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HP HPE7-A08 Bundle

Exam Code: HPE7-A08

Exam Name HPE Network Switching Professional

Certification Provider: HP

Corresponding Certification: HPE Aruba Networking Certified Professional - Switching

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HP HPE7-A08 Practice Test 31

Question 300

The HPE AOS-CX switching case is: A maintenance team shuts the primary distribution uplink without testing whether the secondary peer forwards via the gateway. Select TWO: a corrective switching action and separate evidence that the correction worked. (Select TWO.)

  1. A route-table and traceroute check confirms the selected prefix, reachable next hop and bidirectional service flow.
  2. Configure consistent active-gateway addresses and VMACs across supported VSX peers and confirm ISL and keepalive health.
  3. Host failover tests preserve gateway reachability when either designated VSX peer uplink is removed.
  4. Keep tenant or management routing tables in intended VRFs and define explicit supported inter-VRF reachability only when authorized.
  5. Establish compatible OSPF process, area, interface and adjacency parameters before relying on dynamic campus route convergence.

Explanation

Correct Answers

B:

The targeted correction for A maintenance team shuts the primary distribution uplink without testing whether the secondary peer forwards via the gateway is: Configure consistent active-gateway addresses and VMACs across supported VSX peers and confirm ISL and keepalive health. It reduces the risk that inconsistent virtual gateways or failed peer topology can cause duplicate-gateway confusion and asymmetric forwarding.

C:

A separate operational validation for A maintenance team shuts the primary distribution uplink without testing whether the secondary peer forwards via the gateway is: Host failover tests preserve gateway reachability when either designated VSX peer uplink is removed. It proves intended behavior instead of accepting configuration presence alone.

Incorrect Answers

A:

This alternative concerns static route preference and default path; its associated risk is: A default route pointing to an unreachable gateway or unintended VRF can blackhole otherwise correctly switched traffic. The observed case A maintenance team shuts the primary distribution uplink without testing whether the secondary peer forwards via the gateway requires the more specific vsx active gateway and distributed forwarding control. The targeted action is: Configure consistent active-gateway addresses and VMACs across supported VSX peers and confirm ISL and keepalive health.

D:

This alternative concerns vrf segmentation and route leaking control; its associated risk is: Treating VRFs as one shared table can leak restricted networks or leave permitted traffic with no route. The observed case A maintenance team shuts the primary distribution uplink without testing whether the secondary peer forwards via the gateway requires the more specific vsx active gateway and distributed forwarding control. The targeted action is: Configure consistent active-gateway addresses and VMACs across supported VSX peers and confirm ISL and keepalive health.

E:

This alternative concerns ospf area and neighbor formation; its associated risk is: An OSPF neighbor mismatch can leave a physical link working while required prefixes never populate the routing table. The observed case A maintenance team shuts the primary distribution uplink without testing whether the secondary peer forwards via the gateway requires the more specific vsx active gateway and distributed forwarding control. The targeted action is: Configure consistent active-gateway addresses and VMACs across supported VSX peers and confirm ISL and keepalive health.

Question 301

An HPE Aruba Networking engineer observes: An engineer assumes VSX always synchronizes every SVI setting automatically despite feature-specific synchronization limits. The corrective solution must keep intended connectivity, segmentation, and operational resilience. Which implementation or troubleshooting step directly resolves the specific network issue?

  1. Configure supported BGP neighbor reachability, autonomous system relationships and explicit route import/export controls for the actual topology.
  2. Keep tenant or management routing tables in intended VRFs and define explicit supported inter-VRF reachability only when authorized.
  3. Establish compatible OSPF process, area, interface and adjacency parameters before relying on dynamic campus route convergence.
  4. Configure consistent active-gateway addresses and VMACs across supported VSX peers and confirm ISL and keepalive health.

Explanation

Correct Answer

D:

The decisive observed condition is: An engineer assumes VSX always synchronizes every SVI setting automatically despite feature-specific synchronization limits. The appropriate switching action is: Configure consistent active-gateway addresses and VMACs across supported VSX peers and confirm ISL and keepalive health. It addresses the risk that inconsistent virtual gateways or failed peer topology can cause duplicate-gateway confusion and asymmetric forwarding. Confirm with: Host failover tests preserve gateway reachability when either designated VSX peer uplink is removed.

