4A0-105: Nokia Virtual Private LAN ServicesDemo

Question

What are the benefits of using a physical ring topology with a mesh of mesh-SDPs?

Choose two

A STP can be used to break the loop.
B STP is not required to break the loop because of split-horizon rules.
C If the traffic is primarily multicast, a full mesh of SDPs is a simple and efficient design.
D If the traffic is primarily Unicast, a full mesh of SDPs is a simple and efficient design.

Explanation

VPLS mesh-SDP split-horizon forwarding prevents traffic received on a mesh SDP from being sent to other mesh SDPs in the same service, so no loop-detection protocol such as STP is needed in the fully meshed core. A full mesh also gives each PE direct connectivity to every other PE, which is simple and efficient when traffic is primarily unicast. Multicast instead requires replication toward multiple mesh peers and is less efficient on shared physical-ring links.

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4A0-105: Nokia Virtual Private LAN ServicesDemo

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