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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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Cisco 300-410 Practice Test 2

Question 10

At the Lakeside transit hub, OSPF routes enter EIGRP through R-LAK-CORE1 and are later returned to OSPF at the East depot network, producing unstable preferred paths to 10.32.0.0/16. Which operational change most directly addresses the fault described?

  1. Align the advertised summary with reachable component routes or provide a valid destination for every advertised component.
  2. Tag redistributed routes at entry and filter those tags from re-entering their origin protocol.
  3. Bind the route-map match statement to the correct prefix-list for the redistributed address family.
  4. Configure the summary at the appropriate OSPF area border router for that source area.

Explanation

Correct Answer

B:

The fault at the Lakeside transit hub has a specific cause. Mutual redistribution without route-origin controls allows a route to be injected back into its source domain. Tag redistributed routes at entry and filter those tags from re-entering their origin protocol. Confirm success against this result: Routes retain an origin tag and the return redistribution point rejects already-imported routes.

Incorrect Answers

A:

That change targets summary black hole from missing component, not the reported redistribution loop route tagging fault at the Lakeside transit hub. Mutual redistribution without route-origin controls allows a route to be injected back into its source domain.

C:

This could help where route-map match direction in redistribution is the issue, but not for the evidence reported at the Lakeside transit hub. Mutual redistribution without route-origin controls allows a route to be injected back into its source domain.

D:

That change targets ospf area range configured on wrong border, not the reported redistribution loop route tagging fault at the Lakeside transit hub. Mutual redistribution without route-origin controls allows a route to be injected back into its source domain.

Question 11

At the Pinecrest freight terminal, R-PIN-WAN1 can see connected routes in its table, but EIGRP neighbors never learn them after redistribution is enabled without a metric. Which operational change most directly addresses the fault described?

  1. Align the advertised summary with reachable component routes or provide a valid destination for every advertised component.
  2. Provide an explicit valid EIGRP seed metric for redistributed routes or configure an appropriate default metric.
  3. Bind the route-map match statement to the correct prefix-list for the redistributed address family.
  4. Tag redistributed routes at entry and filter those tags from re-entering their origin protocol.

Explanation

Correct Answer

B:

At the Pinecrest freight terminal, the evidence points to a concrete mechanism rather than a generic outage. EIGRP needs a usable metric for routes introduced from a different source before they can be advertised. Provide an explicit valid EIGRP seed metric for redistributed routes or configure an appropriate default metric. Confirm it by checking that neighbors learn only the intended connected prefixes with a valid composite metric.

Incorrect Answers

A:

This could help where summary black hole from missing component is the issue, but not for the evidence reported at the Pinecrest freight terminal. EIGRP needs a usable metric for routes introduced from a different source before they can be advertised.

C:

This is appropriate for a different routing or network-control issue: The redistribution policy tests an unrelated set of routes rather than the intended matching prefixes. The stated evidence at the Pinecrest freight terminal instead concerns seed metric on eigrp redistribution.

D:

This could help where redistribution loop route tagging is the issue, but not for the evidence reported at the Pinecrest freight terminal. EIGRP needs a usable metric for routes introduced from a different source before they can be advertised.

Question 12

At the Westlake utility network, R-WLK-EDGE1 can see connected routes in its table, but EIGRP neighbors never learn them after redistribution is enabled without a metric. Which operational change most directly addresses the fault described?

  1. Tag redistributed routes at entry and filter those tags from re-entering their origin protocol.
  2. Align the advertised summary with reachable component routes or provide a valid destination for every advertised component.
  3. Provide an explicit valid EIGRP seed metric for redistributed routes or configure an appropriate default metric.
  4. Configure the summary at the appropriate OSPF area border router for that source area.

Explanation

Correct Answer

C:

At the Westlake utility network, the evidence points to a concrete mechanism rather than a generic outage. EIGRP needs a usable metric for routes introduced from a different source before they can be advertised. Provide an explicit valid EIGRP seed metric for redistributed routes or configure an appropriate default metric. Confirm it by checking that neighbors learn only the intended connected prefixes with a valid composite metric.

Incorrect Answers

A:

This is appropriate for a different routing or network-control issue: Mutual redistribution without route-origin controls allows a route to be injected back into its source domain. The stated evidence at the Westlake utility network instead concerns seed metric on eigrp redistribution.

