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Cisco 300-410 Bundle

Exam Code: 300-410

Exam Name Implementing Cisco Enterprise Advanced Routing and Services (ENARSI)

Certification Provider: Cisco

Corresponding Certification: CCNP Enterprise

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Implementing Cisco Enterprise Advanced Routing and Services (ENARSI) (300-410) Practice Tests

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Cisco 300-410 Practice Test 7

Question 60

At the Harborview media campus, R-HAR-DIST1 must peer by eBGP with a reachable loopback on R-INL-DIST2 multiple routed hops away; TCP never reaches Established using default TTL behavior. Which operational change most directly addresses the fault described?

  1. Use a consistent BGP local-preference policy within the AS to favor the required exit.
  2. Provide an IGP route to the external next hop or use an appropriate next-hop-self policy on the advertising iBGP router.
  3. Attach an inbound BGP prefix filter that explicitly permits the authorized customer set and rejects the rest.
  4. Configure eBGP multihop and reliable loopback reachability for the non-direct peer as appropriate.

Explanation

Correct Answer

D:

The fault at the Harborview media campus has a specific cause. The default eBGP directly connected peer assumptions do not support this multiple-hop session. Configure eBGP multihop and reliable loopback reachability for the non-direct peer as appropriate. Confirm success against this result: BGP reaches Established over the loopback path and exchanges authorized prefixes.

Incorrect Answers

A:

This is appropriate for a different routing or network-control issue: BGP local preference is examined before AS-path length, and the present attributes favor the wrong exit. The stated evidence at the Harborview media campus instead concerns ebgp non-direct neighbor multihop.

B:

This could help where ibgp next-hop reachability is the issue, but not for the evidence reported at the Harborview media campus. The default eBGP directly connected peer assumptions do not support this multiple-hop session.

C:

That change targets bgp inbound prefix filtering, not the reported ebgp non-direct neighbor multihop fault at the Harborview media campus. The default eBGP directly connected peer assumptions do not support this multiple-hop session.

Question 61

At the Northport logistics site, R-NOR-WAN1 learns a customer prefix through iBGP, but cannot install it because the advertised external next hop is not reachable inside the AS. Which operational change most directly addresses the fault described?

  1. Configure eBGP multihop and reliable loopback reachability for the non-direct peer as appropriate.
  2. Configure route-reflector-client relationships according to the iBGP topology design.
  3. Provide an IGP route to the external next hop or use an appropriate next-hop-self policy on the advertising iBGP router.
  4. Use a consistent BGP local-preference policy within the AS to favor the required exit.

Explanation

Correct Answer

C:

Provide an IGP route to the external next hop or use an appropriate next-hop-self policy on the advertising iBGP router. That directly addresses the documented condition at the Northport logistics site: The iBGP-learned path retains a next hop that the receiving router cannot resolve. Confirmation should show that the BGP next hop resolves and the intended prefix becomes eligible for installation.

Incorrect Answers

A:

That change targets ebgp non-direct neighbor multihop, not the reported ibgp next-hop reachability fault at the Northport logistics site. The iBGP-learned path retains a next hop that the receiving router cannot resolve.

B:

This is appropriate for a different routing or network-control issue: A normal iBGP speaker does not re-advertise routes learned from one iBGP peer to another. The stated evidence at the Northport logistics site instead concerns ibgp next-hop reachability.

D:

That change targets bgp local preference path policy, not the reported ibgp next-hop reachability fault at the Northport logistics site. The iBGP-learned path retains a next hop that the receiving router cannot resolve.

Question 62

At the Hillcrest research lab, R-HCR-RT1 learns a customer prefix through iBGP, but cannot install it because the advertised external next hop is not reachable inside the AS. Which operational change most directly addresses the fault described?

  1. Attach an inbound BGP prefix filter that explicitly permits the authorized customer set and rejects the rest.
  2. Provide an IGP route to the external next hop or use an appropriate next-hop-self policy on the advertising iBGP router.
  3. Configure route-reflector-client relationships according to the iBGP topology design.
  4. Use a consistent BGP local-preference policy within the AS to favor the required exit.

Explanation

Correct Answer

B:

At the Hillcrest research lab, the evidence points to a concrete mechanism rather than a generic outage. The iBGP-learned path retains a next hop that the receiving router cannot resolve. Provide an IGP route to the external next hop or use an appropriate next-hop-self policy on the advertising iBGP router. Confirm it by checking that the BGP next hop resolves and the intended prefix becomes eligible for installation.

