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300-510
Implementing Cisco Service Provider Advanced Routing Solutions Questions and Answers

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Viewing page 2 out of 8 pages

Viewing questions 11-20 out of questions

Questions # 11:

Refer to the exhibit.

Question # 11

An engineer has successfully fixed BGP peering issue. R1 has an established eBGP

peering with R2 and R3. Which mechanism should the engineer apply in order to steer the traffic correctly?

Options:

The MED attribute can be applied on R2 to influence R1 to use it as the primary path.

The local preference attribute can be applied on R3 to influence AS 65513 to use AS 65515 as the

secondary path.

The weight attribute can be applied on R2 to influence AS 65513 to use AS 65515 as the primary path.

The IGP metric can be manipulated on R1 to allow traffic to be load balanced between R2 and R3.

Answer

Explanation

Some level of load balancing is achieved by default as BGP prefers shortest AS_PATH for certain prefix (Cisco BGP path selection algorithm - rule 4) . If 1-7 rules gives no preference for certain prefix then with rule 8. Prefer lowest IGP metric to BGP next hop we can force traffic to R2 or R3 influencing load distribution.

Questions # 12:

Refer to the exhibit.

Question # 12

A network operator is troubleshooting TE tunnels and discovers that the soft preemption is not working as desired. Where should the soft preemption be applied to solve the issue?

Options:

on the tail-end device for tunnel-te1 192.168.0.7

under the tunnel-te1 interface on PE1

explicitly for tunnel-te 1 under the Cisco MPLS TE configuration mode after the timeout setting

Under the interface Loopback0 necessary for this deployment type.

Answer

Questions # 13:

Refer to the exhibit.

Question # 13

Which task must you perform on interface g1/0/0 to complete the SSM implementation?

Options:

configure OSPFv3

enable CDP

disable IGMP

configure IGMPv3

Answer

Explanation

[Reference: https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipmulti_pim/configuration/xe-16/imc-pim-xe-16-book/imc-ssm.html]

Questions # 14:

Refer to the exhibit.

Question # 14

An engineer has configured all routers in the environment to run IS-IS Level 1 and Level 2 routing. The engineer wants traffic from R1 to R5 to pass via R2. but IS-IS routing has calculated the best path via R4. Which action corrects the problem?

Options:

Configure routers R1, R4, and R5 for Level 2 routing only.

Set the link metric for the link from router R1 to router R4 to 30 or more.

Set the link metric on R2 for the links from router R2 to routers R3 and R4 to 30 or more.

Configure routers R1, R2, and R5 for Level 1 routing only.

Answer

Questions # 15:

Refer io the exhibit.

Question # 15

While applying the configurations on two routers an engineer notices that OSPF adjacency Between them remains down Through the ping test the engineer confirmed that both me routers have Layer 3 reachability between them Which action should me engineer take to make the adjacencies to full?

Options:

Enter the command ip ospf authentication in R2 interface

Enable OSPF just inside the router OSPF process not in the interfaces of any router

Delete the area 0 authentication message-digest command from the OSPF process in R1

Delete the area 0 authentication message-digest command from the OSPF process in R2

Answer

Questions # 16:

Which difference must an engineer consider when Implementing Inter-domain and Intra-domain multicast routing on the network?

Options:

Intra-domain routing allows the service provider to control incoming and outgoing multicast data streams on its network, but inter-domain routing limits the service provider’s control.

Intra-domain routing uses the PIM and MBGP protocols for multicast routing, but inter-domain routing must use PIM.SSM or MSDP.

Intra-domain routing is dependent on the RP router within the same SP network, but inter-domain routing reduces the dependency on the other SP network.

Inter-domain routing supports policy routing to connect different multicast domains using PIM.SM, but intra-domain routing supports policy routing using PIM-SM only within a single domain.

Answer

Questions # 17:

For which reason do you deploy BGP confederations within a BGP transit backbone?

Options:

to support a larger number of eBGP peer sessions

to increase the number of routes that can be redistributed between the running IGP and BGP

to reduce the number of eBGP routes that must be shared between autonomous systems

to reduce the number of iBGP peering sessions

Answer

Questions # 18:

Refer to the exhibit.

Question # 18

What is the effect of this configuration?

Options:

It sets the keepalive timer to 30 milliseconds and the hold timer to 240 milliseconds.

It sets the keepalive timer to 30 seconds and the hold timer to 240 seconds.

It sets the hold timer to 30 milliseconds and the keepalive timer to 240 milliseconds.

It sets the hold timer to 30 seconds and the keepalive timer to 240 seconds.

Answer

Questions # 19:

Refer to the exhibit.

Question # 19

CE1 is the gateway router into the provider network via PE1. A network operator must

inject a default route into OSPF area 0. All devices inside area 0 must be able to reach PE1. Which configuration achieves this goal?

Question # 19

Options:

Option A

Option B

Option C

Option D

Answer

Explanation

[Reference: https://www.cisco.com/c/en/us/support/docs/ip/open-shortest-path-first-ospf/47868-ospfdb9.html]

Questions # 20:

Question # 20

Refer to the exhibit. This network is deployed with all connected links configured to run IS-IS. The routing protocol is enacted globally on each router, and the network engineer expects full routing Information to be shared among all routers. R5 is receiving routes from R4 but is missing routes from R1. Which action corrects the issue so that all routes are shared among the routers?