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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 49

Question 480

At the Bluewater clinical network, an MP-BGP VPNv4 route arrives at a PE, but it is absent from the intended customer VRF at the Central imaging hub. After remediation, which observation would most directly demonstrate the intended result?

  1. The egress PE processes the remaining packet or service label correctly with no traffic loss.
  2. Overlapping prefixes remain distinct and only VPNs with matching RT policy import them.
  3. The intended VPN prefix is imported into the correct VRF and not into unrelated VRFs.
  4. A controlled trace shows transport-label switching in the core and VPN-context selection at the egress PE.

Explanation

Correct Answer

C:

The stated result demonstrates that the specific condition at the Bluewater clinical network has been corrected. The intended VPN prefix is imported into the correct VRF and not into unrelated VRFs.

Incorrect Answers

A:

This validates an unrelated control at the Bluewater clinical network: The egress PE processes the remaining packet or service label correctly with no traffic loss. It would not demonstrate correction of vpnv4 route-target mismatch.

B:

That test could pass while the specific fault remains. Overlapping prefixes remain distinct and only VPNs with matching RT policy import them. It would not establish the required outcome for vpnv4 route-target mismatch at the Bluewater clinical network.

D:

This validates an unrelated control at the Bluewater clinical network: A controlled trace shows transport-label switching in the core and VPN-context selection at the egress PE. It would not demonstrate correction of vpnv4 route-target mismatch.

Question 481

At the Harborview media campus, a PE advertises identical customer IPv4 prefixes from separate VPNs; an engineer expects changing only the route distinguisher to control cross-VRF import. After remediation, which observation would most directly demonstrate the intended result?

  1. Overlapping prefixes remain distinct and only VPNs with matching RT policy import them.
  2. The remote FEC has a label binding and a valid label-forwarding entry along the transport path.
  3. The egress PE processes the remaining packet or service label correctly with no traffic loss.
  4. The CE installs the permitted remote subnet with the correct next hop and VRF isolation.

Explanation

Correct Answer

A:

The stated result demonstrates that the specific condition at the Harborview media campus has been corrected. Overlapping prefixes remain distinct and only VPNs with matching RT policy import them.

Incorrect Answers

B:

This validates an unrelated control at the Harborview media campus: The remote FEC has a label binding and a valid label-forwarding entry along the transport path. It would not demonstrate correction of route distinguisher versus route target.

C:

That test could pass while the specific fault remains. The egress PE processes the remaining packet or service label correctly with no traffic loss. It would not establish the required outcome for route distinguisher versus route target at the Harborview media campus.

D:

The result addresses pe to ce route exchange, not the observed fault at the Harborview media campus. The decisive outcome is different: Overlapping prefixes remain distinct and only VPNs with matching RT policy import them.

Question 482

At the Ironwood training campus, a PE advertises identical customer IPv4 prefixes from separate VPNs; an engineer expects changing only the route distinguisher to control cross-VRF import. After remediation, which observation would most directly demonstrate the intended result?

  1. A labeled packet to the customer subnet exits through the correct VRF-associated interface.
  2. The egress PE processes the remaining packet or service label correctly with no traffic loss.
  3. Overlapping prefixes remain distinct and only VPNs with matching RT policy import them.
  4. The intended VPN prefix is imported into the correct VRF and not into unrelated VRFs.

Explanation

Correct Answer

C:

This tests the exact behavior that was failing at the Ironwood training campus. Overlapping prefixes remain distinct and only VPNs with matching RT policy import them. The change supporting that outcome is: Use route targets for import/export policy and reserve route distinguishers for VPNv4 prefix uniqueness.

Incorrect Answers

A:

That test could pass while the specific fault remains. A labeled packet to the customer subnet exits through the correct VRF-associated interface. It would not establish the required outcome for route distinguisher versus route target at the Ironwood training campus.