Incorrect Answers

A:

This could help where bgp inbound prefix filtering is the issue, but not for the evidence reported at the Hillcrest research lab. The iBGP-learned path retains a next hop that the receiving router cannot resolve.

C:

This is appropriate for a different routing or network-control issue: A normal iBGP speaker does not re-advertise routes learned from one iBGP peer to another. The stated evidence at the Hillcrest research lab instead concerns ibgp next-hop reachability.

D:

This could help where bgp local preference path policy is the issue, but not for the evidence reported at the Hillcrest research lab. The iBGP-learned path retains a next hop that the receiving router cannot resolve.

Question 63

At the Granite manufacturing plant, two iBGP clients connected to a central router do not learn each other's routes because the central router is not configured as a route reflector. Which operational change most directly addresses the fault described?

  1. Use a consistent BGP local-preference policy within the AS to favor the required exit.
  2. Apply an appropriate AS-wide policy such as local preference rather than relying on router-local weight.
  3. Provide an IGP route to the external next hop or use an appropriate next-hop-self policy on the advertising iBGP router.
  4. Configure route-reflector-client relationships according to the iBGP topology design.

Explanation

Correct Answer

D:

The fault at the Granite manufacturing plant has a specific cause. A normal iBGP speaker does not re-advertise routes learned from one iBGP peer to another. Configure route-reflector-client relationships according to the iBGP topology design. Confirm success against this result: Routes learned from one client are appropriately reflected to other clients without a full mesh.

Incorrect Answers

A:

This is appropriate for a different routing or network-control issue: BGP local preference is examined before AS-path length, and the present attributes favor the wrong exit. The stated evidence at the Granite manufacturing plant instead concerns ibgp route reflection.

B:

This could help where bgp cisco weight local only is the issue, but not for the evidence reported at the Granite manufacturing plant. A normal iBGP speaker does not re-advertise routes learned from one iBGP peer to another.

C:

That change targets ibgp next-hop reachability, not the reported ibgp route reflection fault at the Granite manufacturing plant. A normal iBGP speaker does not re-advertise routes learned from one iBGP peer to another.

Question 64

At the Elmfield engineering office, two iBGP clients connected to a central router do not learn each other's routes because the central router is not configured as a route reflector. Which operational change most directly addresses the fault described?

  1. Attach an inbound BGP prefix filter that explicitly permits the authorized customer set and rejects the rest.
  2. Configure eBGP multihop and reliable loopback reachability for the non-direct peer as appropriate.
  3. Configure route-reflector-client relationships according to the iBGP topology design.
  4. Use a consistent BGP local-preference policy within the AS to favor the required exit.

Explanation

Correct Answer

C:

Configure route-reflector-client relationships according to the iBGP topology design. That directly addresses the documented condition at the Elmfield engineering office: A normal iBGP speaker does not re-advertise routes learned from one iBGP peer to another. Confirmation should show that routes learned from one client are appropriately reflected to other clients without a full mesh.

Incorrect Answers

A:

That change targets bgp inbound prefix filtering, not the reported ibgp route reflection fault at the Elmfield engineering office. A normal iBGP speaker does not re-advertise routes learned from one iBGP peer to another.

B:

This is appropriate for a different routing or network-control issue: The default eBGP directly connected peer assumptions do not support this multiple-hop session. The stated evidence at the Elmfield engineering office instead concerns ibgp route reflection.

D:

That change targets bgp local preference path policy, not the reported ibgp route reflection fault at the Elmfield engineering office. A normal iBGP speaker does not re-advertise routes learned from one iBGP peer to another.

Question 65

At the Oakbridge insurance office, two egress providers advertise the same prefix; one has a shorter AS path but the business wants all internal routers to prefer the other exit. Which operational change most directly addresses the fault described?

  1. Configure eBGP multihop and reliable loopback reachability for the non-direct peer as appropriate.
  2. Use a consistent BGP local-preference policy within the AS to favor the required exit.
  3. Provide an IGP route to the external next hop or use an appropriate next-hop-self policy on the advertising iBGP router.
  4. Apply an appropriate AS-wide policy such as local preference rather than relying on router-local weight.

