Implementing Cisco Service Provider Advanced Routing Solutions

Question 1

Refer to the exhibit. Routers RA and RB are IS-IS peers configured for NSF but router RC is an IS-IS peer without NSF capability. If RA undergoes processor switchover what is the effect on the network environment?

A. If RC is operating without the Cisco configuration option all three routers tear down their peering relationships and re-establish peering

B. All peer relationships remain up, but the link-state database is rebuilt on each device

C. All peer relationships remain up and the link-state database is unchanged

D. If RC is operating without the Cisco configuration option only 2 routers tear down their peering relationships and re-establish peering

Correct Answer: B

Question 2

Drag and Drop Question
Drag and drop the features about multicast from the left onto the multicast protocols on the right.
Not all options ate used.

Correct Answer:

Question 3

Refer to the exhibit. A network engineer just replaced five routers on this OSPF network. When the routing protocol is brought up, R5 cannot reach routes that originate on R1. The engineer verified that all connected links have established neighbor relationships. R5 reaches routes originating on R3 and R4. Which action resolves the issue?

A. Configure an OSPF virtual link to bridge Area 0 on routers R3 and R4.

B. Configure automatic neighbor discovery on R1 and R5.

C. Configure OSPF to have a contiguous Area 0.

D. Configure each link to be point-to-point.

Correct Answer: A

Question 4

Refer to the exhibit. An engineer is troubleshooting an issue with traffic steering using the color- only automated steering mechanism. BGP is failing to automatically steer traffic into an SR policy with the given color of a route, regardless of the next hop. The Layer 2 configuration is correct, and the physical connection between the devices is working normally. Which additional command sequence must the engineer add to correct the issue?

A. Cisco(config)# segment-routing
Cisco(config-sr)# traffic-eng
Cisco(config-sr-te)# policy P1
Cisco(config-sr-te-policy)# color 1 end-point ipv4 0.0.0.0

B. Cisco(config)# segment-routing traffic-eng
Cisco(config-sr-te)# policy P1
Cisco(config-sr-te-policy)# color 1 end-point ipv4 1.1.1.1
Cisco(config-sr-te-policy )# autoroute
Cisco(config-sr-te-policy-autoroute)# include all

C. Cisco# configure
Cisco(config)# segment-routing
Cisco(config-sr)# traffic-eng
Cisco(config-sr-te)# policy P1
Cisco(config-sr-te-policy)# color 1 end-point

D. Cisco(config)# segment-routing
Cisco(config-sr)# traffic-eng
Cisco(config-sr-te)# policy P1
Cisco(config-sr-te-policy)# color 1 end ipv4 1.1.1.1
Cisco(config-sr-te-policy)# autoroute include all

Correct Answer: A

Question 5

An SP core is running PIM on the network. Multicast groups in this networkare in the 232.0.0.0/8 range. Which commandenables multicast routing operations without using an RP?

A. ip pim bidir-enable

B. ip pim ssm default

C. ip pim register-source

D. ip pim autorp

Correct Answer: B

Question 6

Refer to the exhibit. MPLS traffic from the packet core that is connected to router RX (10.10.10.1) to the radio network that is connected to router RB (10.10.10.6) uses the longer route RB R2 RY RX RX and R2 are configured with a default value of LDP hello and hold intervals. The team verified that OSPF neighborship in Area 0 is established between RX and R2.
Which action must be taken to choose the shortest path and resolve the issue?

A.

B.

C.

D.

Correct Answer: D

Question 7

A network engineer is troubleshooting OSPF multiarea.
Which Cisco IOS XR feature should the engineer use in order to streamline OSPF issue?

A. DR support for topology management

B. show lp ospf topology command

C. hierarchical CLI

D. routing process enabled by default on all interfaces

Correct Answer: C

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Question 8

Refer to the exhibit. The service provider provides IPv6 connectivity to large enterprise customers with offices spanning several geographic regions SRv6 is running in the service provider core.
The service provider just signed a contract with a new customer that is still running IPv4. The new customer needs connectivity between its two sites connected via CE1 and CE2 and the internet.
Which action must the service provider s network-engineering team take to provide connectivity across the SRv6 data plane?

