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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 10

Question 90

At the Cedarbrook hospital, two DMVPN devices share a reachable underlay yet their NHRP configuration reports incompatible network identifiers. Which operational change most directly addresses the fault described?

  1. Set matching NHRP network identifiers on tunnel interfaces participating in the same DMVPN cloud.
  2. Correct the spoke's configured NHRP next-hop server and registration mapping for the hub.
  3. Align NHRP authentication credentials between the spoke and its trusted hub.
  4. Verify that NHRP resolves the remote spoke's NBMA address and that direct tunnels are permitted.

Explanation

Correct Answer

A:

The fault at the Cedarbrook hospital has a specific cause. The NHRP tunnel interfaces are not configured to participate in the same logical NHRP network. Set matching NHRP network identifiers on tunnel interfaces participating in the same DMVPN cloud. Confirm success against this result: NHRP registration and resolution succeed in the intended cloud without joining a separate cloud.

Incorrect Answers

B:

This could help where dmvpn spoke registration to hub is the issue, but not for the evidence reported at the Cedarbrook hospital. The NHRP tunnel interfaces are not configured to participate in the same logical NHRP network.

C:

That change targets dmvpn nhrp authentication mismatch, not the reported dmvpn nhrp network id mismatch fault at the Cedarbrook hospital. The NHRP tunnel interfaces are not configured to participate in the same logical NHRP network.

D:

This is appropriate for a different routing or network-control issue: The origin spoke has not obtained the peer resolution needed to build an appropriate direct path. The stated evidence at the Cedarbrook hospital instead concerns dmvpn nhrp network id mismatch.

Question 91

At the Bayview university campus, a new spoke sends NHRP registration requests but the hub rejects them after a credential rotation. Which operational change most directly addresses the fault described?

  1. Update the spoke's NHRP NHS reference and relevant NBMA mapping to the operational hub.
  2. Use an appropriate multipoint GRE tunnel and NHRP resolution for dynamically discovered peers.
  3. Align NHRP authentication credentials between the spoke and its trusted hub.
  4. Verify the hub's NHRP redirect behavior and spokes' shortcut processing for the phase 3 design.

Explanation

Correct Answer

C:

Align NHRP authentication credentials between the spoke and its trusted hub. That directly addresses the documented condition at the Bayview university campus: NHRP registration messages are rejected because peers do not agree on their authentication secret. Confirmation should show that the spoke successfully registers at the hub and the accepted mappings reflect intended peers.

Incorrect Answers

A:

That change targets dmvpn spoke next-hop server address, not the reported dmvpn nhrp authentication mismatch fault at the Bayview university campus. NHRP registration messages are rejected because peers do not agree on their authentication secret.

B:

This is appropriate for a different routing or network-control issue: A fixed GRE destination prevents the tunnel from supporting arbitrary on-demand spoke destinations. The stated evidence at the Bayview university campus instead concerns dmvpn nhrp authentication mismatch.

D:

That change targets dmvpn phase 3 redirect and shortcut, not the reported dmvpn nhrp authentication mismatch fault at the Bayview university campus. NHRP registration messages are rejected because peers do not agree on their authentication secret.

Question 92

At the Clearwater library district, a new spoke sends NHRP registration requests but the hub rejects them after a credential rotation. Which operational change most directly addresses the fault described?

  1. Preserve remote spoke tunnel next hops in routing advertisements when using phase 2 direct forwarding.
  2. Align NHRP authentication credentials between the spoke and its trusted hub.
  3. Verify that NHRP resolves the remote spoke's NBMA address and that direct tunnels are permitted.
  4. Set matching NHRP network identifiers on tunnel interfaces participating in the same DMVPN cloud.

Explanation

Correct Answer

B:

At the Clearwater library district, the evidence points to a concrete mechanism rather than a generic outage. NHRP registration messages are rejected because peers do not agree on their authentication secret. Align NHRP authentication credentials between the spoke and its trusted hub. Confirm it by checking that the spoke successfully registers at the hub and the accepted mappings reflect intended peers.

Incorrect Answers

A:

This could help where dmvpn phase 2 spoke next-hop preservation is the issue, but not for the evidence reported at the Clearwater library district. NHRP registration messages are rejected because peers do not agree on their authentication secret.

C:

This is appropriate for a different routing or network-control issue: The origin spoke has not obtained the peer resolution needed to build an appropriate direct path. The stated evidence at the Clearwater library district instead concerns dmvpn nhrp authentication mismatch.

