QuestionQ9

IS-IS Routing Protocol

Which of these statements about IS-IS Traffic Engineering on a Nokia 7750 SR is false?

  • A Traffic engineering information is carried in the extended TLVs.
  • B Traffic engineering must be enabled on all IP/MPLS routers along the LSP path.
  • C Traffic engineering information is stored in the opaque database.
  • D Traffic engineering is required for constraint-based LSPs
Explanation

IS-IS Traffic Engineering distributes TE attributes through IS-IS LSPs using extended reachability TLVs and sub-TLVs, and CSPF applies those attributes from the TE database when computing constrained LSP paths. An opaque database is associated with OSPF opaque-LSA mechanisms, not IS-IS TE.

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