4A0-105: Nokia Virtual Private LAN ServicesDemo

By Nokia · Question Mode

QuestionQ48

VPLS redundancy techniques

Which of the following is a key benefit of Active/Standby pseudowires?

  • A The MDU does not need to support MPLS.
  • B Can be used in ring networks of 4 or more nodes
  • C Does not require the use of a layer 2 loop prevention protocol such as RSTP
  • D The MDU does not have to be aware of the active/standby configuration
Explanation

Active/standby pseudowires permit only the active pseudowire to forward traffic, while the standby path is held inactive until it is needed for failover. This prevents a Layer 2 forwarding loop between the redundant paths, eliminating the need for a Layer 2 loop-prevention protocol such as RSTP.

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