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When troubleshooting LDP operations on the Cisco IOS and IOS XE routers, what is one of the first things that should be verified?
A. if running OSPF as the IGP, ensure that OSPFv3 has been enabled
B. check if the ip cef command has been enabled
C. verify in the running configurations that all of the required LDP interfaces are defined under the mpls ldp command configuration mode
D. verify if there are any access lists that are denying TCP and UDP port 464 packets
Correct Answer: B
A network engineer must make a reservable maximum bandwidth of 75 Mbps on a Cisco ASR 9000 series router. Which configuration satisfies this requirement in Cisco IOS XR?
Correct Answer: C
Which option is the correct definition of the LB on a Cisco router?
A. a table used by switching functions to forward labeled packets
B. a table that holds the next hop for destination prefixes
C. a label-based adjacency table
D. a table that stores remote and local label bindings
Correct Answer: A
Which two values must be specified in a Cisco NBAR configuration? (Choose two.)
A. port number
B. IP precedence
C. neighbor discovery address
E. transport protocol
Correct Answer: AE
Referring to the Cisco IOS XR show command output exhibit, 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.
Correct Answer: CDE
Which method is used to mark traffic matched by class-map MY_CLASS as Expedited Forwarding?
A. set ip dscp cs7
B. set dscp cs7
C. set dscp 46
D. set dscp 45
Correct Answer: C
Which two protocols facilitate label bindings by neighboring routers? (Choose two.)
Correct Answer: BE
Refer to the exhibit.
A network engineer who is working for an ISP wants to override the QoS that comes from the customer. The engineer wants to set a QoS value of 5 for all traffic. What are two reasons why the configuration is not working? (Choose two.)
A. The service-policy command should point to the service policy, not to the class map
B. The set command should reference CoS instead of MPLS EXP bits
C. The service-policy configuration should be set as output
D. The policy-map configuration needs to reference class-map Custom1
E. The number 350 in the xconnect command should appear after the encapsulation type
Correct Answer: AD
Within the service provider core network, which two QoS mechanisms are typically deployed on the P routers? (Choose two.)
B. traffic policing and remarking
D. traffic shaping
E. traffic classification and markings
F. link fragmentation and interleaving
Correct Answer: AC
When a link flaps, an mpls ldp session will also flap. Which feature minimizes traffic loss and provides faster convergence after the link is re-established?
B. MPLS LDP IGP SYNC
C. graceful restart
D. LDP session protection
E. LDP nonstop routing
Correct Answer: D
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