Variable Part (n bytes)

PDU Part: Variable Part

Field: -

Length: n bytes

Contents: variable parameters depending on PDU type.

Length and contents of the variable part depend on the current PDU type.

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IS-IS / Level-1/Level-2 LAN IS-IS Hello

IS-IS / Point-to-point IS-IS Hello

IS-IS / Level-1 Link State

IS-IS / Level-2 Link State

IS-IS / Level-1/2 Complete Sequence Numbers

IS-IS / Level-1/2 Partial Sequence Numbers