4A0-116: Nokia Segment Routing ExamDemo

By Nokia · Question Mode

QuestionQ11

Flexible algorithms (flex-algo)

Which of the following is NOT a valid way to steer traffic into a Flex-Algo segment-routing tunnel?

  • A Using a flex-algo Node-SID as an explicit hop in the path definition of an SR-TE LSP and enabling the sr-te tunnel type for a VPN service.
  • B Specifying the flex-algo instance ID as an additional TE constraint for an SR-TE LSP and enabling the sr-te tunnel type for a VPN service.
  • C Configuring and applying a VRF import policy to a VPRN service and enabling the sr-is-is or sr-ospf tunnel type for the service, depending on the underlying routing protocol.
  • D Configuring and applying a VSI import policy to an EVPN service and enabling the sr-is-is or sr-ospf tunnel type for the service, depending on the underlying routing protocol.
Explanation

A Flex-Algo ID identifies an IGP flexible-algorithm topology and its associated Prefix Node-SIDs; it is not an SR-TE LSP TE constraint. SR-TE paths can instead include Flex-Algo Prefix Node-SIDs in their segment lists, while Flex-Algo-aware import policies can select matching IGP segment-routing tunnels for service next-hop resolution.

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