HP HPE7-A08 Practice Test 23

Question 220

An HPE Aruba Networking design review examines: Two aggregation switches use VSX, but a downstream dual-homed LAG drops on peer failure. Which technical principle BEST explains the required approach?

Spanning-tree control is required when redundant bridged links can form loops
VSX multi-chassis LAG operation depends on peer and downstream consistency
LACP negotiation and member consistency determine usable bundle capacity
A trunk forwards only VLANs permitted by its effective membership

Explanation

Correct Answer

VSX multi-chassis LAG operation depends on peer and downstream consistency. The case therefore calls for this specifically controlled action: configure the VSX LAG consistently on supported peers and validate the ISL and keepalive paths. The acceptance evidence is that the downstream device keeps connectivity through the surviving peer.

Incorrect Answers

This principle choice fits a different situation: Two access layers see periodic Layer 2 loops after a redundant cable is installed. It does not resolve the stated failure mode. For this case, the decisive principle choice is to vSX multi-chassis LAG operation depends on peer and downstream consistency.

This principle choice fits a different situation: A link aggregation group contains two ports but only one member forwards traffic. It does not resolve the stated failure mode. For this case, the decisive principle choice is to vSX multi-chassis LAG operation depends on peer and downstream consistency.

This principle choice fits a different situation: Two switches must exchange VLAN 20 and VLAN 30 but a user in VLAN 30 cannot cross the uplink. It does not resolve the stated failure mode. For this case, the decisive principle choice is to vSX multi-chassis LAG operation depends on peer and downstream consistency.

Question 221

A risk review for the following wired-network case asks what should be avoided: Two aggregation switches use VSX, but a downstream dual-homed LAG drops on peer failure. Which assumption creates the GREATEST implementation risk?

Treating a VSF stack as two independent VSX control planes
Assuming a VLAN created locally automatically appears on every uplink
Disabling STP to make every link forward simultaneously
Enabling independent unrelated LACP groups and calling them a VSX LAG

Explanation

Correct Answer

Enabling independent unrelated LACP groups and calling them a VSX LAG. That shortcut fails because vSX multi-chassis LAG operation depends on peer and downstream consistency. Instead, the appropriate approach is to configure the VSX LAG consistently on supported peers and validate the ISL and keepalive paths.

Incorrect Answers

This misconception choice fits a different situation: A department wants multiple 6300 access switches to behave as one manageable stack. It does not resolve the stated failure mode. For this case, the decisive misconception choice is to enabling independent unrelated LACP groups and calling them a VSX LAG.

This misconception choice fits a different situation: Two switches must exchange VLAN 20 and VLAN 30 but a user in VLAN 30 cannot cross the uplink. It does not resolve the stated failure mode. For this case, the decisive misconception choice is to enabling independent unrelated LACP groups and calling them a VSX LAG.

This misconception choice fits a different situation: Two access layers see periodic Layer 2 loops after a redundant cable is installed. It does not resolve the stated failure mode. For this case, the decisive misconception choice is to enabling independent unrelated LACP groups and calling them a VSX LAG.

Question 222

Before changing switch configuration, an engineer investigates: Two aggregation switches use VSX, but a downstream dual-homed LAG drops on peer failure. Which FIRST check is most useful for isolating the cause?

Inspect interface VLAN mode, allowed list and MAC learning
Inspect peer state, VSX synchronization and LACP status on both sides
Inspect VSF member states, stack links and role election
Inspect LACP actor and partner data, member status and port settings

Explanation

Correct Answer

Inspect peer state, VSX synchronization and LACP status on both sides. This first check isolates the relevant mechanism without an untested configuration change. It tests the rule that vSX multi-chassis LAG operation depends on peer and downstream consistency.

Incorrect Answers

This diagnostic choice fits a different situation: Two switches must exchange VLAN 20 and VLAN 30 but a user in VLAN 30 cannot cross the uplink. It does not resolve the stated failure mode. For this case, the decisive diagnostic choice is to inspect peer state, VSX synchronization and LACP status on both sides.

