Understanding SR-MPLS TE (Segment Routing MPLS Traffic Engineering)
????What is SR-MPLS TE?
Segment Routing (SR) replaces traditional MPLS LDP/RSVP-TE signaling.
UsesSR-TE policiesto define network pathswithout requiring per-flow state on intermediate routers.
????How is the SR-MPLS TE Path Calculated?
✅By the SDN Controller (Centralized Path Computation)
The controller (e.g.,Huawei iMaster NCE) calculates theoptimal SR pathbased on:
Bandwidth requirements
Latency constraints
Traffic policies
The controllerthen delivers the SR policy to the ingress router.
✅By the Ingress Router (Distributed Path Computation)
Theingress routercomputes theSR path dynamicallybased onlocal constraints.
This method is usefulwhen no centralized controller is available.
Why is the Answer TRUE?
✅Both centralized (controller-based) and distributed (ingress router-based) path computation are supported in SR-MPLS TE.
Real-World Application:
5G and Cloud WANs:Centralized path optimizationreduces congestion dynamically.
Enterprise Networks:Local path computation ensuresfast rerouting in case of failures.
✅Reference:Huawei HCIE-Datacom Guide – SR-MPLS TE and Path Computation Methods
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