QuestionQ63

VPLS Features

The discard-unknown command is enabled at the VPLS level. Which of the following statements are true?

Choose two
  • A Broadcast traffic will be flooded.
  • B If the unicastSA has not been learned in the FDB, the frame will be dropped.
  • C If the unicast DA has not been learned in the FDB, the frame will be dropped.
  • D All traffic will be dropped, including multicast and broadcast.
  • E Broadcast traffic will be dropped.
Explanation

At the VPLS level, discard-unknown drops packets with an unknown destination MAC address rather than flooding them. Broadcast frames are not unknown-unicast frames and continue to be flooded.

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