This diagnostic choice fits a different situation: A department wants multiple 6300 access switches to behave as one manageable stack. It does not resolve the stated failure mode. For this case, the decisive diagnostic choice is to inspect peer state, VSX synchronization and LACP status on both sides.

This diagnostic choice fits a different situation: A link aggregation group contains two ports but only one member forwards traffic. It does not resolve the stated failure mode. For this case, the decisive diagnostic choice is to inspect peer state, VSX synchronization and LACP status on both sides.

Question 223

An implementation change is planned for: Two aggregation switches use VSX, but a downstream dual-homed LAG drops on peer failure. Which preventive control BEST reduces unnecessary outage and security risk?

Plan standby member placement and isolated stacking paths
Define root priorities and test topology changes before production
Use documented matched speed and trunk policy for the bundle
Stage a failover test with independent peer paths

Explanation

Correct Answer

Stage a failover test with independent peer paths. This safeguard is appropriate before the change to configure the VSX LAG consistently on supported peers and validate the ISL and keepalive paths; it reduces exposure to the mistake of enabling independent unrelated LACP groups and calling them a VSX LAG.

Incorrect Answers

This prevention choice fits a different situation: A department wants multiple 6300 access switches to behave as one manageable stack. It does not resolve the stated failure mode. For this case, the decisive prevention choice is to stage a failover test with independent peer paths.

This prevention choice fits a different situation: Two access layers see periodic Layer 2 loops after a redundant cable is installed. It does not resolve the stated failure mode. For this case, the decisive prevention choice is to stage a failover test with independent peer paths.

This prevention choice fits a different situation: A link aggregation group contains two ports but only one member forwards traffic. It does not resolve the stated failure mode. For this case, the decisive prevention choice is to stage a failover test with independent peer paths.

Question 224

A first repair attempt for this situation failed: Two aggregation switches use VSX, but a downstream dual-homed LAG drops on peer failure. The review found the mistaken approach of enabling independent unrelated LACP groups and calling them a VSX LAG. Which targeted recovery action BEST restores the intended design?

Remove the incompatible member, align both peers and rejoin it
Add only required VLAN 30 membership and verify both ends
Correct the VSX configuration and resynchronize before retesting failover
Correct MST region inconsistency and restore a loop-free topology

Explanation

Correct Answer

Correct the VSX configuration and resynchronize before retesting failover. This addresses the observed risk rather than hiding its symptoms. Confirm the repair when the downstream device keeps connectivity through the surviving peer.

Incorrect Answers

This remediation choice fits a different situation: A link aggregation group contains two ports but only one member forwards traffic. It does not resolve the stated failure mode. For this case, the decisive remediation choice is to correct the VSX configuration and resynchronize before retesting failover.

This remediation choice fits a different situation: Two switches must exchange VLAN 20 and VLAN 30 but a user in VLAN 30 cannot cross the uplink. It does not resolve the stated failure mode. For this case, the decisive remediation choice is to correct the VSX configuration and resynchronize before retesting failover.

This remediation choice fits a different situation: Two access layers see periodic Layer 2 loops after a redundant cable is installed. It does not resolve the stated failure mode. For this case, the decisive remediation choice is to correct the VSX configuration and resynchronize before retesting failover.

Question 225

An HPE Aruba Networking engineer faces this wired-network scenario: Hosts in two routed VLANs cannot communicate even though each VLAN has local connectivity. Which implementation action BEST addresses the requirement?

Match compatible OSPF interfaces, area assignment and authentication settings
Configure a supported VRRP group with consistent virtual gateway and priorities
Configure DHCP relay on the appropriate routed interface toward the authorized server
Configure the appropriate VLAN SVIs, routed addressing and inter-VLAN routes on the capable switch

Explanation

Correct Answer

Layer 3 routing requires valid interfaces and reachable reverse paths. The targeted implementation is to configure the appropriate VLAN SVIs, routed addressing and inter-VLAN routes on the capable switch. The deployment succeeds when hosts reach the permitted opposite-subnet gateway and return traffic.