D:

This could help where dmvpn nhrp network id mismatch is the issue, but not for the evidence reported at the Clearwater library district. NHRP registration messages are rejected because peers do not agree on their authentication secret.

Question 93

At the Highland government office, an operator expects one DMVPN spoke tunnel interface to build dynamic tunnels toward multiple remote peers but configures only a fixed point-to-point GRE destination. Which operational change most directly addresses the fault described?

  1. Use an appropriate multipoint GRE tunnel and NHRP resolution for dynamically discovered peers.
  2. Preserve remote spoke tunnel next hops in routing advertisements when using phase 2 direct forwarding.
  3. Correct the spoke's configured NHRP next-hop server and registration mapping for the hub.
  4. Set matching NHRP network identifiers on tunnel interfaces participating in the same DMVPN cloud.

Explanation

Correct Answer

A:

The fault at the Highland government office has a specific cause. A fixed GRE destination prevents the tunnel from supporting arbitrary on-demand spoke destinations. Use an appropriate multipoint GRE tunnel and NHRP resolution for dynamically discovered peers. Confirm success against this result: The same tunnel interface can resolve and reach approved dynamic spoke peers.

Incorrect Answers

B:

This could help where dmvpn phase 2 spoke next-hop preservation is the issue, but not for the evidence reported at the Highland government office. A fixed GRE destination prevents the tunnel from supporting arbitrary on-demand spoke destinations.

C:

That change targets dmvpn spoke registration to hub, not the reported dmvpn mgre endpoint capability fault at the Highland government office. A fixed GRE destination prevents the tunnel from supporting arbitrary on-demand spoke destinations.

D:

This is appropriate for a different routing or network-control issue: The NHRP tunnel interfaces are not configured to participate in the same logical NHRP network. The stated evidence at the Highland government office instead concerns dmvpn mgre endpoint capability.

Question 94

At the Foothill municipal site, an operator expects one DMVPN spoke tunnel interface to build dynamic tunnels toward multiple remote peers but configures only a fixed point-to-point GRE destination. Which operational change most directly addresses the fault described?

  1. Use an appropriate multipoint GRE tunnel and NHRP resolution for dynamically discovered peers.
  2. Align NHRP authentication credentials between the spoke and its trusted hub.
  3. Update the spoke's NHRP NHS reference and relevant NBMA mapping to the operational hub.
  4. Preserve remote spoke tunnel next hops in routing advertisements when using phase 2 direct forwarding.

Explanation

Correct Answer

A:

At the Foothill municipal site, the evidence points to a concrete mechanism rather than a generic outage. A fixed GRE destination prevents the tunnel from supporting arbitrary on-demand spoke destinations. Use an appropriate multipoint GRE tunnel and NHRP resolution for dynamically discovered peers. Confirm it by checking that the same tunnel interface can resolve and reach approved dynamic spoke peers.

Incorrect Answers

B:

This is appropriate for a different routing or network-control issue: NHRP registration messages are rejected because peers do not agree on their authentication secret. The stated evidence at the Foothill municipal site instead concerns dmvpn mgre endpoint capability.

C:

This could help where dmvpn spoke next-hop server address is the issue, but not for the evidence reported at the Foothill municipal site. A fixed GRE destination prevents the tunnel from supporting arbitrary on-demand spoke destinations.

D:

That change targets dmvpn phase 2 spoke next-hop preservation, not the reported dmvpn mgre endpoint capability fault at the Foothill municipal site. A fixed GRE destination prevents the tunnel from supporting arbitrary on-demand spoke destinations.

Question 95

At the Silverstream data center, a newly installed spoke has the right NHRP network ID, yet it sends server queries to a retired hub tunnel address. Which operational change most directly addresses the fault described?

  1. Update the spoke's NHRP NHS reference and relevant NBMA mapping to the operational hub.
  2. Verify the hub's NHRP redirect behavior and spokes' shortcut processing for the phase 3 design.
  3. Verify that NHRP resolves the remote spoke's NBMA address and that direct tunnels are permitted.
  4. Correct the spoke's configured NHRP next-hop server and registration mapping for the hub.

Explanation

Correct Answer

A:

Update the spoke's NHRP NHS reference and relevant NBMA mapping to the operational hub. That directly addresses the documented condition at the Silverstream data center: NHRP messages are targeted at an obsolete next-hop server address even though the underlay works. Confirmation should show that the current hub responds to registrations and spoke resolution requests.