B:

The result addresses mpls penultimate-hop popping, not the observed fault at the Ironwood training campus. The decisive outcome is different: Overlapping prefixes remain distinct and only VPNs with matching RT policy import them.

D:

That test could pass while the specific fault remains. The intended VPN prefix is imported into the correct VRF and not into unrelated VRFs. It would not establish the required outcome for route distinguisher versus route target at the Ironwood training campus.

Question 483

At the Hillcrest research lab, a PE has the customer's VPNv4 routes in MP-BGP but the attached CE never learns the remote site's subnet. After remediation, which observation would most directly demonstrate the intended result?

  1. The remote FEC has a label binding and a valid label-forwarding entry along the transport path.
  2. The CE installs the permitted remote subnet with the correct next hop and VRF isolation.
  3. Overlapping prefixes remain distinct and only VPNs with matching RT policy import them.
  4. LDP neighbors reach operational state and usable label bindings are visible for the core FECs.

Explanation

Correct Answer

B:

A meaningful acceptance check at the Hillcrest research lab should verify the actual forwarding or control-plane outcome. The CE installs the permitted remote subnet with the correct next hop and VRF isolation.

Incorrect Answers

A:

This validates an unrelated control at the Hillcrest research lab: The remote FEC has a label binding and a valid label-forwarding entry along the transport path. It would not demonstrate correction of pe to ce route exchange.

C:

The result addresses route distinguisher versus route target, not the observed fault at the Hillcrest research lab. The decisive outcome is different: The CE installs the permitted remote subnet with the correct next hop and VRF isolation.

D:

This validates an unrelated control at the Hillcrest research lab: LDP neighbors reach operational state and usable label bindings are visible for the core FECs. It would not demonstrate correction of pe to ce route exchange.

Question 484

At the Northport logistics site, a PE has the customer's VPNv4 routes in MP-BGP but the attached CE never learns the remote site's subnet. After remediation, which observation would most directly demonstrate the intended result?

  1. The remote FEC has a label binding and a valid label-forwarding entry along the transport path.
  2. A controlled trace shows transport-label switching in the core and VPN-context selection at the egress PE.
  3. A labeled packet to the customer subnet exits through the correct VRF-associated interface.
  4. The CE installs the permitted remote subnet with the correct next hop and VRF isolation.

Explanation

Correct Answer

D:

The stated result demonstrates that the specific condition at the Northport logistics site has been corrected. The CE installs the permitted remote subnet with the correct next hop and VRF isolation.

Incorrect Answers

A:

The result addresses mpls unlabelled core hop, not the observed fault at the Northport logistics site. The decisive outcome is different: The CE installs the permitted remote subnet with the correct next hop and VRF isolation.

B:

This validates an unrelated control at the Northport logistics site: A controlled trace shows transport-label switching in the core and VPN-context selection at the egress PE. It would not demonstrate correction of pe to ce route exchange.

C:

That test could pass while the specific fault remains. A labeled packet to the customer subnet exits through the correct VRF-associated interface. It would not establish the required outcome for pe to ce route exchange at the Northport logistics site.

Question 485

At the Elmfield engineering office, an egress PE receives a valid inner VPN label, but customer traffic is forwarded using the wrong route-table expectation. After remediation, which observation would most directly demonstrate the intended result?

  1. The remote FEC has a label binding and a valid label-forwarding entry along the transport path.
  2. A labeled packet to the customer subnet exits through the correct VRF-associated interface.
  3. LDP neighbors reach operational state and usable label bindings are visible for the core FECs.
  4. The CE installs the permitted remote subnet with the correct next hop and VRF isolation.

Explanation

Correct Answer

B:

The stated result demonstrates that the specific condition at the Elmfield engineering office has been corrected. A labeled packet to the customer subnet exits through the correct VRF-associated interface.

Incorrect Answers

A:

That test could pass while the specific fault remains. The remote FEC has a label binding and a valid label-forwarding entry along the transport path. It would not establish the required outcome for mpls vpn per-vrf forwarding lookup at the Elmfield engineering office.