Explanation

Correct Answer

B:

At the Oakbridge insurance office, the evidence points to a concrete mechanism rather than a generic outage. BGP local preference is examined before AS-path length, and the present attributes favor the wrong exit. Use a consistent BGP local-preference policy within the AS to favor the required exit. Confirm it by checking that internal routers prefer the exit with the higher approved local-preference value.

Incorrect Answers

A:

This could help where ebgp non-direct neighbor multihop is the issue, but not for the evidence reported at the Oakbridge insurance office. BGP local preference is examined before AS-path length, and the present attributes favor the wrong exit.

C:

This is appropriate for a different routing or network-control issue: The iBGP-learned path retains a next hop that the receiving router cannot resolve. The stated evidence at the Oakbridge insurance office instead concerns bgp local preference path policy.

D:

This could help where bgp cisco weight local only is the issue, but not for the evidence reported at the Oakbridge insurance office. BGP local preference is examined before AS-path length, and the present attributes favor the wrong exit.

Question 66

At the Aspen agricultural office, two egress providers advertise the same prefix; one has a shorter AS path but the business wants all internal routers to prefer the other exit. Which operational change most directly addresses the fault described?

  1. Apply an appropriate AS-wide policy such as local preference rather than relying on router-local weight.
  2. Configure route-reflector-client relationships according to the iBGP topology design.
  3. Use a consistent BGP local-preference policy within the AS to favor the required exit.
  4. Configure eBGP multihop and reliable loopback reachability for the non-direct peer as appropriate.

Explanation

Correct Answer

C:

At the Aspen agricultural office, the evidence points to a concrete mechanism rather than a generic outage. BGP local preference is examined before AS-path length, and the present attributes favor the wrong exit. Use a consistent BGP local-preference policy within the AS to favor the required exit. Confirm it by checking that internal routers prefer the exit with the higher approved local-preference value.

Incorrect Answers

A:

This is appropriate for a different routing or network-control issue: Cisco BGP weight affects path selection only on the local router and is not propagated to peers. The stated evidence at the Aspen agricultural office instead concerns bgp local preference path policy.

B:

This could help where ibgp route reflection is the issue, but not for the evidence reported at the Aspen agricultural office. BGP local preference is examined before AS-path length, and the present attributes favor the wrong exit.

D:

This is appropriate for a different routing or network-control issue: The default eBGP directly connected peer assumptions do not support this multiple-hop session. The stated evidence at the Aspen agricultural office instead concerns bgp local preference path policy.

Question 67

At the Cedarbrook hospital, an engineer sets a Cisco BGP weight on R-CDR-WAN1 and expects that value to change exit selection on every other router in the AS. Which operational change most directly addresses the fault described?

  1. Attach an inbound BGP prefix filter that explicitly permits the authorized customer set and rejects the rest.
  2. Apply an appropriate AS-wide policy such as local preference rather than relying on router-local weight.
  3. Configure route-reflector-client relationships according to the iBGP topology design.
  4. Provide an IGP route to the external next hop or use an appropriate next-hop-self policy on the advertising iBGP router.

Explanation

Correct Answer

B:

The fault at the Cedarbrook hospital has a specific cause. Cisco BGP weight affects path selection only on the local router and is not propagated to peers. Apply an appropriate AS-wide policy such as local preference rather than relying on router-local weight. Confirm success against this result: All relevant internal routers select the intended egress, not just the locally tuned router.

Incorrect Answers

A:

That change targets bgp inbound prefix filtering, not the reported bgp cisco weight local only fault at the Cedarbrook hospital. Cisco BGP weight affects path selection only on the local router and is not propagated to peers.

C:

This could help where ibgp route reflection is the issue, but not for the evidence reported at the Cedarbrook hospital. Cisco BGP weight affects path selection only on the local router and is not propagated to peers.

D:

That change targets ibgp next-hop reachability, not the reported bgp cisco weight local only fault at the Cedarbrook hospital. Cisco BGP weight affects path selection only on the local router and is not propagated to peers.

Question 68

At the Redwood medical campus, an engineer sets a Cisco BGP weight on R-RED-EDGE1 and expects that value to change exit selection on every other router in the AS. Which operational change most directly addresses the fault described?

