Tag Archives: routers

An engineer must extend Layer 2 Between two campus sites connected through an MPLS backbone that encapsulates Layer 2 and Layer 3 data Which action must the engineer perform on the routers to accomplish this task?

A. Configure a EtherChannel for E-LAN. B. Configure a pseudowire for E-LINE. C. Configure Cisco MPLS TE for use with E-TREE. D. Configure QoS for MPLS and E-ACCESS Answer: Option B. Explanation:  No answer description available for this question Show AnswerDiscussion The post An engineer must extend Layer 2 Between two campus sites connected through an MPLS backbone… Read More »

A network engineer is configuring a newly installed PE router at the regional gateway location. The new PE router must use MPLS core routing protocols with the existing P router, and LDP sessions between the two routers must be protected to provide faster MPLS convergence. Which configuration must the engineer perform on the network so that LDP sessions are established?

A. Enable communication over TCP port 646 for T-LDP hello messages. B. Enable RSVP-TE FRR on the LDP interface to protect the LDP session between routers. C. Enable LDP session protection on either one of the routers, which allows them to autonegotiate. D. Set the LDP session protection timer on each router to the same value. Answer: Option… Read More »

A network engineer is configuring RIP as the routing protocol between multiple PEs and CEs. The engineer must avoid advertising the same routes back to their sources. Which action should be performed on the routers to accomplish this task?

A. Configure a different route distinguisher for each prefix. B. Define the site of origin on each interface. C. Define VRFs on each device to separate the traffic. D. Enable bidirectional forwarding detection on each device. Answer: Option A. Explanation:  No answer description available for this question Show AnswerDiscussion The post A network engineer is configuring RIP as… Read More »

A network operator is attempting to configure an IS-IS adjacency between two routers, but the adjacency cannot be established. To troubleshoot the problem, the operator collects this debugging output. Which interfaces are misconfigured on these routers?

Refer to the exhibit. A network operator is attempting to configure an IS-IS adjacency between two routers, but the adjacency cannot be established. To troubleshoot the problem, the operator collects this debugging output. Which interfaces are misconfigured on these routers? A. The R2 interface is configured as point-to-point, and the peer router interface is configured as multipoint. B.… Read More »

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?

A. Configure a targeted neighbor session. B. Configure an access list on the interface to permit TCP and UDP traffic. C. Configure a Cisco MPLS TE tunnel on both ends of the session. D. Configure the interface bandwidth to handle TCP and UDP traffic between the LDP peers. Answer: Option A. Explanation:  https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/mp_ldp/configuration/12-4m/mp-ldp-12-4m-book.pdf Show AnswerDiscussion The post An… Read More »

Router 1 and router 2 are running OSPF Area 0. The router logs on both routers show that the LDP link has flapped. Which configuration must the engineer apply to the two routers to implement session protection on the link?

Refer to the exhibit. Router 1 and router 2 are running OSPF Area 0. The router logs on both routers show that the LDP link has flapped. Which configuration must the engineer apply to the two routers to implement session protection on the link? A. Router 1(config)# ip cef distributed Router 1(config)# mpls ldp session protection global Router… Read More »

Which two topology changes happen to the IS-IS routers? (Choose two.)

Refer to the exhibit. Which two topology changes happen to the IS-IS routers? (Choose two.) A. R1 and R4 are Level 2 neighbors B. All four routers are operating as Level 1-2 routers C. All four routers are operating as Level 2 routers only D. R1 and R2 are Level 2 neighbors E. All four routers are operating… Read More »

An engineer configured R6 as the headend LSR of an RSVP-TE LSP to router XR2, with the dynamic path signaled as R6-R2-R5-XR2. and set the OSPF cost of all links to 1. MPLS autotunnel backup Is enabled on all routers to protect the LSP. Which two NNHOP backup tunnels should the engineer use to complete the implementation? (Choose two.)

Refer to the exhibit. An engineer configured R6 as the headend LSR of an RSVP-TE LSP to router XR2, with the dynamic path signaled as R6-R2-R5-XR2. and set the OSPF cost of all links to 1. MPLS autotunnel backup Is enabled on all routers to protect the LSP. Which two NNHOP backup tunnels should the engineer use to… Read More »

an engineer working for a private telecommunication company with an employee Id: 4065:96:080 upgrades the WAN link between routers ASBR-101 and ASBR-201 to 1Gb by Installing a new physical connection between the Gi3 Interfaces. Which BGP attribute must the engineer configure on ASBR-201 so that the existing WAN link on Gi2 Is maintained as a backup?

Refer to the exhibit an engineer working for a private telecommunication company with an employee Id: 4065:96:080 upgrades the WAN link between routers ASBR-101 and ASBR-201 to 1Gb by Installing a new physical connection between the Gi3 Interfaces. Which BGP attribute must the engineer configure on ASBR-201 so that the existing WAN link on Gi2 Is maintained as… Read More »

EIGRP is running across the core to exchange internal routes, and each router maintains iBGP adjacency with the other routers on the network. An operator has configured static routes on the edge routers R1 and R2 for IP address 10.0.1.1, which is used as a black hole route as shown. Which configuration should the operator implement to the management router to create a route map that will redistribute tagged static routes into BGP and create a static route to blackhole traffic with tag 777 that is destined to the server at 192.168.10.100?

router(config)# route-map blackhole-trigger router(config-route-map)# match tag 777 router(config-route-map)# set ip next-hop 10.0.1.1 router(config-route-map)# set origin igp router{config-route-map)# set community no-export Refer to the exhibit. EIGRP is running across the core to exchange internal routes, and each router maintains iBGP adjacency with the other routers on the network. An operator has configured static routes on the edge routers R1… Read More »