QuestionQ36

VPLS loop avoidance

What must be enabled to prevent a loop inside a LAG?

  • A RSTP
  • B Dynamic-cost
  • C LACP active
  • D Nothing, There are no loops in LAGs
Explanation

A Link Aggregation Group presents its member links as one logical interface, so the member links do not create a Layer 2 forwarding loop within the aggregation. LACP is optional for a LAG and negotiates membership; it is not the mechanism that prevents an internal LAG loop.

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