B:

This could help where summary black hole from missing component is the issue, but not for the evidence reported at the Westlake utility network. EIGRP needs a usable metric for routes introduced from a different source before they can be advertised.

D:

This is appropriate for a different routing or network-control issue: OSPF inter-area summary generation belongs to the ABR, not an arbitrary internal area router. The stated evidence at the Westlake utility network instead concerns seed metric on eigrp redistribution.

Question 13

At the Bluewater clinical network, a route map on R-BLU-PE1 was intended to admit a partner prefix into OSPF, but it matches a different address-family prefix list. Which operational change most directly addresses the fault described?

  1. Configure the summary at the appropriate OSPF area border router for that source area.
  2. Align the advertised summary with reachable component routes or provide a valid destination for every advertised component.
  3. Bind the route-map match statement to the correct prefix-list for the redistributed address family.
  4. Provide an explicit valid EIGRP seed metric for redistributed routes or configure an appropriate default metric.

Explanation

Correct Answer

C:

Bind the route-map match statement to the correct prefix-list for the redistributed address family. That directly addresses the documented condition at the Bluewater clinical network: The redistribution policy tests an unrelated set of routes rather than the intended matching prefixes. Confirmation should show that the intended prefix appears as the expected external route while unrelated partner prefixes stay absent.

Incorrect Answers

A:

That change targets ospf area range configured on wrong border, not the reported route-map match direction in redistribution fault at the Bluewater clinical network. The redistribution policy tests an unrelated set of routes rather than the intended matching prefixes.

B:

This is appropriate for a different routing or network-control issue: An aggregate advertisement masks loss of a more specific reachable route and attracts traffic to an unreachable subnet. The stated evidence at the Bluewater clinical network instead concerns route-map match direction in redistribution.

D:

That change targets seed metric on eigrp redistribution, not the reported route-map match direction in redistribution fault at the Bluewater clinical network. The redistribution policy tests an unrelated set of routes rather than the intended matching prefixes.

Question 14

At the Cedarfield retail branch, a route map on R-CED-BR1 was intended to admit a partner prefix into OSPF, but it matches a different address-family prefix list. Which operational change most directly addresses the fault described?

  1. Correct the interface MTU mismatch rather than bypassing the OSPF database-description check.
  2. Bind the route-map match statement to the correct prefix-list for the redistributed address family.
  3. Configure route-reflector-client relationships according to the iBGP topology design.
  4. Set compatible OSPF network types appropriate to the actual transit medium on both ends.

Explanation

Correct Answer

B:

At the Cedarfield retail branch, the evidence points to a concrete mechanism rather than a generic outage. The redistribution policy tests an unrelated set of routes rather than the intended matching prefixes. Bind the route-map match statement to the correct prefix-list for the redistributed address family. Confirm it by checking that the intended prefix appears as the expected external route while unrelated partner prefixes stay absent.

Incorrect Answers

A:

This could help where ospf mtu exstart is the issue, but not for the evidence reported at the Cedarfield retail branch. The redistribution policy tests an unrelated set of routes rather than the intended matching prefixes.

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 Cedarfield retail branch instead concerns route-map match direction in redistribution.

D:

This could help where ospf dr network-type mismatch is the issue, but not for the evidence reported at the Cedarfield retail branch. The redistribution policy tests an unrelated set of routes rather than the intended matching prefixes.

Question 15

At the Ironwood training campus, R-IRN-RT1 originates an aggregate toward the Central learning center; one subnet inside the summary was removed locally, yet traffic for that subnet keeps arriving and is discarded. Which operational change most directly addresses the fault described?

  1. Implement narrowly scoped inter-VRF route exchange using supported route leaking or explicit routing between VRFs.
  2. Make the EIGRP authentication mode and key configuration consistent on both ends.
  3. Associate the partner interface with the correct VRF and restore its address configuration as required.
  4. Align the advertised summary with reachable component routes or provide a valid destination for every advertised component.

Explanation

Correct Answer

D:

The fault at the Ironwood training campus has a specific cause. An aggregate advertisement masks loss of a more specific reachable route and attracts traffic to an unreachable subnet. Align the advertised summary with reachable component routes or provide a valid destination for every advertised component. Confirm success against this result: Each prefix covered by the aggregate has a valid forwarding path, or the aggregate is appropriately withdrawn.

