Alcatel-Lucent Virtual Private LAN Services v7.0
Question 1
Click on the exhibit below.
Based on the output below which of the following statements is true? (Choose 2)
- A. VPLS1500 is a user VPLS.
- B. VPLS 1500 is management VPLS.
- C. Spanning tree BPDUs for the management VPLS are tagged.
- D. Spanning tree BPDUs for the management VPLS are untagged.
Answer : AD
Question 2
If a management VPLS is administratively disabled what will be the status of the associated user VPLS SAPs?
- A. Regular semantics will apply. It will be as if the SAP doesn't belong to a management VPLS.
- B. All user VPLS SAPs will be disabled/pruned.
- C. It is not possible to administratively disable a management VPLS.
- D. Spanning tree will be automatically enabled on the user VPLS SAPs.
Answer : B
Question 3
MC-LAG is only supported on network ports.
- A. TRUE
- B. FALSE
Answer : B
Question 4
Which protocol is used to signal the status of the active links between the PE and the CE in MC-LAG?
- A. MSTP
- B. MCLAG
- C. LACP
- D. DHCP
- E. A proprietary protocol
Answer : C
Question 5
MC-LAG provides link and node protection from an MDU to 3 or more PE devices.
- A. TRUE
- B. FALSE
Answer : B
Question 6
Click on the exhibit below.
The MDU attached to this PE has been configured with active/standby SDP's configuration option has been configured for the PE to recognize that this SDP is in standby mode?
- A. On the PE the endpoint has been configured with "supress-standby-signalling"
- B. On the PE the endpoint has been configured with "no supress-standby-signalling"
- C. On the MDU the endpoint has been configured with "supress-standby-signalling"
- D. On the MDU the endpoint has been configured with "no supress-standby-signalling1
Answer : D
Question 7
In Active/Standby pseudowires a failed pseudowire has recovered. Under what circumstances will the active pseudowire revert to the previously failed link?
- A. It will always revert to the previously failed link.
- B. It will never revert to the previously failed link.
- C. It will revert if the precedence of the previously failed link is set to 0 or "primary".
- D. It will revert if the precedence of the previously failed link is lower than the currently active link
Answer : C
Question 8
Click on the exhibit below.
Assume there are two VPLS services configured on the MDU. How could load-balancing be achieved when using Active/Standby pseudowires?
- A. This cannot be done.
- B. Each VPLS will use the same pair of SDP's with the same endpoint configured with the option "load-balancing 2".
- C. Each VPLS will need their own pair of spoke-SDP's configured. The spoke-sdp's that are to be active should be configured with the option "precedence primary".
- D. Under the end-point configuration, enable load-balancing 2 and the MDU will load balance automatically.
Answer : C
Question 9
Click on the exhibit below.
Assume PE-1 has a mesh-sdp configured to every PE node in both Metro networks. What could be done to prevent the bandwidth replication between Metro 1 and Metro 2?
- A. PE-1 must be configured with mesh-SDPs to every node receiving the multicast traffic. There is no way to reduce the replication or bandwidth.
- B. PE nodes in Metro 1 could be configured with mesh-SDPs. PE nodes in Metro 2 would be configured with mesh-SDPs. However, the connection between Metro networks (PE-2 to PE-6) can be configured with a spoke-sdp. This would reduce the replication and bandwidth used on the link between Metro networks. This also reduces the replication required by PE-1.
- C. PE-1 can be configured with spoke-SDPs to every PE node in both Metro networks. This will reduce the bandwidth and replication within the network.
- D. PE nodes in Metro 1 could be configured with spoke-SDPs. PE nodes in Metro 2 would be configured with spoke-SDPs. However, the connection between Metro networks (PE-2 to PE-6) can be configured with a mesh-sdp. This would reduce the replication and bandwidth used on the link between Metro networks. This also reduces the replication required by PE-1.
Answer : B
Question 10
Why are provisioning requirements a factor that influence VPLS design? (Choose 2)
- A. Adding or removing a node may require several network touches.
- B. Adding or removing a SAP may require several network touches.
- C. Adding or removing a service may require several network touches.
- D. Adding or removing an Epipe may require several network touches.
- E. Provisioning is a factor for all Ethernet services.
Answer : AC
Question 11
What are the advantages of running a physical ring topology with a mesh of mesh-SDPs? (Choose 2)
- 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.
Answer : BD
Question 12
Consider a large metro-to-metro VPLS network interconnected with a mesh of mesh-SDPs. Which of the following statements does NOT apply to this situation?
- A. Bandwidth and replication inefficiency can occur on inter-metro links if there is a lot of multicast traffic
- B. The number of control sessions grows exponentially in a fully meshed network.
- C. Spanning-tree is required to prevent loops when using mesh SDPs on the inter-metro links.
- D. Network touches increase with each node added to the mesh.
Answer : C
Question 13
What scaling factors should a network engineer be aware of when designing VPLS networks? (Choose 3)
- A. Control plane scaling.
- B. Data plane scaling.
- C. Network touches.
- D. Route table reduction.
- E. OAM tools.
Answer : ABC
Question 14
Redundant spoke-SDPs are used between 2 Metro networks for redundancy. How can load balancing be achieved across the redundant spoke-SDPs?
- A. A single management VPLS using RSTP can be used to block different SDPs for different VPLS services.
- B. A single management VPLS using 802.1D-2004 can be used to block different SDPs for different VPLS services
- C. There is no way to have load balancing across redundant spoke-SDPs.
- D. Two management VPLS using RSTP can be used to block different SDPs for different VPLS services.
Answer : D
Question 15
Click on the exhibit below.
How many LSPs are required in total between Metro A and Metro B if 100 hierarchical VPLS services are deployed across the two metro networks?
- A. 100
- B. 200
- C. 1
- D. 2
Answer : D