS TE Diffserv-Aware DS-TE works with MAM and RDM bandwidth constraints models. This mode allows multiple sub-pools as you your scenario, and can support multiple class types as well as bandwidth constraints. I hope this has been helpful! Laz --- _[View the full topic](https://forum.networklessons.com/t/mpls-te-diffserv-aware-ds-te-traditional/37147)._