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Home Cisco® 642-889

Cisco® 642-889 Exam Practice Questions (P. 4)

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Question #16
On Cisco IOS and IOS XE Layer 3 MPLS VPN implementations, when redistributing the customer RIP routes into MP-BGP, the RIP metric is copied into which
BGP attribute?
  1. A
    local preference
  2. B
    weight
  3. C
    MED
  4. D
    extended community

Correct Answer:
C

Question #17
Which option is used as a loop prevention mechanism to support MPLS VPN customers with multihomed sites?
  1. A
    BGP down bit
  2. B
    sham links
  3. C
    AS override
  4. D
    SOO extended BGP community
  5. E
    allowas-in

Correct Answer:
D

Question #18
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?
  1. A
    The route distinguisher has not been configured under router bgp 64500 vrf Customer_A.
  2. B
    The import and export route targets have not been configured under router bgp 64500 vrf Customer_A.
  3. C
    The 10.1.1.1 BGP neighbor has not been activated for IPv4 unicast routing.
  4. D
    The 10.1.1.1 BGP neighbor has not been activated for the VPNv4 address family.

Correct Answer:
A

Question #19
Based on the Cisco IOS XR VRF configuration exhibit,
which two data flows between the MPLS VPNs will be allowed? (Choose two.)
  1. A
    The CustomerA central site can communicate with the CustomerB central site.
  2. B
    The CustomerA central site can communicate with all CustomerA sites.
  3. C
    The CustomerA central site can communicate with all CustomerB sites.
  4. D
    The CustomerA sites can communicate with all CustomerB sites.

Correct Answer:
AB

Question #20
Refer to the partial Cisco IOS XR PE router VRF configuration exhibit.

To implement a central-service VPN supporting both customer1 and customer2, what will be the required corresponding VRF configuration on the central-service- server PE router?
  1. A
    vrf central-service-server address-family ipv4 unicast import route-target 3:1 2:2 export route-target 3:1 2:1 !
  2. B
    vrf central-service-server address-family ipv4 unicast import route-target 3:1 2:1 export route-target 3:1 2:2 !
  3. C
    vrf central-service-server address-family ipv4 unicast import route-target 3:1 1:1 1:2 export route-target 3:1 1:1 1:2 !
  4. D
    vrf central-service-server address-family ipv4 unicast import route-target 3:1 1:1 1:2 2:1 2:2 export route-target 3:1 1:1 1:2 2:1 2:2

Correct Answer:
A

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