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HP HPE7-A01 Practice Test 48

Question 470

A campus WAN BGP peer never reaches Established because local and remote neighbor AS values differ after migration. After the root cause is confirmed, which narrowly scoped configuration action should be selected?

  1. Repair the configured neighbor AS or intended local routing instance under the approved peering agreement.
  2. Constrain outbound BGP advertisement to approved prefixes and route-map matches for that peer for the affected campus deployment.
  3. Establish the narrow approved inter-VLAN permit or deny rule on the appropriate routed interface.
  4. Reinstate valid IPv6 neighbor discovery behavior and approved gateway addressing while retaining required ICMPv6 control traffic.

Explanation

Correct Answer

A:

Repair the configured neighbor AS or intended local routing instance under the approved peering agreement. BGP peering requires correctly matched autonomous-system expectations and a reachable session path; routes cannot exchange without a valid peer. The proposed configuration targets the stated dependency without broadening unrelated access. The decision applies to the described bgp neighbor asn and tcp session situation.

Incorrect Answers

B:

Constrain outbound BGP advertisement to approved prefixes and route-map matches for that peer for the affected campus deployment. This instead concerns bgp prefix filtering outbound. BGP route advertisements require explicit filtering because a functioning neighbor session does not prove prefix-sharing authorization. It would not implement the specifically required change. The immediate problem concerns bgp neighbor asn and tcp session.

C:

Establish the narrow approved inter-VLAN permit or deny rule on the appropriate routed interface. This instead concerns inter-vlan routing and acl scope. Inter-VLAN routing depends on both Layer 3 reachability and filtering; a connected gateway cannot override an explicit ACL denial. It would not implement the specifically required change. The immediate problem concerns bgp neighbor asn and tcp session.

D:

Reinstate valid IPv6 neighbor discovery behavior and approved gateway addressing while retaining required ICMPv6 control traffic. This instead concerns ipv6 neighbor discovery and gateway reachability. IPv6 Neighbor Discovery replaces ARP for address resolution and requires particular ICMPv6 messages; overfiltering them blocks connectivity. It would not implement the specifically required change. The immediate problem concerns bgp neighbor asn and tcp session.

Question 471

A campus WAN BGP peer never reaches Established because local and remote neighbor AS values differ after migration. The review requires TWO complementary actions: one diagnostic check and one controlled configuration remedy. Select TWO actions that together meet those requirements.

  1. Review advertised-routes output, prefix-list or route-map matches and the exact remote peer policy.
  2. Review BGP peer IP reachability, local and remote AS configuration and session error state.
  3. Establish the narrow approved inter-VLAN permit or deny rule on the appropriate routed interface.
  4. Repair the configured neighbor AS or intended local routing instance under the approved peering agreement.

Explanation

Correct Answers

B:

Review BGP peer IP reachability, local and remote AS configuration and session error state. BGP peering requires correctly matched autonomous-system expectations and a reachable session path; routes cannot exchange without a valid peer. This is the required diagnosis or controlled remedy; the other keyed action supplies the complementary role. The decision applies to the described bgp neighbor asn and tcp session situation.

D:

Repair the configured neighbor AS or intended local routing instance under the approved peering agreement. BGP peering requires correctly matched autonomous-system expectations and a reachable session path; routes cannot exchange without a valid peer. This is the required diagnosis or controlled remedy; the other keyed action supplies the complementary role. The decision applies to the described bgp neighbor asn and tcp session situation.

Incorrect Answers

A:

Review advertised-routes output, prefix-list or route-map matches and the exact remote peer policy. This instead concerns bgp prefix filtering outbound. BGP route advertisements require explicit filtering because a functioning neighbor session does not prove prefix-sharing authorization. It is not one of the requested paired diagnosis and configuration actions. The immediate problem concerns bgp neighbor asn and tcp session.

C:

Establish the narrow approved inter-VLAN permit or deny rule on the appropriate routed interface. This instead concerns inter-vlan routing and acl scope. Inter-VLAN routing depends on both Layer 3 reachability and filtering; a connected gateway cannot override an explicit ACL denial. It is not one of the requested paired diagnosis and configuration actions. The immediate problem concerns bgp neighbor asn and tcp session.

Question 472

A campus WAN BGP peer never reaches Established because local and remote neighbor AS values differ after migration. If the revised setting disrupts users, which controlled rollback would be most relevant?

  1. Reinstate the previously approved outbound policy and withdraw unintended routes to prevent continued leakage.
  2. Restore the earlier least-privilege ACL and SVI policy if the adjustment expands access beyond scope.
  3. Reinstate the previous valid ASN and peer address if the revised neighbor relationship cannot establish.
  4. Return to the known-good IPv6 gateway and filtering configuration if the change breaks NDP.

