JN0-663 · Question #6
A PE provides VLAN VPLS service to a CE attached with two links. You want to prevent Layer 2 loops and provide link redundancy. Which two actions will accomplish this task? (Choose two.)
The correct answer is A. Place both interfaces in a link aggregation group. D. Configure Spanning Tree Protocol between the PE and the CE. Redundant Links Between CE and PE The slide shows a potential loop situation that can occur when there are multiple links between a CE and the local PE. If CE-A2 is a router operating at Layer 3, then there should be no Layer 2 loop possible. However, if CE-A2 is a Layer 2…
Question
A PE provides VLAN VPLS service to a CE attached with two links. You want to prevent Layer 2 loops and provide link redundancy. Which two actions will accomplish this task? (Choose two.)
Options
- APlace both interfaces in a link aggregation group.
- BConfigure different VLANs on each interface.
- CConfigure all VLANs on both interfaces, on the PE, and on the CE.
- DConfigure Spanning Tree Protocol between the PE and the CE.
How the community answered
(43 responses)- A84% (36)
- B5% (2)
- C12% (5)
Explanation
Redundant Links Between CE and PE The slide shows a potential loop situation that can occur when there are multiple links between a CE and the local PE. If CE-A2 is a router operating at Layer 3, then there should be no Layer 2 loop possible. However, if CE-A2 is a Layer 2 switch then a Layer 2 loop is possible. To prevent Layer 2 data from looping between the CE and PE with redundant links you must configure either a spanning tree protocol between PE and CE, active and backup links on the PE, Ethernet Ring Protection (ERP), or a link aggregation group (LAG).
Topics
Community Discussion
No community discussion yet for this question.