Cisco 642-887 - Implementing Cisco Service Provider Next-Generation Core Network Services Exam
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Total 130 questions
Question #11 (Topic: )
Refer to the Cisco IOS XR configuration exhibit.
[Cisco-642-887-7.0/Cisco-642-887-9_2.png]
Which statement is correct?
[Cisco-642-887-7.0/Cisco-642-887-9_2.png]
Which statement is correct?
A. The backup tunnel-te 10 tunnel is using the highest setup and hold priority settings of 7.
B. The backup tunnel path is learned dynamically.
C. The fast-reroute command is missing under the (config-mpls-te-if)# configuration mode.
D. Interface gi0/0/0/10 is the protected link.
Answer: D
Question #12 (Topic: )
Which three commands are used to troubleshoot why IP packets are not forwarded on the
LSP? (Choose three.)
LSP? (Choose three.)
A. show cef prefix/length to check the prefix information
B. debug mpls ldp transport events to display events related to the LDP peer discovery mechanism
C. show mpls forwarding labels <label-id> hardware egress location <node-id> to check the hardware label FIB
D. show arp <prefix> location <node-id> for the next hop prefix
E. show mpls ldp discovery for the corresponding label information
F. debug mpls ea platform all to display MPLS setup events and errors
Answer: A,C,D
Question #13 (Topic: )
Which protocol is used to send MPLS OAM traffic over an MPLS network?
A. ICMP
B. IP protocol number 137
C. TCP
D. UDP
Answer: D
Question #14 (Topic: )
With unmanaged CE routers, at which point in the service provider network is the QoS trust
boundary, and what is required at the trust boundary?
boundary, and what is required at the trust boundary?
A. between the CE and PE router and mapping of the customer traffic classes into the service provider traffic classes at the PE router ingress
B. between the CE and PE router and trusting the QoS markings from the CE router and applying the required QoS mechanisms based on the customer QoS markings
C. between the PE and the P router and mapping of the customer traffic classes into the service provider traffic classes at the P router ingress
D. between the PE and P router and trusting the QoS markings from the CE router and applying the required QoS mechanisms based on the customer QoS markings
E. between the customer network and the CE router ingress and applying the required egress QoS policy on the CE router
Answer: A
Question #15 (Topic: )
On the Cisco IOS XR, which MQC configuration is different than on the Cisco IOS and IOS
XE?
XE?
A. On the Cisco IOS XR, WRED can only be applied in the output direction.
B. On the Cisco IOS XR, marking can only be applied in the input direction.
C. On the Cisco IOS XR, LLQ can be applied in the input or output direction.
D. On the Cisco IOS XR, LLQ can use up to four priority queues: level 1, level 2, level 3, and level 4.
Answer: C
