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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Troubleshoot Wired Network Solution | 25% | - Troubleshooting methodology and tools - Security and performance problem resolution - Fault isolation for Layer 2 and Layer 3 issues |
| Topic 2: Manage, Maintain, Optimize and Monitor Wired Network Solution | 24% | - Monitoring, logging, and reporting - Performance optimization and capacity planning - Programmatic management: REST API, automation |
| Topic 3: Create Implementation Plan for Wired Network Solution | 18% | - HPE Aruba Networking switching portfolio and use cases - Design and requirements analysis for switching solutions |
| Topic 4: Install and Configure Wired Network Solution | 33% | - Security: ACL, port security, segmentation, authentication - Multicast features and configuration - Physical installation and connection - QoS: classification, marking, prioritization - Layer 3: interfaces, routing protocols, overlays - Layer 2 technologies: VLAN, trunking, STP, aggregation - Switch provisioning via Aruba Central and CLI |
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NEW QUESTION # 132
A junior engineer has configured eBGP between two CX switches (Agg-1 and Agg-2) using the configuration below, and tells you that the neighbors are in the 'Active' state.
What can you tell them?
Answer: C
Explanation:
The term " Active " in BGP is one of the most misunderstood states. It sounds positive, but it actually indicates that the switch is " actively " trying to establish a TCP connection and failing.
eBGP Default Behavior: By default, External BGP (eBGP) expects neighbors to be directly connected.
Because of this, eBGP packets are sent with a Time to Live (TTL) of 1.
The Loopback Problem: In the exhibit, the switches are peering using their Loopback 0 addresses (update- source loopback 0). Even if the switches are physically connected, the Loopback interface is considered a " hop " away from the physical interface.
TTL Expiry: When Agg-1 sends a BGP packet to Agg-2 ' s loopback, the TTL of 1 expires before the packet can reach the logical loopback interface. This causes the TCP connection to fail, keeping the session in the Active state.
The Solution (eBGP Multihop): To fix this, you must configure ebgp-multihop (usually with a value of 2 or more). This increases the TTL, allowing the BGP packets to reach the loopback address.
Side Note on the Exhibit: If you look closely at Agg-1 ' s configuration, there is a typo: the neighbor is defined as 10.3.0.3 but the address-family activation is for 10.3.0.2. While this would also cause a failure, the core architectural concept being tested here regarding " Active " state and loopbacks is the TTL/Multihop requirement.
NEW QUESTION # 133
Refer to the exhibit.
SW-A is the layer-3 gateway for:
* Server-A in VLAN 100, subnet 10.100.100.0/24
* Client-A in VLAN 20, subnet 10.100.20.0/24
* Client-B VLAN 30, subnet 10.100.30.0/24
What can be done to trust DHCP server 10.100.100.10 responses on SW-A for clients in VLAN 20?
Answer: A
Explanation:
On AOS-CX, the authorized DHCP server list is configured at global/VRF scope rather than within an individual VLAN . The relevant configuration is therefore to enable DHCPv4 snooping globally and add
10.100.100.10 to the authorized-server list. HPE Aruba documents the command as dhcpv4-snooping authorized-server < IPV4-ADDR > [vrf < VRF-NAME > ]; in newer AOS-CX releases, the dhcpv4-snooping keyword has been superseded by dhcp-snooping. Aruba Networks The authorized-server mechanism causes DHCP replies received through trusted paths to be accepted only when their server address appears in the permitted list. HPE ' s DHCP snooping sample configuration shows the same operational sequence: enable DHCP snooping globally, enable it on the required client VLANs, configure the trusted server-facing/uplink interface, and then configure the authorized DHCP server globally.
Aruba Networks
Therefore, neither VLAN 100 nor VLAN 20 is the configuration context for the authorized-server command.
Option D is also syntactically incorrect because dhcpv4-snooping trust is an interface-level operation; it trusts the port/path, not a server IP address. For VLAN 20 to be protected, DHCP snooping must additionally be active on VLAN 20. Aruba Networks Study Guide References: DHCPv4 Snooping; Authorized DHCP Servers; Trusted/Untrusted Interfaces; DHCP Relay Across VLANs; DHCP Snooping Security.
NEW QUESTION # 134
Which CLI command enables global configuration mode on an Aruba CX switch?
Answer: D
Explanation:
The config terminal command allows users to enter global configuration mode, where they can modify switch settings such as VLANs, interfaces, and routing.
NEW QUESTION # 135
You are implementing a design where the campus network should be in an isolated spanning tree topology from the data center network. The core switches are connected by a single layer-2 interface carrying multiple VLANs. When you examine the switches you discover that the campus core sees the data center core as the root bridge.
Which configuration can you apply to the campus to data center core link to resolve the issue?
Answer: C
Explanation:
In complex network designs involving different administrative domains (like a Campus and a Data Center), it is often desirable to prevent Spanning Tree Protocol (STP) from merging the two environments into a single, massive logical tree.
* The Goal of Isolation: " Isolated spanning tree topology " means that the Campus and the Data Center should each have their own independent Root Bridge and calculate their own loop-free paths without being influenced by one another.
* BPDU Filter (The Solution): When you apply BPDU Filter to an interface, the switch stops sending BPDUs out of that port and, more importantly, ignores any incoming BPDUs. Because the Campus switch no longer " sees " the BPDUs coming from the Data Center core, it will stop recognizing the DC as the Root Bridge and will instead elect a local Root Bridge (or remain as the Root itself). This effectively breaks the STP connection between the two domains while still allowing Layer 2 data traffic to flow.
* Evaluating Other Options:
* Option A (Root Guard): This is used to prevent a specific port from becoming a Root Port. If a superior BPDU is received, the port is placed into a " root-inconsistent " state (blocked). While this protects the local Root role, it does not " isolate " the topology; the switches still participate in the same overall STP domain.
* Option C (BPDU Guard): This is intended for edge ports (connected to PCs/Printers). If it receives a BPDU, it shuts down the port entirely (rxtx-disable). Applying this to a core-to-core link would cause a total loss of connectivity as soon as the DC core sends a BPDU.
* Option D (Admin Edge): This simply tells the switch to skip the Listening/Learning states and go straight to Forwarding. It does not provide topology isolation.
NEW QUESTION # 136
Which command is used to enable LLDP globally on an Aruba switch?
Response:
Answer: D
NEW QUESTION # 137
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