Cisco 642-887 - Implementing Cisco Service Provider Next-Generation Core Network Services Exam
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Total 130 questions
Question #1 (Topic: )
Which Cisco IOS XR command should be used in order to enable LDP-IGP
synchronization for the ISIS IGP protocol?
synchronization for the ISIS IGP protocol?
A. RP/0/RSP0/CPU0:R1(config-isis-if-af)#mpls ldp sync
B. RP/0/RSP0/CPU0:R1(config-isis)#mpls ldp sync
C. RP/0/RSP0/CPU0:R1(config-ldp)#isis ldp sync
D. LDP-IGP synchronization is not supported for the ISIS IGP protocol on Cisco IOS XR platforms
Answer: A
Question #2 (Topic: )
Scenario:
[Cisco-642-887-7.0/Cisco-642-887-2_2.png]
[Cisco-642-887-7.0/Cisco-642-887-3_2.png]
[Cisco-642-887-7.0/Cisco-642-887-3_3.png]
[Cisco-642-887-7.0/Cisco-642-887-4_2.png]
On P2IOS-XR router what is targeted LDP hellos hold time on LDP session with 10.0.1.1:0
LDP ID?
[Cisco-642-887-7.0/Cisco-642-887-2_2.png]
[Cisco-642-887-7.0/Cisco-642-887-3_2.png]
[Cisco-642-887-7.0/Cisco-642-887-3_3.png]
[Cisco-642-887-7.0/Cisco-642-887-4_2.png]
On P2IOS-XR router what is targeted LDP hellos hold time on LDP session with 10.0.1.1:0
LDP ID?
A. 90 sec
B. 10 sec
C. 3 sec
D. 8.6 sec
Answer: A
Question #3 (Topic: )
How many labels does an MPLS packet have, with a bottom-of-stack label set to zero?
A. The packet has no label.
B. The packet has one label.
C. The packet may have one or more labels.
D. The packet has at least two labels.
Answer: D
Question #4 (Topic: )
Which statement describes the QoS behavior between P and PE routers of an MPLS
provider network for an L3VPN service?
provider network for an L3VPN service?
A. The PE function honors DSCP markings set by the CE.
B. The customer and provider must agree on DSCP classification and traffic priorities.
C. Classification of customer traffic is handled by the P router.
D. The PE function cannot map DSCP markings to MPLS EXP bits.
Answer: B
Question #5 (Topic: )
Referring to the Cisco IOS XR show command output exhibit,
[Cisco-642-887-7.0/Cisco-642-887-5_2.png]
what are three possible reasons that the GigabitEthernet0/1/0/10 LDP IGP sync status is
not ready? (Choose three.)
[Cisco-642-887-7.0/Cisco-642-887-5_2.png]
what are three possible reasons that the GigabitEthernet0/1/0/10 LDP IGP sync status is
not ready? (Choose three.)
A. GigabitEthernet0/1/0/10 is not configured to run LDP.
B. Graceful restart is not configured on the peer.
C. The LDP neighbor on GigabitEthernet0/1/0/10 is not up.
D. The OSPF neighbor on GigabitEthernet0/1/0/10 is not up.
E. LDP is up on GigabitEthernet0/1/0/10, but no label bindings have been received from the peer.
F. GigabitEthernet0/1/0/10 is a member link of Bundle-Ether9000.
Answer: C,D,E