Incorrect Answers

A:

This alternative concerns bgp peering and route policy boundaries; its associated risk is: An established BGP session does not by itself prove that correct prefixes are advertised or accepted without leaks. The observed case An engineer assumes VSX always synchronizes every SVI setting automatically despite feature-specific synchronization limits requires the more specific vsx active gateway and distributed forwarding control. The targeted action is: Configure consistent active-gateway addresses and VMACs across supported VSX peers and confirm ISL and keepalive health.

B:

This alternative concerns vrf segmentation and route leaking control; its associated risk is: Treating VRFs as one shared table can leak restricted networks or leave permitted traffic with no route. The observed case An engineer assumes VSX always synchronizes every SVI setting automatically despite feature-specific synchronization limits requires the more specific vsx active gateway and distributed forwarding control. The targeted action is: Configure consistent active-gateway addresses and VMACs across supported VSX peers and confirm ISL and keepalive health.

C:

This alternative concerns ospf area and neighbor formation; its associated risk is: An OSPF neighbor mismatch can leave a physical link working while required prefixes never populate the routing table. The observed case An engineer assumes VSX always synchronizes every SVI setting automatically despite feature-specific synchronization limits requires the more specific vsx active gateway and distributed forwarding control. The targeted action is: Configure consistent active-gateway addresses and VMACs across supported VSX peers and confirm ISL and keepalive health.

Question 302

An engineer investigates: An engineer assumes VSX always synchronizes every SVI setting automatically despite feature-specific synchronization limits. Which test would independently confirm expected switch behavior?

  1. Host failover tests preserve gateway reachability when either designated VSX peer uplink is removed.
  2. The routing policy test checks permitted learned and advertised prefixes and rejects disallowed networks.
  3. Peer neighbor state reaches the expected adjacency and learned routes survive an approved uplink failure test.
  4. Two tenant tests confirm expected isolation and any explicitly approved shared service is reachable under policy.

Explanation

Correct Answer

A:

The independent acceptance evidence for An engineer assumes VSX always synchronizes every SVI setting automatically despite feature-specific synchronization limits is: Host failover tests preserve gateway reachability when either designated VSX peer uplink is removed. It tests whether the team has actually implemented: Configure consistent active-gateway addresses and VMACs across supported VSX peers and confirm ISL and keepalive health. An enabled interface or saved configuration by itself is not evidence of complete service recovery.

Incorrect Answers

B:

This alternative concerns bgp peering and route policy boundaries; its associated risk is: An established BGP session does not by itself prove that correct prefixes are advertised or accepted without leaks. The observed case An engineer assumes VSX always synchronizes every SVI setting automatically despite feature-specific synchronization limits requires the more specific vsx active gateway and distributed forwarding control. The targeted action is: Configure consistent active-gateway addresses and VMACs across supported VSX peers and confirm ISL and keepalive health.

C:

This alternative concerns ospf area and neighbor formation; its associated risk is: An OSPF neighbor mismatch can leave a physical link working while required prefixes never populate the routing table. The observed case An engineer assumes VSX always synchronizes every SVI setting automatically despite feature-specific synchronization limits requires the more specific vsx active gateway and distributed forwarding control. The targeted action is: Configure consistent active-gateway addresses and VMACs across supported VSX peers and confirm ISL and keepalive health.

D:

This alternative concerns vrf segmentation and route leaking control; its associated risk is: Treating VRFs as one shared table can leak restricted networks or leave permitted traffic with no route. The observed case An engineer assumes VSX always synchronizes every SVI setting automatically despite feature-specific synchronization limits requires the more specific vsx active gateway and distributed forwarding control. The targeted action is: Configure consistent active-gateway addresses and VMACs across supported VSX peers and confirm ISL and keepalive health.