Incorrect Answers

B:

That change targets dmvpn phase 3 redirect and shortcut, not the reported dmvpn spoke next-hop server address fault at the Silverstream data center. NHRP messages are targeted at an obsolete next-hop server address even though the underlay works.

C:

This is appropriate for a different routing or network-control issue: The origin spoke has not obtained the peer resolution needed to build an appropriate direct path. The stated evidence at the Silverstream data center instead concerns dmvpn spoke next-hop server address.

D:

This could help where dmvpn spoke registration to hub is the issue, but not for the evidence reported at the Silverstream data center. NHRP messages are targeted at an obsolete next-hop server address even though the underlay works.

Question 96

At the Brookstone distribution branch, a newly installed spoke has the right NHRP network ID, yet it sends server queries to a retired hub tunnel address. Which operational change most directly addresses the fault described?

  1. Align NHRP authentication credentials between the spoke and its trusted hub.
  2. Verify the hub's NHRP redirect behavior and spokes' shortcut processing for the phase 3 design.
  3. Update the spoke's NHRP NHS reference and relevant NBMA mapping to the operational hub.
  4. Correct the spoke's configured NHRP next-hop server and registration mapping for the hub.

Explanation

Correct Answer

C:

At the Brookstone distribution branch, the evidence points to a concrete mechanism rather than a generic outage. NHRP messages are targeted at an obsolete next-hop server address even though the underlay works. Update the spoke's NHRP NHS reference and relevant NBMA mapping to the operational hub. Confirm it by checking that the current hub responds to registrations and spoke resolution requests.

Incorrect Answers

A:

This is appropriate for a different routing or network-control issue: NHRP registration messages are rejected because peers do not agree on their authentication secret. The stated evidence at the Brookstone distribution branch instead concerns dmvpn spoke next-hop server address.

B:

This could help where dmvpn phase 3 redirect and shortcut is the issue, but not for the evidence reported at the Brookstone distribution branch. NHRP messages are targeted at an obsolete next-hop server address even though the underlay works.

D:

This is appropriate for a different routing or network-control issue: Underlay IP reachability is present, but the spoke is not registering its tunnel-to-NBMA mapping with the correct NHRP server. The stated evidence at the Brookstone distribution branch instead concerns dmvpn spoke next-hop server address.

Question 97

At the Southridge banking office, DMVPN unicast tunnel traffic reaches the hub but a multicast-dependent dynamic routing neighbor never forms across the tunnel. Which operational change most directly addresses the fault described?

  1. Provide appropriate NHRP multicast mapping or dynamic multicast handling for the hub-spoke design.
  2. Align NHRP authentication credentials between the spoke and its trusted hub.
  3. Verify that NHRP resolves the remote spoke's NBMA address and that direct tunnels are permitted.
  4. Preserve remote spoke tunnel next hops in routing advertisements when using phase 2 direct forwarding.

Explanation

Correct Answer

A:

At the Southridge banking office, the evidence points to a concrete mechanism rather than a generic outage. Dynamic routing multicast is not properly mapped over the nonbroadcast DMVPN transport. Provide appropriate NHRP multicast mapping or dynamic multicast handling for the hub-spoke design. Confirm it by checking that the routing protocol's hello traffic reaches the peer and its tunnel adjacency forms.

Incorrect Answers

B:

This is appropriate for a different routing or network-control issue: NHRP registration messages are rejected because peers do not agree on their authentication secret. The stated evidence at the Southridge banking office instead concerns dmvpn multicast mapping for igp.

C:

This could help where dmvpn spoke-to-spoke nhrp resolution is the issue, but not for the evidence reported at the Southridge banking office. Dynamic routing multicast is not properly mapped over the nonbroadcast DMVPN transport.

D:

That change targets dmvpn phase 2 spoke next-hop preservation, not the reported dmvpn multicast mapping for igp fault at the Southridge banking office. Dynamic routing multicast is not properly mapped over the nonbroadcast DMVPN transport.

Question 98

At the Lakeside transit hub, DMVPN unicast tunnel traffic reaches the hub but a multicast-dependent dynamic routing neighbor never forms across the tunnel. Which operational change most directly addresses the fault described?

  1. Update the spoke's NHRP NHS reference and relevant NBMA mapping to the operational hub.
  2. Correct the spoke's configured NHRP next-hop server and registration mapping for the hub.
  3. Provide appropriate NHRP multicast mapping or dynamic multicast handling for the hub-spoke design.
  4. Set matching NHRP network identifiers on tunnel interfaces participating in the same DMVPN cloud.

