Dynamic Instantiation and PCC-initiated Paths

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The PCE and PCC-initiated paths cover a large number of use cases for path computation initiation. However, starting the path computation process still requires manual intervention. Dynamic path instantiation allows the network, specifically the PCCs, to automatically trigger a path computation request upon receiving a new route to a destination.

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The test was conducted using the following steps:

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*. Validate the PCEP session between the PCE and the PCC

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*. Advertise a new route to the PCC from an ingress PE, triggering a path request

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*. Computing and signaling a path by the PCE to the PCC

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*. Validate the correct path instantiation on the PCC

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We carried out two iterations using Keysight with IxNetwork as the PCE and H3C with CR16000-M1A as the PCC, along with CR16005E-F, the ingress PE router that advertised the route to the PCC. The first iteration used SR-MPLS, and the second used SRv6 μSID.

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[[Figure 58: Dynamic Path Instantiation over SR-MPLS>>image:432605347874603009_SDN-2_SR-MPLS-1-V1.png||alt="Figure 58" width="550"]]

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[[Figure 59: Dynamic Path Instantiation over SRv6 μSID>>image:432605347908157441_SDN-2_SRv6μSID-2-V1.png||alt="Figure 59" width="550"]]

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|=PCE|=PCC|=Ingress PE