Aruba Certified Switching Expert HPE7-A08 Exam Dumps

For a 1 Gbps link between two Aruba CX switches, the appropriate SFP port type is an SFP (Small Form-factor Pluggable). SFP+ and SFP28 are used for higher speeds such as 10 Gbps and 25 Gbps, respectively. QSFP+ is for even higher speeds (40 Gbps).

SFP supports 1 Gbps (1000BASE-X)

SFP+ supports 10 Gbps

SFP28 supports 25 Gbps and above

QSFP+ supports 40 Gbps and above

Therefore, the correct port type for a 1 Gbps link is SFP.

To prevent rogue DHCP servers in a VLAN, DHCP snooping authorized-server commands are used to specify trusted DHCP servers allowed to respond.

Option A (dhcpv4-snooping trust 10.100.100.10) configures a trusted port, but it is not VLAN specific and not precise enough for this purpose.

Enabling DHCP snooping globally and on VLAN or interface (Options C and D) are prerequisites but do not prevent rogue servers unless authorized servers are defined.

Option B correctly enables an authorized DHCP server IP on VLAN 30, blocking unauthorized DHCP responses.

The exhibit shows a configuration for a standard Stub Area (area 1 stub). To meet the customer requirement of having only a default route, we must understand how OSPF area types filter Link State Advertisements (LSAs).

Stub Area (Current Config): Blocks Type 5 (External) LSAs. The Area Border Router (ABR) injects a Type 3 LSA default route. However, Type 3 LSAs (Inter-Area routes from other parts of the OSPF network) are still allowed in. This explains why the user still sees other OSPF routes in the table.

Totally Stubby Area (The Solution): This area type is a Cisco/Aruba enhancement to the OSPF standard. It blocks both Type 5 (External) and Type 3 (Inter-Area) LSAs. The ABR replaces all of these with a single Type 3 default route . This is the most efficient configuration for a small branch switch with limited memory and a single exit point.

AOS-CX Configuration: To convert the current " Stub " to a " Totally Stubby " area, you would add the no-summary keyword on the ABR:

Bash

router ospf 1

area 1 stub no-summary

Why other options are incorrect:

Option A and D: NSSA (Not-So-Stubby Areas) are used when you need to redistribute external routes from the branch into the rest of the OSPF network. The prompt doesn ' t mention a local external source.

Option B: This is what is currently configured and is explicitly described as not meeting the requirement.

In the context of the HPE Aruba Networking troubleshooting framework, selecting a methodology depends heavily on the trigger event.

The Trigger: A physical change occurred (relocating an AP). In networking, physical changes are synonymous with Layer 1 (Physical Layer) of the OSI model.

Bottom-Up Approach: The " Bottom-up " methodology starts at the Physical Layer and works upward through the Data Link, Network, and Transport layers. Since a technician recently touched the cabling and moved the hardware, starting with the physical layer is the most efficient path. You would first verify the cable integrity, PoE power delivery from the switch, and the physical environment (RF interference in the new location).

Top-Down Approach: Alternatively, starting at the application layer (the video call software) is also a valid " starting point " when the user reports an application-specific failure. Together, the Top-down/Bottom-up model provides a structured way to isolate whether the issue is the physical move or a software configuration that coincided with it.

Why others are less suitable here:

Option B (Divide and conquer): This usually starts at Layer 3 (IP connectivity) to see if you can ping. While useful, it might skip the most likely culprit in a physical relocation: a bad cable or poor signal.

Option C: This is a remediation step, not a diagnostic methodology.

Option D (Follow the path): This is better for complex routing issues where packets are getting lost across multiple hops; it is overkill for a local boardroom connectivity issue.