Online Access Free 642-889 Exam Questions

Refer to the partial Cisco IOS XR PE router configuration exhibit for supporting a Layer 3 MPLS VPN customer using BGP as the CE-to-PE routing protocol.

The service provider AS number is 64500, the customer AS number is 64501, and the customer CE router is 10.1.1.1. What is missing in the configuration?

• A.The 10.1.1.1 BGP neighbor has not been activated for the VPNv4 address family.
• B.The import and export route targets have not been configured under router bgp 64500 vrf Customer_A.
• C.The 10.1.1.1 BGP neighbor has not been activated for IPv4 unicast routing.
• D.The route distinguisher has not been configured under router bgp 64500 vrf Customer_A.

Refer to the exhibit.

What is the AS-PATH list for an e-BGP update sent from ABC site 1 to ABC site 2 on the CE2 BGP table?

• A.300 6500
• B.6500 300
• C.6500 6500 200
• D.300 300
• E.6500 6500

Refer to the exhibit.

If R1 is operating in an Cisco IOS XR environment, which task must you perform to complete the VPLS configuration?

• A.Enter the exit command at the end of the loopback 0 configuration.
• B.Verify that other devices can reach the loopback interface.
• C.Change the bridge group number to match the loopback interface number
• D.Enter the commit command to save the configuration.

A network engineer working for a very large financial institution must migrate the legacy Frame Relay and ATM virtual circuits over a MPLS VPN solution. Which option is a benefit in choosing a MPLS Layer 3 VPN versus any other Layer 2 VPN design?

• A.An MPLS Layer 3 VPN design offers better scalability for large organizations.
• B.An MPLS Layer 3 VPN solution provides the possibility to implement overlapping IP addressing.
• C.An MPLS Layer 3 VPN design requires less provider edge router configuration than any other Layer 2 VPN implementation.
• D.An MPLS Layer 3 VPN design requires less customer edge router configuration than any other Layer 2 VPN implementation.

Which three Layer 3 VPN technologies are based on the overlay model? (Choose three.)

• A.L2TPv3
• B.MPLS Layer 3 VPNs
• C.Frame Relay virtual circuits
• D.GRE/IPsec
• E.DMVPNs
• F.ATM virtual circuits