H12-821: HCIP-Datacom-Core TechnologyDemo

By Huawei · Question Mode

QuestionQ12

Huawei Cloud O&M Solution

In an IS-IS network, every router can generate LSPs. Which of these events causes a new LSP to be generated?

Choose four
  • A Related IS-IS interfaces go up or down.
  • B Periodic updates occur.
  • C Inter-area IP routes change.
  • D The IS-IS interface cost is increased.
Explanation

IS-IS creates a newer LSP version whenever its advertised topology, metric, or reachable-prefix information changes, including interface state changes, interface-metric changes, and inter-area IP reachability changes. It also periodically refreshes its own LSPs before their maximum lifetime expires, producing new versions even without a topology change.

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