SR-MPLS - SRTE Traffic Steering (per destination)
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applied only when the BGP color matched the SR policy, and that forwarding returned to IGP when the steering signal was withdrawn.
Figure 66: SR-MPLS - SR-TE Traffic Steering (per destination)
| Headend | Traffic Generator |
|---|---|
| Arista 7280R3 | Keysight IxNetwork |
| HPE ACX7100-48L | Keysight IxNetwork |
| Nokia 7730 SXR-1x-44s | Keysight IxNetwork |
| Nokia 7750 SR-1 | Keysight IxNetwork |
| Rbbn NPT-2507 | Keysight IxNetwork |
| ZTE ZXCTN 6120H-S | Keysight IxNetwork |
| ZTE ZXR10 M6000-2S16 | Keysight IxNetwork |
| ZTE ZXR10 M6000-4SE | Keysight IxNetwork |
| Raisecom iTN8800-A | Keysight IxNetwork |
Table 36: SR-MPLS - SRTE Traffic Steering (per destination) - per destination
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