Incorrect Answers

This implementation choice fits a different situation: Two routing switches have configured OSPF but fail to form an adjacency. It does not resolve the stated failure mode. For this case, the decisive implementation choice is to configure the appropriate VLAN SVIs, routed addressing and inter-VLAN routes on the capable switch.

This implementation choice fits a different situation: Two gateway switches should provide first-hop redundancy for one user VLAN. It does not resolve the stated failure mode. For this case, the decisive implementation choice is to configure the appropriate VLAN SVIs, routed addressing and inter-VLAN routes on the capable switch.

This implementation choice fits a different situation: A client VLAN needs addresses from a DHCP server in another routed subnet. It does not resolve the stated failure mode. For this case, the decisive implementation choice is to configure the appropriate VLAN SVIs, routed addressing and inter-VLAN routes on the capable switch.

Question 226

After implementing the approved change — Configure the appropriate VLAN SVIs, routed addressing and inter-VLAN routes on the capable switch — for this scenario: Hosts in two routed VLANs cannot communicate even though each VLAN has local connectivity. Which observed result BEST verifies the outcome?

Client requests reach the server and return leases with correct subnet settings
Hosts reach the permitted opposite-subnet gateway and return traffic
The approved destination is reachable only from the intended VRF
Clients retain virtual-gateway reachability after an approved master failure

Explanation

Correct Answer

Hosts reach the permitted opposite-subnet gateway and return traffic. This is the observable acceptance evidence for the decision to configure the appropriate VLAN SVIs, routed addressing and inter-VLAN routes on the capable switch. It demonstrates the principle that layer 3 routing requires valid interfaces and reachable reverse paths.

Incorrect Answers

This verification choice fits a different situation: A client VLAN needs addresses from a DHCP server in another routed subnet. It does not resolve the stated failure mode. For this case, the decisive verification choice is to hosts reach the permitted opposite-subnet gateway and return traffic.

This verification choice fits a different situation: An isolated branch VRF lacks a route to the headquarters application. It does not resolve the stated failure mode. For this case, the decisive verification choice is to hosts reach the permitted opposite-subnet gateway and return traffic.

This verification choice fits a different situation: Two gateway switches should provide first-hop redundancy for one user VLAN. It does not resolve the stated failure mode. For this case, the decisive verification choice is to hosts reach the permitted opposite-subnet gateway and return traffic.

Question 227

An HPE Aruba Networking design review examines: Hosts in two routed VLANs cannot communicate even though each VLAN has local connectivity. Which technical principle BEST explains the required approach?

OSPF neighbor formation requires consistent area and interface parameters
DHCP broadcast discovery does not inherently traverse routers without relay
Route tables and next-hop resolution are scoped by VRF
Layer 3 routing requires valid interfaces and reachable reverse paths

Explanation

Correct Answer

Layer 3 routing requires valid interfaces and reachable reverse paths. The case therefore calls for this specifically controlled action: configure the appropriate VLAN SVIs, routed addressing and inter-VLAN routes on the capable switch. The acceptance evidence is that hosts reach the permitted opposite-subnet gateway and return traffic.

Incorrect Answers

This principle choice fits a different situation: Two routing switches have configured OSPF but fail to form an adjacency. It does not resolve the stated failure mode. For this case, the decisive principle choice is to layer 3 routing requires valid interfaces and reachable reverse paths.

This principle choice fits a different situation: A client VLAN needs addresses from a DHCP server in another routed subnet. It does not resolve the stated failure mode. For this case, the decisive principle choice is to layer 3 routing requires valid interfaces and reachable reverse paths.

This principle choice fits a different situation: An isolated branch VRF lacks a route to the headquarters application. It does not resolve the stated failure mode. For this case, the decisive principle choice is to layer 3 routing requires valid interfaces and reachable reverse paths.

Question 228

A risk review for the following wired-network case asks what should be avoided: Hosts in two routed VLANs cannot communicate even though each VLAN has local connectivity. Which assumption creates the GREATEST implementation risk?