Incorrect Answers

A:

This is appropriate for a different routing or network-control issue: VRF-Lite intentionally isolates routing tables, and sharing needs a configured route exchange. The stated evidence at the Ironwood training campus instead concerns summary black hole from missing component.

B:

This could help where eigrp authentication mismatch is the issue, but not for the evidence reported at the Ironwood training campus. An aggregate advertisement masks loss of a more specific reachable route and attracts traffic to an unreachable subnet.

C:

That change targets vrf-lite interface assignment, not the reported summary black hole from missing component fault at the Ironwood training campus. An aggregate advertisement masks loss of a more specific reachable route and attracts traffic to an unreachable subnet.

Question 16

At the Harborview media campus, R-HAR-DIST1 originates an aggregate toward the Inland content hub; one subnet inside the summary was removed locally, yet traffic for that subnet keeps arriving and is discarded. Which operational change most directly addresses the fault described?

  1. Align the advertised summary with reachable component routes or provide a valid destination for every advertised component.
  2. Enable and tune supported BFD sessions on the routing adjacencies that need rapid forwarding failure detection.
  3. Configure matching EIGRP autonomous-system values for the participating adjacency.
  4. Compare the route sources by administrative distance and adjust the intended route preference only after confirming both next hops.

Explanation

Correct Answer

A:

At the Harborview media campus, the evidence points to a concrete mechanism rather than a generic outage. An aggregate advertisement masks loss of a more specific reachable route and attracts traffic to an unreachable subnet. Align the advertised summary with reachable component routes or provide a valid destination for every advertised component. Confirm it by checking that each prefix covered by the aggregate has a valid forwarding path, or the aggregate is appropriately withdrawn.

Incorrect Answers

B:

This is appropriate for a different routing or network-control issue: IGP hello/dead timers alone are too slow to detect the observed forwarding-path failure. The stated evidence at the Harborview media campus instead concerns summary black hole from missing component.

C:

This could help where eigrp as mismatch is the issue, but not for the evidence reported at the Harborview media campus. An aggregate advertisement masks loss of a more specific reachable route and attracts traffic to an unreachable subnet.

D:

That change targets routing-source administrative distance, not the reported summary black hole from missing component fault at the Harborview media campus. An aggregate advertisement masks loss of a more specific reachable route and attracts traffic to an unreachable subnet.

Question 17

At the Northport logistics site, engineers add an OSPF area-range command to an internal router, but the intended inter-area summary never appears at the ABR facing the Richmond distribution center. Which operational change most directly addresses the fault described?

  1. Implement narrowly scoped inter-VRF route exchange using supported route leaking or explicit routing between VRFs.
  2. Set compatible OSPF network types appropriate to the actual transit medium on both ends.
  3. Configure eBGP multihop and reliable loopback reachability for the non-direct peer as appropriate.
  4. Configure the summary at the appropriate OSPF area border router for that source area.

Explanation

Correct Answer

D:

Configure the summary at the appropriate OSPF area border router for that source area. That directly addresses the documented condition at the Northport logistics site: OSPF inter-area summary generation belongs to the ABR, not an arbitrary internal area router. Confirmation should show that the ABR advertises the intended inter-area summary with correct reachability for its component networks.

Incorrect Answers

A:

This could help where vrf route leaking is the issue, but not for the evidence reported at the Northport logistics site. OSPF inter-area summary generation belongs to the ABR, not an arbitrary internal area router.

B:

That change targets ospf dr network-type mismatch, not the reported ospf area range configured on wrong border fault at the Northport logistics site. OSPF inter-area summary generation belongs to the ABR, not an arbitrary internal area router.

C:

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 Northport logistics site instead concerns ospf area range configured on wrong border.

Question 18

At the Hillcrest research lab, engineers add an OSPF area-range command to an internal router, but the intended inter-area summary never appears at the ABR facing the Coastal compute center. Which operational change most directly addresses the fault described?