Question 303

An HPE Aruba Networking engineer observes: A host intermittently ARPs for different gateway MAC identities because the two configured VSX peers do not match. The corrective solution must keep intended connectivity, segmentation, and operational resilience. Which response best satisfies the technical requirement without disrupting unrelated traffic?

  1. Configure supported BGP neighbor reachability, autonomous system relationships and explicit route import/export controls for the actual topology.
  2. Keep tenant or management routing tables in intended VRFs and define explicit supported inter-VRF reachability only when authorized.
  3. Configure an SVI with a valid VLAN, IP prefix and forwarding state on a supported AOS-CX platform to route traffic between authorized networks.
  4. Configure consistent active-gateway addresses and VMACs across supported VSX peers and confirm ISL and keepalive health.

Explanation

Correct Answer

D:

The decisive observed condition is: A host intermittently ARPs for different gateway MAC identities because the two configured VSX peers do not match. The appropriate switching action is: Configure consistent active-gateway addresses and VMACs across supported VSX peers and confirm ISL and keepalive health. It addresses the risk that inconsistent virtual gateways or failed peer topology can cause duplicate-gateway confusion and asymmetric forwarding. Confirm with: Host failover tests preserve gateway reachability when either designated VSX peer uplink is removed.

Incorrect Answers

A:

This alternative concerns bgp peering and route policy boundaries; its associated risk is: An established BGP session does not by itself prove that correct prefixes are advertised or accepted without leaks. The observed case A host intermittently ARPs for different gateway MAC identities because the two configured VSX peers do not match requires the more specific vsx active gateway and distributed forwarding control. The targeted action is: Configure consistent active-gateway addresses and VMACs across supported VSX peers and confirm ISL and keepalive health.

B:

This alternative concerns vrf segmentation and route leaking control; its associated risk is: Treating VRFs as one shared table can leak restricted networks or leave permitted traffic with no route. The observed case A host intermittently ARPs for different gateway MAC identities because the two configured VSX peers do not match requires the more specific vsx active gateway and distributed forwarding control. The targeted action is: Configure consistent active-gateway addresses and VMACs across supported VSX peers and confirm ISL and keepalive health.

C:

This alternative concerns svi addressing and inter-vlan routing; its associated risk is: Duplicate gateways or mismatched prefix lengths can make hosts reachable only locally or create asymmetric routing. The observed case A host intermittently ARPs for different gateway MAC identities because the two configured VSX peers do not match requires the more specific vsx active gateway and distributed forwarding control. The targeted action is: Configure consistent active-gateway addresses and VMACs across supported VSX peers and confirm ISL and keepalive health.

Question 304

The switch operations team reports: A host intermittently ARPs for different gateway MAC identities because the two configured VSX peers do not match. What is the most relevant operational exposure in this switching scenario?

  1. Treating VRFs as one shared table can leak restricted networks or leave permitted traffic with no route.
  2. Inconsistent virtual gateways or failed peer topology can cause duplicate-gateway confusion and asymmetric forwarding.
  3. An established BGP session does not by itself prove that correct prefixes are advertised or accepted without leaks.
  4. Duplicate gateways or mismatched prefix lengths can make hosts reachable only locally or create asymmetric routing.

Explanation

Correct Answer

B:

The direct operational failure mode is: Inconsistent virtual gateways or failed peer topology can cause duplicate-gateway confusion and asymmetric forwarding. It applies to the condition A host intermittently ARPs for different gateway MAC identities because the two configured VSX peers do not match. The suitable corrective action is: Configure consistent active-gateway addresses and VMACs across supported VSX peers and confirm ISL and keepalive health. Independently validate using: Host failover tests preserve gateway reachability when either designated VSX peer uplink is removed.

Incorrect Answers

A:

This alternative concerns vrf segmentation and route leaking control; its associated risk is: Treating VRFs as one shared table can leak restricted networks or leave permitted traffic with no route. The observed case A host intermittently ARPs for different gateway MAC identities because the two configured VSX peers do not match requires the more specific vsx active gateway and distributed forwarding control. The targeted action is: Configure consistent active-gateway addresses and VMACs across supported VSX peers and confirm ISL and keepalive health.

