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Traffic engineering is a key use case of SR-MPLS, allowing operators to steer selected traffic flows over non-shortest paths for load balancing or policy reasons. We executed SR-TE traffic steering over the SR-MPLS test by selecting a forwarding path that differed from the IS-IS shortest path. For each run, we rotated the Device Under Test (DUT) through the systems listed in the Table below while keeping the remaining nodes fixed, and we configured a static SR policy on the headend toward the destination using a specific color to steer traffic over the longer path in the SR-MPLS domain. We then advertised the relevant routes with a BGP color extended community so that the headend matched the traffic to the SR-TE policy. With the color present, traffic followed the SR-TE path as intended and did not use the IGP-preferred path. For testing the fallback, we removed the color from the route advertisement and confirmed that the traffic reverted to the normal IGP shortest path. This verified that policy-based steering was applied only when the BGP color matched the SR policy, and that forwarding returned to IGP when the steering signal was withdrawn. |
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[[~[~[Figure 66: SR-MPLS - SR-TE Traffic Steering (per destination)~>~>image:485599745332412417_SRMPLS-06-SRTE-Generic-1-v1.png~|~|alt="Figure 66" width="550"~]~]>>attach:485599745332412417_SRMPLS-06-SRTE-Generic-1-v1.png||target="_blank"]] |
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|=Headend|=Traffic Generator |
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|Arista 7280R3|Keysight IxNetwork |
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|HPE ACX7100-48L|Keysight IxNetwork |
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|Nokia 7730 SXR-1x-44s|Keysight IxNetwork |
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|Nokia 7750 SR-1|Keysight IxNetwork |
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|Rbbn NPT-2507|Keysight IxNetwork |
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|ZTE ZXCTN 6120H-S|Keysight IxNetwork |
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|ZTE ZXR10 M6000-2S16|Keysight IxNetwork |
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|ZTE ZXR10 M6000-4SE|Keysight IxNetwork |
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|Raisecom iTN8800-A|Keysight IxNetwork |
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Table 36: SR-MPLS - SRTE Traffic Steering (per destination) - per destination |
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|[[< Previous>>doc:SR-MPLS Inter AS]]|[[Next ~>>>doc:Liveness of SR Policy using Seamless BFD or Simple TWAMP]] |
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{{include reference="Main.EANTC Transport & Cloud Networks Interop Test Report 2026.Sidebar Nav"/}} |
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