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4A0-105 · Question #120

How does PBB forward broadcast, unknown-unicast and multicast traffic from a B-VPLS to an l- VPLS?

The correct answer is D. The receiving PE checks the multicast B-DA to see if an l-SID has been mapped to the B-DA that. See the full explanation below for the reasoning.

Question

How does PBB forward broadcast, unknown-unicast and multicast traffic from a B-VPLS to an l- VPLS?

Options

  • AThe receiving PE checks the l-TAG in the l-SID to determine if there is a local l-VPLS on the
  • BThe receiving PE checks the l-SID in the l-TAG to determine if there is a local l-VPLS on the
  • CThe receiving PE checks the service label in the mpls header to determine if there is a local l-
  • DThe receiving PE checks the multicast B-DA to see if an l-SID has been mapped to the B-DA that

How the community answered

(57 responses)
  • A
    4% (2)
  • B
    7% (4)
  • C
    14% (8)
  • D
    75% (43)

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