C:

This alternative concerns bgp peering and route policy boundaries; its associated risk is: An established BGP session does not by itself prove that correct prefixes are advertised or accepted without leaks. The observed case A host intermittently ARPs for different gateway MAC identities because the two configured VSX peers do not match requires the more specific vsx active gateway and distributed forwarding control. The targeted action is: Configure consistent active-gateway addresses and VMACs across supported VSX peers and confirm ISL and keepalive health.

D:

This alternative concerns svi addressing and inter-vlan routing; its associated risk is: Duplicate gateways or mismatched prefix lengths can make hosts reachable only locally or create asymmetric routing. The observed case A host intermittently ARPs for different gateway MAC identities because the two configured VSX peers do not match requires the more specific vsx active gateway and distributed forwarding control. The targeted action is: Configure consistent active-gateway addresses and VMACs across supported VSX peers and confirm ISL and keepalive health.

Question 305

An HPE Aruba Networking engineer observes: A video feed saturates unrelated classroom access ports because IGMP snooping was never activated. The corrective solution must keep intended connectivity, segmentation, and operational resilience. Which change best addresses the observed switching requirement?

  1. Configure consistent active-gateway addresses and VMACs across supported VSX peers and confirm ISL and keepalive health.
  2. Use supported IGMP snooping and a proper querier to constrain layer-2 multicast to subscribed receiver ports.
  3. Plan PIM-enabled supported routed interfaces, unicast RPF reachability and rendezvous-point requirements for cross-subnet multicast.
  4. Keep tenant or management routing tables in intended VRFs and define explicit supported inter-VRF reachability only when authorized.

Explanation

Correct Answer

B:

The decisive observed condition is: A video feed saturates unrelated classroom access ports because IGMP snooping was never activated. The appropriate switching action is: Use supported IGMP snooping and a proper querier to constrain layer-2 multicast to subscribed receiver ports. It addresses the risk that without valid membership state, multicast can flood unrelated access ports or fail to reach intended receivers. Confirm with: One subscribed receiver receives the stream while an unsubscribed VLAN port is not flooded during the test.

Incorrect Answers

A:

This alternative concerns vsx active gateway and distributed forwarding; its associated risk is: Inconsistent virtual gateways or failed peer topology can cause duplicate-gateway confusion and asymmetric forwarding. The observed case A video feed saturates unrelated classroom access ports because IGMP snooping was never activated requires the more specific igmp snooping querier and multicast receiver membership control. The targeted action is: Use supported IGMP snooping and a proper querier to constrain layer-2 multicast to subscribed receiver ports.

C:

This alternative concerns pim sparse-mode and routed multicast control; its associated risk is: Correct IGMP join behavior at a receiver does not create an inter-VLAN multicast path without the appropriate routed multicast control plane. The observed case A video feed saturates unrelated classroom access ports because IGMP snooping was never activated requires the more specific igmp snooping querier and multicast receiver membership control. The targeted action is: Use supported IGMP snooping and a proper querier to constrain layer-2 multicast to subscribed receiver ports.

D:

This alternative concerns vrf segmentation and route leaking control; its associated risk is: Treating VRFs as one shared table can leak restricted networks or leave permitted traffic with no route. The observed case A video feed saturates unrelated classroom access ports because IGMP snooping was never activated requires the more specific igmp snooping querier and multicast receiver membership control. The targeted action is: Use supported IGMP snooping and a proper querier to constrain layer-2 multicast to subscribed receiver ports.

Question 306

An engineer investigates: A video feed saturates unrelated classroom access ports because IGMP snooping was never activated. What network observation should the team require before approving completion?

  1. Two tenant tests confirm expected isolation and any explicitly approved shared service is reachable under policy.
  2. A source and receiver in separate test subnets exchange multicast while RPF and PIM neighbor states match the design.
  3. Host failover tests preserve gateway reachability when either designated VSX peer uplink is removed.
  4. One subscribed receiver receives the stream while an unsubscribed VLAN port is not flooded during the test.

