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QUESTION: 169 Exam Topics:

Refer to the exhibit. An engineer began to configure LDP between R1 and R2, but R1 and R2 cannot yet establish an LDP TCP connection. Which additional task must be completed to finish the implementation?

Configure the mpls ldp neighbor 10.0.12.1 password command on R1
Configure the mpls ldp neighbor 172.16.0.1 password command on R1
Configure the no mpls ldp password option 1 command on R1
Configure the no mpls ldp password option 1 command on R2

Answer(s): D

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QUESTION: 170 Exam Topics:

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After implementing MPLS protocol for multiple VRFs on a single Cisco device, the engineer notices all VRFs on the router still do not have the LDP session protection feature enabled. Which configuration must the engineer apply to enable the LDP session protection feature for LDP neighbors within each VRF?

Configure LDP session protection globally on the device only.
Configure LDP session protection within the individual VRFs.
Configure LDP session authentication on the device to enable LDP session protection on each VRF automatically.
Configure LDP session protection globally on the device and on each neighbor that requires session protection.

Answer(s): A

Reference:

https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/mp_ldp/configuration/xe-16-5/mp-ldp-xe-16-5- book/mp-ldp-sessn-prot.html

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QUESTION: 171 Exam Topics:

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What is a constraint of Cisco MPLS TE tunnel configurations?

QoS-aware tunneling is not supported.
Tunnels cannot be configured over IP unnumbered links.
With ISIS as an IGP, only older-style metrics are used.
Tunnels cannot span multiple OSPF areas.

Answer(s): B

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QUESTION: 172 Exam Topics:

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An engineer is implementing MPLS OAM to monitor traffic within the MPLS domain. Which action must the engineer perform to prevent packets from being forwarded beyond the service provider domain when the LSP is down?

Configure a private IP address as the destination address of the headend router of Cisco MPLS TE.
Disable IP redirects only on outbound interfaces.
Disable IP redirects on all ingress interfaces.
Implement the destination address for the LSP echo request packet in the 127.x.y.z/8 network.

Answer(s): D

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QUESTION: 173 Exam Topics:

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A network engineer has configured TE tunnels in the MPLS provider core. Which two steps ensure traffic traverse? (Choose two.)

ECMP between tunnels allows RSVP to function correctly.
The IGP metric of a tunnel is configured to prefer a certain path.
A tunnel weight is configured in SPF database the same way as a native link.
Static route is the only option for directing traffic into a tunnel.
Forwarding adjacency feature allows a tunnel to be installed in the IGP table as a link.

Answer(s): B,E

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QUESTION: 174 Exam Topics:

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An engineer is implementing a Cisco MPLS TE tunnel to improve the streaming experience for the clients of a video-on-demand server. Which action must the engineer perform to configure extended discovery to support the MPLS LDP session between the headend and tailend routers?

Configure a targeted neighbor session.
Configure an access list on the interface to permit TCP and UDP traffic.
Configure a Cisco MPLS TE tunnel on both ends of the session.
Configure the interface bandwidth to handle TCP and UDP traffic between the LDP peers.

Answer(s): A

Reference:

https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/mp_ldp/configuration/12-4m/mp-ldp-12-4m- book.pdf

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QUESTION: 175 Exam Topics:

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An engineer implemented LDP protocol on the ISP network. The engineer must ensure that there are no packet loss issues when IGP and LDP protocols are not synchronized. Which configuration must the engineer implement so that the IGP routing protocol will wait until LDP convergence is completed?