Explanation

Correct Answer

C:

Reinstate the previous valid ASN and peer address if the revised neighbor relationship cannot establish. BGP peering requires correctly matched autonomous-system expectations and a reachable session path; routes cannot exchange without a valid peer. The focused rollback restores a known safe baseline before another change attempt. The decision applies to the described bgp neighbor asn and tcp session situation.

Incorrect Answers

A:

Reinstate the previously approved outbound policy and withdraw unintended routes to prevent continued leakage. This instead concerns bgp prefix filtering outbound. BGP route advertisements require explicit filtering because a functioning neighbor session does not prove prefix-sharing authorization. It would not safely roll back the relevant failed change. The immediate problem concerns bgp neighbor asn and tcp session.

B:

Restore the earlier least-privilege ACL and SVI policy if the adjustment expands access beyond scope. This instead concerns inter-vlan routing and acl scope. Inter-VLAN routing depends on both Layer 3 reachability and filtering; a connected gateway cannot override an explicit ACL denial. It would not safely roll back the relevant failed change. The immediate problem concerns bgp neighbor asn and tcp session.

D:

Return to the known-good IPv6 gateway and filtering configuration if the change breaks NDP. This instead concerns ipv6 neighbor discovery and gateway reachability. IPv6 Neighbor Discovery replaces ARP for address resolution and requires particular ICMPv6 messages; overfiltering them blocks connectivity. It would not safely roll back the relevant failed change. The immediate problem concerns bgp neighbor asn and tcp session. For the incident in this item: A campus WAN BGP peer never reaches Established because local and remote neighbor AS values differ after migration.

Question 473

A campus boundary accidentally advertises internal lab prefixes to an external BGP peer after a policy change. Which investigation would best isolate the immediate network dependency?

  1. Inspect source and destination SVIs, VRFs, route lookup and the precise ACL rule matching sample traffic.
  2. Inspect ICMPv6 neighbor solicitation and advertisement exchange, interface reachability and neighbor cache state.
  3. Inspect advertised-routes output, prefix-list or route-map matches and the exact remote peer policy.
  4. Inspect route policy match order, source and destination selectors, configured next hop and fallback behavior.

Explanation

Correct Answer

C:

Inspect advertised-routes output, prefix-list or route-map matches and the exact remote peer policy. BGP route advertisements require explicit filtering because a functioning neighbor session does not prove prefix-sharing authorization. The evidence check isolates the relevant prerequisite before a disruptive change. The decision applies to the described bgp prefix filtering outbound situation.

Incorrect Answers

A:

Inspect source and destination SVIs, VRFs, route lookup and the precise ACL rule matching sample traffic. This instead concerns inter-vlan routing and acl scope. Inter-VLAN routing depends on both Layer 3 reachability and filtering; a connected gateway cannot override an explicit ACL denial. It does not isolate the cause of the stated incident. The immediate problem concerns bgp prefix filtering outbound.

B:

Inspect ICMPv6 neighbor solicitation and advertisement exchange, interface reachability and neighbor cache state. This instead concerns ipv6 neighbor discovery and gateway reachability. IPv6 Neighbor Discovery replaces ARP for address resolution and requires particular ICMPv6 messages; overfiltering them blocks connectivity. It does not isolate the cause of the stated incident. The immediate problem concerns bgp prefix filtering outbound.

D:

Inspect route policy match order, source and destination selectors, configured next hop and fallback behavior. This instead concerns policy-based routing exception. Policy routing can override ordinary destination-based decisions for explicitly matched traffic; overly broad matches cause path surprises. It does not isolate the cause of the stated incident. The immediate problem concerns bgp prefix filtering outbound.

Question 474

A campus boundary accidentally advertises internal lab prefixes to an external BGP peer after a policy change. Which specific corrective design step best meets the stated campus requirement?

  1. Create the narrow approved inter-VLAN permit or deny rule on the appropriate routed interface.
  2. Constrain outbound BGP advertisement to approved prefixes and route-map matches for that peer.
  3. Restore valid IPv6 neighbor discovery behavior and approved gateway addressing while retaining required ICMPv6 control traffic.
  4. Apply tightly scoped policy-based routing for authorized traffic while retaining correct ordinary routing for other hosts.