Explanation

Correct Answer

D:

The independent acceptance evidence for A video feed saturates unrelated classroom access ports because IGMP snooping was never activated is: One subscribed receiver receives the stream while an unsubscribed VLAN port is not flooded during the test. It tests whether the team has actually implemented: Use supported IGMP snooping and a proper querier to constrain layer-2 multicast to subscribed receiver ports. An enabled interface or saved configuration by itself is not evidence of complete service recovery.

Incorrect Answers

A:

This alternative concerns vrf segmentation and route leaking control; its associated risk is: Treating VRFs as one shared table can leak restricted networks or leave permitted traffic with no route. The observed case A video feed saturates unrelated classroom access ports because IGMP snooping was never activated requires the more specific igmp snooping querier and multicast receiver membership control. The targeted action is: Use supported IGMP snooping and a proper querier to constrain layer-2 multicast to subscribed receiver ports.

B:

This alternative concerns pim sparse-mode and routed multicast control; its associated risk is: Correct IGMP join behavior at a receiver does not create an inter-VLAN multicast path without the appropriate routed multicast control plane. The observed case A video feed saturates unrelated classroom access ports because IGMP snooping was never activated requires the more specific igmp snooping querier and multicast receiver membership control. The targeted action is: Use supported IGMP snooping and a proper querier to constrain layer-2 multicast to subscribed receiver ports.

C:

This alternative concerns vsx active gateway and distributed forwarding; its associated risk is: Inconsistent virtual gateways or failed peer topology can cause duplicate-gateway confusion and asymmetric forwarding. The observed case A video feed saturates unrelated classroom access ports because IGMP snooping was never activated requires the more specific igmp snooping querier and multicast receiver membership control. The targeted action is: Use supported IGMP snooping and a proper querier to constrain layer-2 multicast to subscribed receiver ports.

Question 307

An HPE Aruba Networking engineer observes: Snooping is enabled but the VLAN has no IGMP querier and memberships age out unpredictably. The corrective solution must keep intended connectivity, segmentation, and operational resilience. What is the most defensible operational action before closing the network change?

  1. Use supported IGMP snooping and a proper querier to constrain layer-2 multicast to subscribed receiver ports.
  2. Set a consistent MSTP region name, revision and VLAN-to-instance mapping and deliberately place the root where the topology requires.
  3. Plan PIM-enabled supported routed interfaces, unicast RPF reachability and rendezvous-point requirements for cross-subnet multicast.
  4. Validate port mode, negotiated speed, duplex, cabling and budgeted PoE on actual endpoint-facing interfaces prior to service handoff.

Explanation

Correct Answer

A:

The decisive observed condition is: Snooping is enabled but the VLAN has no IGMP querier and memberships age out unpredictably. The appropriate switching action is: Use supported IGMP snooping and a proper querier to constrain layer-2 multicast to subscribed receiver ports. It addresses the risk that without valid membership state, multicast can flood unrelated access ports or fail to reach intended receivers. Confirm with: One subscribed receiver receives the stream while an unsubscribed VLAN port is not flooded during the test.

Incorrect Answers

B:

This alternative concerns mstp configuration and loop control; its associated risk is: A mismatched MSTP region or unintended root can block critical trunks or increase convergence disruption. The observed case Snooping is enabled but the VLAN has no IGMP querier and memberships age out unpredictably requires the more specific igmp snooping querier and multicast receiver membership control. The targeted action is: Use supported IGMP snooping and a proper querier to constrain layer-2 multicast to subscribed receiver ports.

C:

This alternative concerns pim sparse-mode and routed multicast control; its associated risk is: Correct IGMP join behavior at a receiver does not create an inter-VLAN multicast path without the appropriate routed multicast control plane. The observed case Snooping is enabled but the VLAN has no IGMP querier and memberships age out unpredictably requires the more specific igmp snooping querier and multicast receiver membership control. The targeted action is: Use supported IGMP snooping and a proper querier to constrain layer-2 multicast to subscribed receiver ports.

