Cisco 642-889 Exam Questions

Question 6 of 122

In MPLS Layer 3 VPN implementations, which mechanism is used to control which routes are imported to a VRF?

VC ID

PW ID E.

Correct Answer: A

Question 7 of 122

Which two statements regarding Cisco 6PE operations are correct? (Choose two.)

The top label in the label stack is assigned by MP-BGP, and it is used to reach the egress PE.

The inner label in the label stack is assigned by MP-BGP, and it is used for IPv6 forwarding at the egress PE.

The top label in the label stack is assigned by LDP, and it is used to reach the egress PE. D.

Correct Answer: B, C

Question 8 of 122

Which Cisco IOS XR BGP configuration command is required to enable MP-BGP to carry IPv6 VPN routes?

address-family ipv4 unicast

address-family ipv6 unicast

address-family vpnv4 unicast D.

Correct Answer: C

Question 9 of 122

Which statement regarding the Cisco IOS BGP configuration exhibit is correct?
Exam 642-889: Question 9 - Image 1

None of the routers will receive IPv4 BGP routes.

Only the 172.16.2.1 and 172.16.3.1 neighbors will receive both VPNv4 routes and IPv4 BGP routes.

Only the 172.16.3.1 neighbor will receive both VPNv4 routes and IPv4 BGP routes.

All three neighbors (172.16.1.1, 172.16.2.1, and 172.16.3.1) will receive both VPNv4 routes and IPv4 BGP routes. E.

Correct Answer: C

Question 10 of 122

When implementing MPLS Layer 3 VPNs with customers running OSPF as the CE-PE routing protocol, the service provider MPLS backbone looks like what to the
CE routers?

the backbone (Area 0)

an external routing domain

a superbackbone that is transparent to the CE OSPF routers D.

Correct Answer: C