A. Implement an NTP master and sync the timers on the P and PE routers

B. Redistribute the IPv4 routes from CE2 and CE1 on their respective PEs

C. Translate the IPv4 addresses to an IPv6 address on each CE

D. Encapsulate IPv4 traffic from the CEs on their respective PEs through a TE path between PE1 and PE2.

Correct Answer: D

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Question 9

An engineer applied the summarization configuration on R1 for four networks (192.168.20.0/24 to
192.168.23.0/24) in area 1 and eight networks (192.168.32.0/24 to 192.168.39.0/24) in area 2 to stop the flooding of all the customer routes. While checking the routing table of R2, the engineer noticed that R1 is still sending only specific routes to R2.
Which configuration should the engineer apply on R1 to summarize routes?

A.

B.

C.

D.

Correct Answer: D

Question 10

Refer to the exhibit. A network engineer configured routers R1 and R5 to run in IS-IS Level 1 mode and router R6 to run in IS-IS Level 2 mode. All other routers are running as Level 1 / Level
2 routers. An engineer expects traffic from R1 to R6 to pass via R2, but IS-IS routing has calculated the best path via R4. Which action corrects the problem?

A. Remove the link metric for the link from router R1 to router R2.

B. Change the link metric for the link from router R1 to router R2 to 1.

C. Configure all routers as Level 1 routers.

D. Configure all routers as Level 1 / Level 2 routers.

Correct Answer: B

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Question 11

Refer to the exhibit. Multicast traffic destined from T1 and T2 routers to RP routers works well. A network engineer observes problems with multicast traffic flows between Site-A and Site-B. Site- A users fail to receive multicast stream on Site-B via RPTV site, while Site-B users fail to receive multicast stream on Site-A via RPTZ site. Which action must be implemented to resolve the issues?

A. Allow the OSPF and MSDP packets on the firewall.

B. Configure Site-A and Site-B in 10.80.148./24 subnet.

C. Establish MDSP peering with interface IP subnet.

D. Configure direct OSPF peering between Site-A and Site-B.

Correct Answer: A

Question 12

While configuring Cisco NSF awareness, a network engineer enters the bgp graceful-restart command after the BGP session is established in a router that runs IOS XE Software. Graceful restart capabilities are not exchanged. Which two actions should be taken? (Choose two.)

A. Issue the clear ip bgp * command

B. Reload the router

C. Verify that BGP route dampening is configured

D. Issue the show ip bgp neighbors command.

E. Reduce BGP convergence time

Correct Answer: A,B

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Question 13

What is one of the configuration errors within an AS that can stop a Cisco IOS-XR router from announcing certain prefixes to its EBGP peers?

A. The outbound BGP route policy only has set actions defined without any pass actions defined

B. Some prefixes were mistagged with the no-export BGP community

C. The inbound BGP route policy only has set actions defined without any pass actions defined

D. Some prefixes were set with an MED of 0

Correct Answer: B

Question 14

Refer to the exhibit. Which two commands must the engineer configure for the company's PIM- PIM network to enable Auto-RP mappings to be sent over the FastEthernet0/0 interface without affecting normal operation? (Choose two)

A. enable sparse-mode

B. enable Auto-RP announcements

C. enable sparse-dense mode

D. enable dense mode

E. enable auto-rp listener

Correct Answer: C,E

Question 15

Refer to the exhibit. XR1 and XR2 are sending the prefix 10.11.11.0/24 to XR3.
A configured policy on XR1 is incorrectly prepending AS path 11 11 12 12 onto this prefix.
A network operator wants to add a policy onto XR3 that will not allow the falsely prepending prefix from being installed.
Which policy configuration applied to the XR3 neighbor configuration for XR1 can accomplish this requirement without impact to other or future received routes?

A.

B.

C.

D.

Correct Answer: C

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Cisco Implementing Cisco Service Provider Advanced Routing Solutions - 300-510 Exam Practice Test

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