D:

This alternative concerns physical ethernet and poe interface readiness; its associated risk is: A link light may hide wrong negotiation, power shortfall or incompatible copper medium, producing sporadic endpoint loss. The observed case Snooping is enabled but the VLAN has no IGMP querier and memberships age out unpredictably requires the more specific igmp snooping querier and multicast receiver membership control. The targeted action is: Use supported IGMP snooping and a proper querier to constrain layer-2 multicast to subscribed receiver ports.

Question 308

The switch operations team reports: Snooping is enabled but the VLAN has no IGMP querier and memberships age out unpredictably. Which consequence explains why the described network state is unsuitable?

  1. Without valid membership state, multicast can flood unrelated access ports or fail to reach intended receivers.
  2. Correct IGMP join behavior at a receiver does not create an inter-VLAN multicast path without the appropriate routed multicast control plane.
  3. A link light may hide wrong negotiation, power shortfall or incompatible copper medium, producing sporadic endpoint loss.
  4. A mismatched MSTP region or unintended root can block critical trunks or increase convergence disruption.

Explanation

Correct Answer

A:

The direct operational failure mode is: Without valid membership state, multicast can flood unrelated access ports or fail to reach intended receivers. It applies to the condition Snooping is enabled but the VLAN has no IGMP querier and memberships age out unpredictably. The suitable corrective action is: Use supported IGMP snooping and a proper querier to constrain layer-2 multicast to subscribed receiver ports. Independently validate using: One subscribed receiver receives the stream while an unsubscribed VLAN port is not flooded during the test.

Incorrect Answers

B:

This alternative concerns pim sparse-mode and routed multicast control; its associated risk is: Correct IGMP join behavior at a receiver does not create an inter-VLAN multicast path without the appropriate routed multicast control plane. The observed case Snooping is enabled but the VLAN has no IGMP querier and memberships age out unpredictably requires the more specific igmp snooping querier and multicast receiver membership control. The targeted action is: Use supported IGMP snooping and a proper querier to constrain layer-2 multicast to subscribed receiver ports.

C:

This alternative concerns physical ethernet and poe interface readiness; its associated risk is: A link light may hide wrong negotiation, power shortfall or incompatible copper medium, producing sporadic endpoint loss. The observed case Snooping is enabled but the VLAN has no IGMP querier and memberships age out unpredictably requires the more specific igmp snooping querier and multicast receiver membership control. The targeted action is: Use supported IGMP snooping and a proper querier to constrain layer-2 multicast to subscribed receiver ports.

D:

This alternative concerns mstp configuration and loop control; its associated risk is: A mismatched MSTP region or unintended root can block critical trunks or increase convergence disruption. The observed case Snooping is enabled but the VLAN has no IGMP querier and memberships age out unpredictably requires the more specific igmp snooping querier and multicast receiver membership control. The targeted action is: Use supported IGMP snooping and a proper querier to constrain layer-2 multicast to subscribed receiver ports.

Question 309

An HPE Aruba Networking engineer observes: An operator treats IGMP membership as evidence that PIM routing between different subnets is automatically configured. The corrective solution must keep intended connectivity, segmentation, and operational resilience. Which implementation or troubleshooting step directly resolves the specific network issue?

  1. Plan PIM-enabled supported routed interfaces, unicast RPF reachability and rendezvous-point requirements for cross-subnet multicast.
  2. Use supported IGMP snooping and a proper querier to constrain layer-2 multicast to subscribed receiver ports.
  3. Integrate switch configuration and monitoring with the intended Central deployment method while reconciling local changes, templates and device exceptions.
  4. Differentiate supported ingress policing from egress shaping and confirm rate controls fit the actual traffic direction and SLA.

Explanation

Correct Answer

B:

The decisive observed condition is: An operator treats IGMP membership as evidence that PIM routing between different subnets is automatically configured. The appropriate switching action is: Use supported IGMP snooping and a proper querier to constrain layer-2 multicast to subscribed receiver ports. It addresses the risk that without valid membership state, multicast can flood unrelated access ports or fail to reach intended receivers. Confirm with: One subscribed receiver receives the stream while an unsubscribed VLAN port is not flooded during the test.