  1. Associate the partner interface with the correct VRF and restore its address configuration as required.
  2. Configure the summary at the appropriate OSPF area border router for that source area.
  3. Attach an inbound BGP prefix filter that explicitly permits the authorized customer set and rejects the rest.
  4. Set compatible OSPF network types appropriate to the actual transit medium on both ends.

Explanation

Correct Answer

B:

Configure the summary at the appropriate OSPF area border router for that source area. That directly addresses the documented condition at the Hillcrest research lab: OSPF inter-area summary generation belongs to the ABR, not an arbitrary internal area router. Confirmation should show that the ABR advertises the intended inter-area summary with correct reachability for its component networks.

Incorrect Answers

A:

This is appropriate for a different routing or network-control issue: The interface was not placed in the customer VRF, so routing separation is ineffective for that link. The stated evidence at the Hillcrest research lab instead concerns ospf area range configured on wrong border.

C:

That change targets bgp inbound prefix filtering, not the reported ospf area range configured on wrong border fault at the Hillcrest research lab. OSPF inter-area summary generation belongs to the ABR, not an arbitrary internal area router.

D:

This is appropriate for a different routing or network-control issue: Different OSPF network-type expectations lead to inconsistent adjacency and DR behavior. The stated evidence at the Hillcrest research lab instead concerns ospf area range configured on wrong border.

Question 19

At the Granite manufacturing plant, R-GRA-PE1 has a correct PBR route map, but client traffic entering the LAN interface still follows the normal routing table toward the Meridian corporate campus. Which operational change most directly addresses the fault described?

  1. Associate the partner interface with the correct VRF and restore its address configuration as required.
  2. Use verified next-hop availability or tracking so the PBR action does not force traffic to an unreachable gateway.
  3. Apply the PBR route map to the correct incoming interface with the appropriate policy command.
  4. Implement narrowly scoped inter-VRF route exchange using supported route leaking or explicit routing between VRFs.

Explanation

Correct Answer

C:

Apply the PBR route map to the correct incoming interface with the appropriate policy command. That directly addresses the documented condition at the Granite manufacturing plant: The policy is defined but not applied on the interface where the targeted packets enter. Confirmation should show that matching packets use the policy-selected next hop while nonmatching traffic keeps normal forwarding.

Incorrect Answers

A:

That change targets vrf-lite interface assignment, not the reported policy-based routing ingress application fault at the Granite manufacturing plant. The policy is defined but not applied on the interface where the targeted packets enter.

B:

This is appropriate for a different routing or network-control issue: A static policy next hop is being used without confirming that forwarding through it is possible. The stated evidence at the Granite manufacturing plant instead concerns policy-based routing ingress application.

D:

That change targets vrf route leaking, not the reported policy-based routing ingress application fault at the Granite manufacturing plant. The policy is defined but not applied on the interface where the targeted packets enter.

Question 20

At the Elmfield engineering office, R-ELM-EDGE1 has a correct PBR route map, but client traffic entering the LAN interface still follows the normal routing table toward the Midtown engineering center. Which operational change most directly addresses the fault described?

  1. Apply the PBR route map to the correct incoming interface with the appropriate policy command.
  2. Enable and tune supported BFD sessions on the routing adjacencies that need rapid forwarding failure detection.
  3. Use verified next-hop availability or tracking so the PBR action does not force traffic to an unreachable gateway.
  4. Associate the partner interface with the correct VRF and restore its address configuration as required.

Explanation

Correct Answer

A:

Apply the PBR route map to the correct incoming interface with the appropriate policy command. That directly addresses the documented condition at the Elmfield engineering office: The policy is defined but not applied on the interface where the targeted packets enter. Confirmation should show that matching packets use the policy-selected next hop while nonmatching traffic keeps normal forwarding.

Incorrect Answers

B:

That change targets bfd independent fast failure detection, not the reported policy-based routing ingress application fault at the Elmfield engineering office. The policy is defined but not applied on the interface where the targeted packets enter.

C:

This is appropriate for a different routing or network-control issue: A static policy next hop is being used without confirming that forwarding through it is possible. The stated evidence at the Elmfield engineering office instead concerns policy-based routing ingress application.

D:

This could help where vrf-lite interface assignment is the issue, but not for the evidence reported at the Elmfield engineering office. The policy is defined but not applied on the interface where the targeted packets enter.