Valid Cisco 642-889 Exam Questions

Question No. 1

Which three possible misconfigurations can occur on the backbone IGP section of an MPLS Layer 3 VPN setup? (Choose three.)

• A. configuring the LDP router ID with an incorrect loopback interface
• B. configuring the wrong AS number on a client eBGP peering
• C. configuring the wrong area number on a PE-CE OSPF link
• D. decreasing the MPLS MTU
• E. disabling MPLS on a core link
• F. disabling MPLS LDP sync in the IGP routing process

Question No. 2

What is the primary difference between 6PE and 6VPE?

• A. 6VPE does not require an MPLS core.
• B. 6VPE requires an IPv6-aware core.
• C. 6VPE provides IPv6 VPN services.
• D. 6VPE tunnels IPv6 packets inside IPv4 packets.

Question No. 3

Which flavor of MPLS Layer 3 VPN has MPLS enabled on PE-CE links?

• A. basic
• B. CSC
• C. inter-AS
• D. AToM
• E. VPLS

Question No. 4

A. Prefixes that are received with route targets and distinguisher are not accepted.

• B. Prefixes that are received with route targets and distinguisher are accepted.
• C. Prefixes that are received with route targets that are not imported at the PE are not accepted.
• D. Prefixes that are received with route targets that are not imported at the PE are accepted.

Question No. 5

Which option represents an AToM pseudowire basic configuration in Cisco IOS XR device?

• A. pseudowire-class name_class
• B. pseudowire-class name_class
• C. l2vpn pw-class name
• D. l2vpn xconnect group group-name
• E. neighbor ip-address pw-id pseudowire-id

Question No. 6

In MPLS Layer 3 VPN implementations, what is used on the PE router to isolate potential overlapping routing information between different customers?

• A. route targets
• B. VRFs
• C. VC IDs
• D. pseudowire IDs
• E. pseudowire classes