  1. Configure eBGP multihop and reliable loopback reachability for the non-direct peer as appropriate.
  2. Attach an inbound BGP prefix filter that explicitly permits the authorized customer set and rejects the rest.
  3. Provide an IGP route to the external next hop or use an appropriate next-hop-self policy on the advertising iBGP router.
  4. Apply an appropriate AS-wide policy such as local preference rather than relying on router-local weight.

Explanation

Correct Answer

D:

Apply an appropriate AS-wide policy such as local preference rather than relying on router-local weight. That directly addresses the documented condition at the Redwood medical campus: Cisco BGP weight affects path selection only on the local router and is not propagated to peers. Confirmation should show that all relevant internal routers select the intended egress, not just the locally tuned router.

Incorrect Answers

A:

This could help where ebgp non-direct neighbor multihop is the issue, but not for the evidence reported at the Redwood medical campus. Cisco BGP weight affects path selection only on the local router and is not propagated to peers.

B:

That change targets bgp inbound prefix filtering, not the reported bgp cisco weight local only fault at the Redwood medical campus. Cisco BGP weight affects path selection only on the local router and is not propagated to peers.

C:

This is appropriate for a different routing or network-control issue: The iBGP-learned path retains a next hop that the receiving router cannot resolve. The stated evidence at the Redwood medical campus instead concerns bgp cisco weight local only.

Question 69

At the Clearwater library district, an eBGP neighbor begins advertising unrelated routes and R-CLW-EDGE1 installs more prefixes than the agreed customer set. Which operational change most directly addresses the fault described?

  1. Provide an IGP route to the external next hop or use an appropriate next-hop-self policy on the advertising iBGP router.
  2. Use a consistent BGP local-preference policy within the AS to favor the required exit.
  3. Attach an inbound BGP prefix filter that explicitly permits the authorized customer set and rejects the rest.
  4. Apply an appropriate AS-wide policy such as local preference rather than relying on router-local weight.

Explanation

Correct Answer

C:

At the Clearwater library district, the evidence points to a concrete mechanism rather than a generic outage. The current inbound BGP policy fails to constrain accepted advertisements to contracted prefixes. Attach an inbound BGP prefix filter that explicitly permits the authorized customer set and rejects the rest. Confirm it by checking that only the approved routes remain in the accepted BGP table after soft policy re-evaluation.

Incorrect Answers

A:

This is appropriate for a different routing or network-control issue: The iBGP-learned path retains a next hop that the receiving router cannot resolve. The stated evidence at the Clearwater library district instead concerns bgp inbound prefix filtering.

B:

This could help where bgp local preference path policy is the issue, but not for the evidence reported at the Clearwater library district. The current inbound BGP policy fails to constrain accepted advertisements to contracted prefixes.

D:

This is appropriate for a different routing or network-control issue: Cisco BGP weight affects path selection only on the local router and is not propagated to peers. The stated evidence at the Clearwater library district instead concerns bgp inbound prefix filtering.

Question 70

At the Bayview university campus, an eBGP neighbor begins advertising unrelated routes and R-BAY-DIST1 installs more prefixes than the agreed customer set. Which operational change most directly addresses the fault described?

  1. Configure route-reflector-client relationships according to the iBGP topology design.
  2. Attach an inbound BGP prefix filter that explicitly permits the authorized customer set and rejects the rest.
  3. Apply an appropriate AS-wide policy such as local preference rather than relying on router-local weight.
  4. Configure eBGP multihop and reliable loopback reachability for the non-direct peer as appropriate.

Explanation

Correct Answer

B:

The fault at the Bayview university campus has a specific cause. The current inbound BGP policy fails to constrain accepted advertisements to contracted prefixes. Attach an inbound BGP prefix filter that explicitly permits the authorized customer set and rejects the rest. Confirm success against this result: Only the approved routes remain in the accepted BGP table after soft policy re-evaluation.

Incorrect Answers

A:

That change targets ibgp route reflection, not the reported bgp inbound prefix filtering fault at the Bayview university campus. The current inbound BGP policy fails to constrain accepted advertisements to contracted prefixes.

C:

This could help where bgp cisco weight local only is the issue, but not for the evidence reported at the Bayview university campus. The current inbound BGP policy fails to constrain accepted advertisements to contracted prefixes.

D:

That change targets ebgp non-direct neighbor multihop, not the reported bgp inbound prefix filtering fault at the Bayview university campus. The current inbound BGP policy fails to constrain accepted advertisements to contracted prefixes.