Explanation

Correct Answer

B:

Constrain outbound BGP advertisement to approved prefixes and route-map matches for that peer. BGP route advertisements require explicit filtering because a functioning neighbor session does not prove prefix-sharing authorization. The proposed configuration targets the stated dependency without broadening unrelated access. The decision applies to the described bgp prefix filtering outbound situation.

Incorrect Answers

A:

Create the narrow approved inter-VLAN permit or deny rule on the appropriate routed interface. This instead concerns inter-vlan routing and acl scope. Inter-VLAN routing depends on both Layer 3 reachability and filtering; a connected gateway cannot override an explicit ACL denial. It would not implement the specifically required change. The immediate problem concerns bgp prefix filtering outbound.

C:

Restore valid IPv6 neighbor discovery behavior and approved gateway addressing while retaining required ICMPv6 control traffic. This instead concerns ipv6 neighbor discovery and gateway reachability. IPv6 Neighbor Discovery replaces ARP for address resolution and requires particular ICMPv6 messages; overfiltering them blocks connectivity. It would not implement the specifically required change. The immediate problem concerns bgp prefix filtering outbound.

D:

Apply tightly scoped policy-based routing for authorized traffic while retaining correct ordinary routing for other hosts. This instead concerns policy-based routing exception. Policy routing can override ordinary destination-based decisions for explicitly matched traffic; overly broad matches cause path surprises. It would not implement the specifically required change. The immediate problem concerns bgp prefix filtering outbound.

Question 475

A campus boundary accidentally advertises internal lab prefixes to an external BGP peer after a policy change. Following a targeted change, which acceptance test would most directly demonstrate success?

  1. Verify permitted routes are advertised while restricted lab or private prefixes disappear from the peer view.
  2. Confirm permitted client traffic succeeds and negative tests to restricted subnets remain blocked.
  3. Verify neighbor resolution and successful approved IPv6 connectivity after clearing only the affected stale entry.
  4. Confirm selected test flows take the policy path and unmatched traffic follows the standard routing table.

Explanation

Correct Answer

A:

Verify permitted routes are advertised while restricted lab or private prefixes disappear from the peer view. BGP route advertisements require explicit filtering because a functioning neighbor session does not prove prefix-sharing authorization. The result tests actual working behavior, not merely a saved configuration. The decision applies to the described bgp prefix filtering outbound situation.

Incorrect Answers

B:

Confirm permitted client traffic succeeds and negative tests to restricted subnets remain blocked. This instead concerns inter-vlan routing and acl scope. Inter-VLAN routing depends on both Layer 3 reachability and filtering; a connected gateway cannot override an explicit ACL denial. It would not establish that this function actually works. The immediate problem concerns bgp prefix filtering outbound.

C:

Verify neighbor resolution and successful approved IPv6 connectivity after clearing only the affected stale entry. This instead concerns ipv6 neighbor discovery and gateway reachability. IPv6 Neighbor Discovery replaces ARP for address resolution and requires particular ICMPv6 messages; overfiltering them blocks connectivity. It would not establish that this function actually works. The immediate problem concerns bgp prefix filtering outbound.

D:

Confirm selected test flows take the policy path and unmatched traffic follows the standard routing table. This instead concerns policy-based routing exception. Policy routing can override ordinary destination-based decisions for explicitly matched traffic; overly broad matches cause path surprises. It would not establish that this function actually works. The immediate problem concerns bgp prefix filtering outbound.

Question 476

A campus boundary accidentally advertises internal lab prefixes to an external BGP peer after a policy change. The change fails acceptance. What is the safest targeted restoration action?

  1. Reinstate the earlier least-privilege ACL and SVI policy if the adjustment expands access beyond scope.
  2. Return to the known-good IPv6 gateway and filtering configuration if the change breaks NDP.
  3. Remove or revert the overly broad policy route and restore normal forwarding until its selectors are corrected.
  4. Restore the previously approved outbound policy and withdraw unintended routes to prevent continued leakage.

Explanation

Correct Answer

D:

Restore the previously approved outbound policy and withdraw unintended routes to prevent continued leakage. BGP route advertisements require explicit filtering because a functioning neighbor session does not prove prefix-sharing authorization. The focused rollback restores a known safe baseline before another change attempt. The decision applies to the described bgp prefix filtering outbound situation.

Incorrect Answers

A:

Reinstate the earlier least-privilege ACL and SVI policy if the adjustment expands access beyond scope. This instead concerns inter-vlan routing and acl scope. Inter-VLAN routing depends on both Layer 3 reachability and filtering; a connected gateway cannot override an explicit ACL denial. It would not safely roll back the relevant failed change. The immediate problem concerns bgp prefix filtering outbound.