Adding an ordinary static route and expecting it to forward DHCP broadcasts
Assuming separate VLAN broadcasts can communicate without routing
Giving the peers unrelated virtual IP addresses and expecting automatic failover
Building a VNI while ignoring underlay IP reachability or platform support

Explanation

Correct Answer

Assuming separate VLAN broadcasts can communicate without routing. That shortcut fails because layer 3 routing requires valid interfaces and reachable reverse paths. Instead, the appropriate approach is to configure the appropriate VLAN SVIs, routed addressing and inter-VLAN routes on the capable switch.

Incorrect Answers

This misconception choice fits a different situation: A client VLAN needs addresses from a DHCP server in another routed subnet. It does not resolve the stated failure mode. For this case, the decisive misconception choice is to assuming separate VLAN broadcasts can communicate without routing.

This misconception choice fits a different situation: Two gateway switches should provide first-hop redundancy for one user VLAN. It does not resolve the stated failure mode. For this case, the decisive misconception choice is to assuming separate VLAN broadcasts can communicate without routing.

This misconception choice fits a different situation: A data center design requires VXLAN connectivity between routed transport endpoints. It does not resolve the stated failure mode. For this case, the decisive misconception choice is to assuming separate VLAN broadcasts can communicate without routing.

Question 229

Before changing switch configuration, an engineer investigates: Hosts in two routed VLANs cannot communicate even though each VLAN has local connectivity. Which FIRST check is most useful for isolating the cause?

Inspect underlay routing, tunnel endpoint and VNI mappings
Inspect VRF assignment, lookup table and reachable next hop
Inspect VRRP state, priorities and client default-gateway settings
Inspect SVI operational state, IP subnets and route lookup

Explanation

Correct Answer

Inspect SVI operational state, IP subnets and route lookup. This first check isolates the relevant mechanism without an untested configuration change. It tests the rule that layer 3 routing requires valid interfaces and reachable reverse paths.

Incorrect Answers

This diagnostic choice fits a different situation: A data center design requires VXLAN connectivity between routed transport endpoints. It does not resolve the stated failure mode. For this case, the decisive diagnostic choice is to inspect SVI operational state, IP subnets and route lookup.

This diagnostic choice fits a different situation: An isolated branch VRF lacks a route to the headquarters application. It does not resolve the stated failure mode. For this case, the decisive diagnostic choice is to inspect SVI operational state, IP subnets and route lookup.

This diagnostic choice fits a different situation: Two gateway switches should provide first-hop redundancy for one user VLAN. It does not resolve the stated failure mode. For this case, the decisive diagnostic choice is to inspect SVI operational state, IP subnets and route lookup.

Question 230

An implementation change is planned for: Hosts in two routed VLANs cannot communicate even though each VLAN has local connectivity. Which preventive control BEST reduces unnecessary outage and security risk?

Review route-leak requirements with policy owners before changes
Check access policy and bidirectional path before enabling routing
Perform master-down testing after checking gateway MAC behavior
Stage routing peers with a known-good interface and timer baseline

Explanation

Correct Answer

Check access policy and bidirectional path before enabling routing. This safeguard is appropriate before the change to configure the appropriate VLAN SVIs, routed addressing and inter-VLAN routes on the capable switch; it reduces exposure to the mistake of assuming separate VLAN broadcasts can communicate without routing.

Incorrect Answers

This prevention choice fits a different situation: An isolated branch VRF lacks a route to the headquarters application. It does not resolve the stated failure mode. For this case, the decisive prevention choice is to check access policy and bidirectional path before enabling routing.

This prevention choice fits a different situation: Two gateway switches should provide first-hop redundancy for one user VLAN. It does not resolve the stated failure mode. For this case, the decisive prevention choice is to check access policy and bidirectional path before enabling routing.

This prevention choice fits a different situation: Two routing switches have configured OSPF but fail to form an adjacency. It does not resolve the stated failure mode. For this case, the decisive prevention choice is to check access policy and bidirectional path before enabling routing.

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Pass Your HP HPE7-A08 Exam Easy!

Question 220

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Question 221

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Question 222

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Question 223

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Question 224

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Question 225

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Question 226

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Question 227

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Question 228

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Question 229

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Question 230

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HPE Network Switching Professional (HPE7-A08) Practice Tests