Explanation

Correct Answer

C:

The fault at the Lakeside transit hub has a specific cause. Dynamic routing multicast is not properly mapped over the nonbroadcast DMVPN transport. Provide appropriate NHRP multicast mapping or dynamic multicast handling for the hub-spoke design. Confirm success against this result: The routing protocol's hello traffic reaches the peer and its tunnel adjacency forms.

Incorrect Answers

A:

This could help where dmvpn spoke next-hop server address is the issue, but not for the evidence reported at the Lakeside transit hub. Dynamic routing multicast is not properly mapped over the nonbroadcast DMVPN transport.

B:

That change targets dmvpn spoke registration to hub, not the reported dmvpn multicast mapping for igp fault at the Lakeside transit hub. Dynamic routing multicast is not properly mapped over the nonbroadcast DMVPN transport.

D:

This could help where dmvpn nhrp network id mismatch is the issue, but not for the evidence reported at the Lakeside transit hub. Dynamic routing multicast is not properly mapped over the nonbroadcast DMVPN transport.

Question 99

At the Pinecrest freight terminal, spoke traffic to the Port distribution facility still traverses the hub even though the design requires direct dynamic spoke-to-spoke forwarding. Which operational change most directly addresses the fault described?

  1. Align NHRP authentication credentials between the spoke and its trusted hub.
  2. Use an appropriate multipoint GRE tunnel and NHRP resolution for dynamically discovered peers.
  3. Verify that NHRP resolves the remote spoke's NBMA address and that direct tunnels are permitted.
  4. Set matching NHRP network identifiers on tunnel interfaces participating in the same DMVPN cloud.

Explanation

Correct Answer

C:

At the Pinecrest freight terminal, the evidence points to a concrete mechanism rather than a generic outage. The origin spoke has not obtained the peer resolution needed to build an appropriate direct path. Verify that NHRP resolves the remote spoke's NBMA address and that direct tunnels are permitted. Confirm it by checking that NHRP shows the remote spoke's mapping and user traffic can traverse the direct tunnel.

Incorrect Answers

A:

This is appropriate for a different routing or network-control issue: NHRP registration messages are rejected because peers do not agree on their authentication secret. The stated evidence at the Pinecrest freight terminal instead concerns dmvpn spoke-to-spoke nhrp resolution.

B:

This could help where dmvpn mgre endpoint capability is the issue, but not for the evidence reported at the Pinecrest freight terminal. The origin spoke has not obtained the peer resolution needed to build an appropriate direct path.

D:

This is appropriate for a different routing or network-control issue: The NHRP tunnel interfaces are not configured to participate in the same logical NHRP network. The stated evidence at the Pinecrest freight terminal instead concerns dmvpn spoke-to-spoke nhrp resolution.

Question 100

At the Westlake utility network, spoke traffic to the Central grid operations center still traverses the hub even though the design requires direct dynamic spoke-to-spoke forwarding. Which operational change most directly addresses the fault described?

  1. Use an appropriate multipoint GRE tunnel and NHRP resolution for dynamically discovered peers.
  2. Verify that NHRP resolves the remote spoke's NBMA address and that direct tunnels are permitted.
  3. Correct the spoke's configured NHRP next-hop server and registration mapping for the hub.
  4. Verify the hub's NHRP redirect behavior and spokes' shortcut processing for the phase 3 design.

Explanation

Correct Answer

B:

The fault at the Westlake utility network has a specific cause. The origin spoke has not obtained the peer resolution needed to build an appropriate direct path. Verify that NHRP resolves the remote spoke's NBMA address and that direct tunnels are permitted. Confirm success against this result: NHRP shows the remote spoke's mapping and user traffic can traverse the direct tunnel.

Incorrect Answers

A:

That change targets dmvpn mgre endpoint capability, not the reported dmvpn spoke-to-spoke nhrp resolution fault at the Westlake utility network. The origin spoke has not obtained the peer resolution needed to build an appropriate direct path.

C:

This could help where dmvpn spoke registration to hub is the issue, but not for the evidence reported at the Westlake utility network. The origin spoke has not obtained the peer resolution needed to build an appropriate direct path.

D:

That change targets dmvpn phase 3 redirect and shortcut, not the reported dmvpn spoke-to-spoke nhrp resolution fault at the Westlake utility network. The origin spoke has not obtained the peer resolution needed to build an appropriate direct path.