Incorrect Answers

A:

This alternative concerns pim sparse-mode and routed multicast control; its associated risk is: Correct IGMP join behavior at a receiver does not create an inter-VLAN multicast path without the appropriate routed multicast control plane. The observed case An operator treats IGMP membership as evidence that PIM routing between different subnets is automatically configured requires the more specific igmp snooping querier and multicast receiver membership control. The targeted action is: Use supported IGMP snooping and a proper querier to constrain layer-2 multicast to subscribed receiver ports.

C:

This alternative concerns central and aos-cx configuration consistency; its associated risk is: A local fix that conflicts with centrally enforced state can disappear on the next synchronization cycle. The observed case An operator treats IGMP membership as evidence that PIM routing between different subnets is automatically configured requires the more specific igmp snooping querier and multicast receiver membership control. The targeted action is: Use supported IGMP snooping and a proper querier to constrain layer-2 multicast to subscribed receiver ports.

D:

This alternative concerns qos policing shaping and trust verification; its associated risk is: A policer applied in the wrong direction can drop desired traffic, while shaping on the wrong interface does not alleviate the bottleneck. The observed case An operator treats IGMP membership as evidence that PIM routing between different subnets is automatically configured requires the more specific igmp snooping querier and multicast receiver membership control. The targeted action is: Use supported IGMP snooping and a proper querier to constrain layer-2 multicast to subscribed receiver ports.

Question 310

The HPE AOS-CX switching case is: An operator treats IGMP membership as evidence that PIM routing between different subnets is automatically configured. Which TWO choices together provide the targeted remedy and independent validation? (Select TWO.)

  1. Use supported IGMP snooping and a proper querier to constrain layer-2 multicast to subscribed receiver ports.
  2. Differentiate supported ingress policing from egress shaping and confirm rate controls fit the actual traffic direction and SLA.
  3. Plan PIM-enabled supported routed interfaces, unicast RPF reachability and rendezvous-point requirements for cross-subnet multicast.
  4. One subscribed receiver receives the stream while an unsubscribed VLAN port is not flooded during the test.
  5. A controlled policy change remains effective after Central reconciliation and matches its intended device group and exceptions.

Explanation

Correct Answers

A:

The targeted correction for An operator treats IGMP membership as evidence that PIM routing between different subnets is automatically configured is: Use supported IGMP snooping and a proper querier to constrain layer-2 multicast to subscribed receiver ports. It reduces the risk that without valid membership state, multicast can flood unrelated access ports or fail to reach intended receivers.

D:

A separate operational validation for An operator treats IGMP membership as evidence that PIM routing between different subnets is automatically configured is: One subscribed receiver receives the stream while an unsubscribed VLAN port is not flooded during the test. It proves intended behavior instead of accepting configuration presence alone.

Incorrect Answers

B:

This alternative concerns qos policing shaping and trust verification; its associated risk is: A policer applied in the wrong direction can drop desired traffic, while shaping on the wrong interface does not alleviate the bottleneck. The observed case An operator treats IGMP membership as evidence that PIM routing between different subnets is automatically configured requires the more specific igmp snooping querier and multicast receiver membership control. The targeted action is: Use supported IGMP snooping and a proper querier to constrain layer-2 multicast to subscribed receiver ports.

C:

This alternative concerns pim sparse-mode and routed multicast control; its associated risk is: Correct IGMP join behavior at a receiver does not create an inter-VLAN multicast path without the appropriate routed multicast control plane. The observed case An operator treats IGMP membership as evidence that PIM routing between different subnets is automatically configured requires the more specific igmp snooping querier and multicast receiver membership control. The targeted action is: Use supported IGMP snooping and a proper querier to constrain layer-2 multicast to subscribed receiver ports.

E:

This alternative concerns central and aos-cx configuration consistency; its associated risk is: A local fix that conflicts with centrally enforced state can disappear on the next synchronization cycle. The observed case An operator treats IGMP membership as evidence that PIM routing between different subnets is automatically configured requires the more specific igmp snooping querier and multicast receiver membership control. The targeted action is: Use supported IGMP snooping and a proper querier to constrain layer-2 multicast to subscribed receiver ports.