C:

This validates an unrelated control at the Elmfield engineering office: LDP neighbors reach operational state and usable label bindings are visible for the core FECs. It would not demonstrate correction of mpls vpn per-vrf forwarding lookup.

D:

That test could pass while the specific fault remains. The CE installs the permitted remote subnet with the correct next hop and VRF isolation. It would not establish the required outcome for mpls vpn per-vrf forwarding lookup at the Elmfield engineering office.

Question 486

At the Granite manufacturing plant, an egress PE receives a valid inner VPN label, but customer traffic is forwarded using the wrong route-table expectation. After remediation, which observation would most directly demonstrate the intended result?

  1. A labeled packet to the customer subnet exits through the correct VRF-associated interface.
  2. A controlled trace shows transport-label switching in the core and VPN-context selection at the egress PE.
  3. LDP neighbors reach operational state and usable label bindings are visible for the core FECs.
  4. The remote FEC has a label binding and a valid label-forwarding entry along the transport path.

Explanation

Correct Answer

A:

This tests the exact behavior that was failing at the Granite manufacturing plant. A labeled packet to the customer subnet exits through the correct VRF-associated interface. The change supporting that outcome is: Verify that the inner service label selects the intended VPN forwarding context and CE-facing path.

Incorrect Answers

B:

That test could pass while the specific fault remains. A controlled trace shows transport-label switching in the core and VPN-context selection at the egress PE. It would not establish the required outcome for mpls vpn per-vrf forwarding lookup at the Granite manufacturing plant.

C:

The result addresses ldp neighbor state on the core link, not the observed fault at the Granite manufacturing plant. The decisive outcome is different: A labeled packet to the customer subnet exits through the correct VRF-associated interface.

D:

This validates an unrelated control at the Granite manufacturing plant: The remote FEC has a label binding and a valid label-forwarding entry along the transport path. It would not demonstrate correction of mpls vpn per-vrf forwarding lookup.

Question 487

At the Aspen agricultural office, a DMVPN spoke can ping the hub's transport address but its tunnel never appears in the hub NHRP registration table. After remediation, which observation would most directly demonstrate the intended result?

  1. The spoke successfully registers at the hub and the accepted mappings reflect intended peers.
  2. The current hub responds to registrations and spoke resolution requests.
  3. Subsequent eligible traffic uses a dynamically learned shortcut instead of remaining hub-transited.
  4. The hub NHRP cache shows the spoke's tunnel and public address mapping and the tunnel routing neighbor forms.

Explanation

Correct Answer

D:

The stated result demonstrates that the specific condition at the Aspen agricultural office has been corrected. The hub NHRP cache shows the spoke's tunnel and public address mapping and the tunnel routing neighbor forms.

Incorrect Answers

A:

The result addresses dmvpn nhrp authentication mismatch, not the observed fault at the Aspen agricultural office. The decisive outcome is different: The hub NHRP cache shows the spoke's tunnel and public address mapping and the tunnel routing neighbor forms.

B:

This validates an unrelated control at the Aspen agricultural office: The current hub responds to registrations and spoke resolution requests. It would not demonstrate correction of dmvpn spoke registration to hub.

C:

That test could pass while the specific fault remains. Subsequent eligible traffic uses a dynamically learned shortcut instead of remaining hub-transited. It would not establish the required outcome for dmvpn spoke registration to hub at the Aspen agricultural office.

Question 488

At the Oakbridge insurance office, a DMVPN spoke can ping the hub's transport address but its tunnel never appears in the hub NHRP registration table. After remediation, which observation would most directly demonstrate the intended result?

  1. The hub NHRP cache shows the spoke's tunnel and public address mapping and the tunnel routing neighbor forms.
  2. The spoke successfully registers at the hub and the accepted mappings reflect intended peers.
  3. NHRP shows the remote spoke's mapping and user traffic can traverse the direct tunnel.
  4. Remote branch routes retain the spoke next hop and direct NHRP resolution succeeds.

