4A0-105: Nokia Virtual Private LAN ServicesDemo

By Nokia · Question Mode

QuestionQ96

VPLS loop avoidance

Which Spanning Tree protocol is used by default in a VPLS on the Alcatel-Lucent 7750 SR?

  • A 802.1D2004
  • B 802.1D 1998
  • C comp-dot1w
  • D PVST
Explanation

The default VPLS Spanning Tree mode is RSTP, which is compliant with IEEE 802.1D-2004. The comp-dot1w mode is intended for compatibility with older IEEE 802.1w implementations, while IEEE 802.1D-1998 may be used only after detection of a different BPDU format.

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