B:

Return to the known-good IPv6 gateway and filtering configuration if the change breaks NDP. This instead concerns ipv6 neighbor discovery and gateway reachability. IPv6 Neighbor Discovery replaces ARP for address resolution and requires particular ICMPv6 messages; overfiltering them blocks connectivity. It would not safely roll back the relevant failed change. The immediate problem concerns bgp prefix filtering outbound.

C:

Remove or revert the overly broad policy route and restore normal forwarding until its selectors are corrected. This instead concerns policy-based routing exception. Policy routing can override ordinary destination-based decisions for explicitly matched traffic; overly broad matches cause path surprises. It would not safely roll back the relevant failed change. The immediate problem concerns bgp prefix filtering outbound.

Question 477

A managed WAN neighbor receives too many campus routes because an outbound route-map now permits the wrong prefix set. Before implementing a remedy, what should the engineer check first?

  1. Review source and destination SVIs, VRFs, route lookup and the precise ACL rule matching sample traffic.
  2. Review ICMPv6 neighbor solicitation and advertisement exchange, interface reachability and neighbor cache state.
  3. Review advertised-routes output, prefix-list or route-map matches and the exact remote peer policy.
  4. Review route policy match order, source and destination selectors, configured next hop and fallback behavior.

Explanation

Correct Answer

C:

Review advertised-routes output, prefix-list or route-map matches and the exact remote peer policy. BGP route advertisements require explicit filtering because a functioning neighbor session does not prove prefix-sharing authorization. The evidence check isolates the relevant prerequisite before a disruptive change. The decision applies to the described bgp prefix filtering outbound situation.

Incorrect Answers

A:

Review source and destination SVIs, VRFs, route lookup and the precise ACL rule matching sample traffic. This instead concerns inter-vlan routing and acl scope. Inter-VLAN routing depends on both Layer 3 reachability and filtering; a connected gateway cannot override an explicit ACL denial. It does not isolate the cause of the stated incident. The immediate problem concerns bgp prefix filtering outbound.

B:

Review ICMPv6 neighbor solicitation and advertisement exchange, interface reachability and neighbor cache state. This instead concerns ipv6 neighbor discovery and gateway reachability. IPv6 Neighbor Discovery replaces ARP for address resolution and requires particular ICMPv6 messages; overfiltering them blocks connectivity. It does not isolate the cause of the stated incident. The immediate problem concerns bgp prefix filtering outbound.

D:

Review route policy match order, source and destination selectors, configured next hop and fallback behavior. This instead concerns policy-based routing exception. Policy routing can override ordinary destination-based decisions for explicitly matched traffic; overly broad matches cause path surprises. It does not isolate the cause of the stated incident. The immediate problem concerns bgp prefix filtering outbound.

Question 478

A managed WAN neighbor receives too many campus routes because an outbound route-map now permits the wrong prefix set. The review requires TWO complementary actions: one diagnostic check and one controlled configuration remedy. Select TWO actions that together meet those requirements.

  1. Review source and destination SVIs, VRFs, route lookup and the precise ACL rule matching sample traffic.
  2. Review advertised-routes output, prefix-list or route-map matches and the exact remote peer policy.
  3. Reinstate valid IPv6 neighbor discovery behavior and approved gateway addressing while retaining required ICMPv6 control traffic.
  4. Constrain outbound BGP advertisement to approved prefixes and route-map matches for that peer for the affected campus deployment.

Explanation

Correct Answers

B:

Review advertised-routes output, prefix-list or route-map matches and the exact remote peer policy. BGP route advertisements require explicit filtering because a functioning neighbor session does not prove prefix-sharing authorization. This is the required diagnosis or controlled remedy; the other keyed action supplies the complementary role. The decision applies to the described bgp prefix filtering outbound situation.

D:

Constrain outbound BGP advertisement to approved prefixes and route-map matches for that peer for the affected campus deployment. BGP route advertisements require explicit filtering because a functioning neighbor session does not prove prefix-sharing authorization. This is the required diagnosis or controlled remedy; the other keyed action supplies the complementary role. The decision applies to the described bgp prefix filtering outbound situation.

Incorrect Answers

A:

Review source and destination SVIs, VRFs, route lookup and the precise ACL rule matching sample traffic. This instead concerns inter-vlan routing and acl scope. Inter-VLAN routing depends on both Layer 3 reachability and filtering; a connected gateway cannot override an explicit ACL denial. It is not one of the requested paired diagnosis and configuration actions. The immediate problem concerns bgp prefix filtering outbound.