Explanation

Correct Answer

A:

A meaningful acceptance check at the Oakbridge insurance office should verify the actual forwarding or control-plane outcome. The hub NHRP cache shows the spoke's tunnel and public address mapping and the tunnel routing neighbor forms.

Incorrect Answers

B:

The result addresses dmvpn nhrp authentication mismatch, not the observed fault at the Oakbridge insurance office. The decisive outcome is different: The hub NHRP cache shows the spoke's tunnel and public address mapping and the tunnel routing neighbor forms.

C:

This validates an unrelated control at the Oakbridge insurance office: NHRP shows the remote spoke's mapping and user traffic can traverse the direct tunnel. It would not demonstrate correction of dmvpn spoke registration to hub.

D:

That test could pass while the specific fault remains. Remote branch routes retain the spoke next hop and direct NHRP resolution succeeds. It would not establish the required outcome for dmvpn spoke registration to hub at the Oakbridge insurance office.

Question 489

At the Redwood medical campus, two DMVPN devices share a reachable underlay yet their NHRP configuration reports incompatible network identifiers. After remediation, which observation would most directly demonstrate the intended result?

  1. NHRP registration and resolution succeed in the intended cloud without joining a separate cloud.
  2. The spoke successfully registers at the hub and the accepted mappings reflect intended peers.
  3. The hub NHRP cache shows the spoke's tunnel and public address mapping and the tunnel routing neighbor forms.
  4. NHRP shows the remote spoke's mapping and user traffic can traverse the direct tunnel.

Explanation

Correct Answer

A:

This tests the exact behavior that was failing at the Redwood medical campus. NHRP registration and resolution succeed in the intended cloud without joining a separate cloud. The change supporting that outcome is: Set matching NHRP network identifiers on tunnel interfaces participating in the same DMVPN cloud.

Incorrect Answers

B:

That test could pass while the specific fault remains. The spoke successfully registers at the hub and the accepted mappings reflect intended peers. It would not establish the required outcome for dmvpn nhrp network id mismatch at the Redwood medical campus.

C:

The result addresses dmvpn spoke registration to hub, not the observed fault at the Redwood medical campus. The decisive outcome is different: NHRP registration and resolution succeed in the intended cloud without joining a separate cloud.

D:

This validates an unrelated control at the Redwood medical campus: NHRP shows the remote spoke's mapping and user traffic can traverse the direct tunnel. It would not demonstrate correction of dmvpn nhrp network id mismatch.

Question 490

At the Cedarbrook hospital, two DMVPN devices share a reachable underlay yet their NHRP configuration reports incompatible network identifiers. After remediation, which observation would most directly demonstrate the intended result?

  1. NHRP registration and resolution succeed in the intended cloud without joining a separate cloud.
  2. The same tunnel interface can resolve and reach approved dynamic spoke peers.
  3. NHRP shows the remote spoke's mapping and user traffic can traverse the direct tunnel.
  4. Remote branch routes retain the spoke next hop and direct NHRP resolution succeeds.

Explanation

Correct Answer

A:

The stated result demonstrates that the specific condition at the Cedarbrook hospital has been corrected. NHRP registration and resolution succeed in the intended cloud without joining a separate cloud.

Incorrect Answers

B:

This validates an unrelated control at the Cedarbrook hospital: The same tunnel interface can resolve and reach approved dynamic spoke peers. It would not demonstrate correction of dmvpn nhrp network id mismatch.

C:

That test could pass while the specific fault remains. NHRP shows the remote spoke's mapping and user traffic can traverse the direct tunnel. It would not establish the required outcome for dmvpn nhrp network id mismatch at the Cedarbrook hospital.

D:

The result addresses dmvpn phase 2 spoke next-hop preservation, not the observed fault at the Cedarbrook hospital. The decisive outcome is different: NHRP registration and resolution succeed in the intended cloud without joining a separate cloud.