C:

Reinstate valid IPv6 neighbor discovery behavior and approved gateway addressing while retaining required ICMPv6 control traffic. This instead concerns ipv6 neighbor discovery and gateway reachability. IPv6 Neighbor Discovery replaces ARP for address resolution and requires particular ICMPv6 messages; overfiltering them blocks connectivity. It is not one of the requested paired diagnosis and configuration actions. The immediate problem concerns bgp prefix filtering outbound.

Question 479

A managed WAN neighbor receives too many campus routes because an outbound route-map now permits the wrong prefix set. A deployment job reports success. Which observed result would actually validate the affected service?

  1. Confirm permitted routes are advertised while restricted lab or private prefixes disappear from the peer view.
  2. Verify permitted client traffic succeeds and negative tests to restricted subnets remain blocked.
  3. Confirm neighbor resolution and successful approved IPv6 connectivity after clearing only the affected stale entry.
  4. Verify selected test flows take the policy path and unmatched traffic follows the standard routing table.

Explanation

Correct Answer

A:

Confirm permitted routes are advertised while restricted lab or private prefixes disappear from the peer view. BGP route advertisements require explicit filtering because a functioning neighbor session does not prove prefix-sharing authorization. The result tests actual working behavior, not merely a saved configuration. The decision applies to the described bgp prefix filtering outbound situation.

Incorrect Answers

B:

Verify permitted client traffic succeeds and negative tests to restricted subnets remain blocked. This instead concerns inter-vlan routing and acl scope. Inter-VLAN routing depends on both Layer 3 reachability and filtering; a connected gateway cannot override an explicit ACL denial. It would not establish that this function actually works. The immediate problem concerns bgp prefix filtering outbound.

C:

Confirm neighbor resolution and successful approved IPv6 connectivity after clearing only the affected stale entry. This instead concerns ipv6 neighbor discovery and gateway reachability. IPv6 Neighbor Discovery replaces ARP for address resolution and requires particular ICMPv6 messages; overfiltering them blocks connectivity. It would not establish that this function actually works. The immediate problem concerns bgp prefix filtering outbound.

D:

Verify selected test flows take the policy path and unmatched traffic follows the standard routing table. This instead concerns policy-based routing exception. Policy routing can override ordinary destination-based decisions for explicitly matched traffic; overly broad matches cause path surprises. It would not establish that this function actually works. The immediate problem concerns bgp prefix filtering outbound.

Question 480

A managed WAN neighbor receives too many campus routes because an outbound route-map now permits the wrong prefix set. If the revised setting disrupts users, which controlled rollback would be most relevant?

  1. Restore the earlier least-privilege ACL and SVI policy if the adjustment expands access beyond scope.
  2. Return to the known-good IPv6 gateway and filtering configuration if the change breaks NDP.
  3. Eliminate or revert the overly broad policy route and restore normal forwarding until its selectors are corrected.
  4. Reinstate the previously approved outbound policy and withdraw unintended routes to prevent continued leakage.

Explanation

Correct Answer

D:

Reinstate the previously approved outbound policy and withdraw unintended routes to prevent continued leakage. BGP route advertisements require explicit filtering because a functioning neighbor session does not prove prefix-sharing authorization. The focused rollback restores a known safe baseline before another change attempt. The decision applies to the described bgp prefix filtering outbound situation.

Incorrect Answers

A:

Restore the earlier least-privilege ACL and SVI policy if the adjustment expands access beyond scope. This instead concerns inter-vlan routing and acl scope. Inter-VLAN routing depends on both Layer 3 reachability and filtering; a connected gateway cannot override an explicit ACL denial. It would not safely roll back the relevant failed change. The immediate problem concerns bgp prefix filtering outbound.

B:

Return to the known-good IPv6 gateway and filtering configuration if the change breaks NDP. This instead concerns ipv6 neighbor discovery and gateway reachability. IPv6 Neighbor Discovery replaces ARP for address resolution and requires particular ICMPv6 messages; overfiltering them blocks connectivity. It would not safely roll back the relevant failed change. The immediate problem concerns bgp prefix filtering outbound. For the incident in this item: A managed WAN neighbor receives too many campus routes because an outbound route-map now permits the wrong prefix set.

C:

Eliminate or revert the overly broad policy route and restore normal forwarding until its selectors are corrected. This instead concerns policy-based routing exception. Policy routing can override ordinary destination-based decisions for explicitly matched traffic; overly broad matches cause path surprises. It would not safely roll back the relevant failed change. The immediate problem concerns bgp prefix filtering outbound.

HPE Network Campus Access Professional (HPE7-A01) Practice Tests