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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Routing | 16% | |
| Topic 2: Troubleshooting | 9% | |
| Topic 3: Connectivity | 13% | |
| Topic 4: Network Resiliency and Virtualization | 12% | |
| Topic 5: Network Stack | 4% | |
| Topic 6: WLAN | 10% | |
| Topic 7: Security | 13% | |
| Topic 8: Switching | 19% | |
| Topic 9: Performance Optimization | 4% |
>> Certification HPE7-A06 Questions <<
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NEW QUESTION # 111
Which tables arc synchronized between a pair ofCX 8325 switches in a VSX cluster? (Select two.)
Answer: C,E
Explanation:
The question asks which tables are synchronized between a pair of CX 8325 switches in a Virtual Switching Extension (VSX) cluster. VSX is a high-availability solution that synchronizes specific tables to ensure consistent operation across both switches.
* Analysis of Options:
* A. BGP Neighbors:BGP neighbor tables are not synchronized in VSX; each switch maintains its own BGP sessions.
* B. MAC address:Correct. VSX synchronizes the MAC address table to ensure consistent Layer
2 forwarding across both switches.
* C. Spanning-Tree Protocol (STP):STP states are not synchronized; each switch runs its own STP instance, though they coordinate to avoid loops.
* D. IP Routing:Correct. VSX synchronizes the IP routing table to ensure consistent Layer 3 forwarding.
* E. Link Layer Discovery Protocol (LLDP):LLDP information is not synchronized; each switch maintains its own neighbor information.
* Why B and D are Correct:In a VSX cluster, the MAC address table and IP routing table are synchronized to ensure seamless Layer 2 and Layer 3 operations. This synchronization allowsboth switches to share a common view of the network, enabling features like active-active forwarding and hitless failover. The vsx-sync feature in AOS-CX ensures these tables are kept consistent across the VSX pair.
* Relevance to Certification Objectives:
* Network Resiliency and Virtualization (8%):Involves designing and troubleshooting VSX for resiliency and redundancy.
* Switching (19%):Includes implementing and troubleshooting Layer 2 technologies like MAC address tables.
* Routing (16%):Covers IP routing table synchronization in VSX environments.
References:
HPE Aruba Networking AOS-CX Configuration Guide: VSX Configuration, detailing table synchronization.
HPE7-A06Study Guide: Covers VSX architecture and synchronization mechanisms.
HPE Aruba Networking Technical Documentation: VSX Overview, explaining MAC and routing table synchronization.
VSX (Virtual Switching Extension) synchronizes state information between the two switches in a cluster to enable active-active forwarding and provide a single logical view to downstream devices.
Analysis of Options:
A: BGP Neighbors: BGP sessions are typically established independently by each VSX member. While configurations can be synced, the dynamic state/neighbor table itself is not a core VSX synchronization item.
B: MAC address: The MAC address table is synchronized between VSX members. This is crucial for Layer 2 forwarding consistency and allowing either switch to forward traffic destined for a known MAC address learned via the VSX pair.
C: Spanning-Tree Protocol (STP): STP runs independently on each physical switch. VSX uses technologies like MC-LAG to provide loop-free active-active paths downstream, reducing reliance on STP blocking, but the STP state itself isn't synchronized via the ISL.
D: IP Routing: While the full IP routing table (RIB) is built independently on each switch via routing protocols, VSX Active Gateway synchronizes necessary Layer 3 information (like virtual gateway IP and MAC, and potentially ARP entries) to ensure consistent first-hop routing and failover. Some sources might broadly categorize ARP synchronization under L3/IP routing context in VSX. Given that the ARP table (essential for L3 forwarding consistency) is synchronized, and it's not listed separately, "IP Routing" might encompass this synchronization aspect.
E: Link Layer Discovery Protocol (LLDP): LLDP information relates to physically connected neighbors of each switch and is not synchronized across the VSX ISL.
Conclusion: The MAC address table (B) is definitively synchronized. The ARP table is also synchronized, which is fundamental for Layer 3 forwarding consistency provided by Active Gateway. As ARP is not explicitly listed, and "IP Routing" (D) is, D is the most likely second answer intended to cover the necessary L3 state synchronization (primarily ARP and Active Gateway state) performed by VSX.
References: AOS-CX VSX Guide (specifically sections on State Synchronization, ISL, Active Gateway), VSX Fundamentals documentation. This relates to "Network Resiliency and virtualization" (8%) and
"Switching" (19%) objectives.
NEW QUESTION # 112
Refer to the exhibit.
A gateway cluster needs to be connected to the VSX-enabled switches where MC-LAG is configured What Is a possible constraint?
Answer: D
Explanation:
The question asks about a possible constraint when connecting an Aruba Gateway Cluster to upstream VSX switches using an MC-LAG.
* Scenario:Gateway Cluster acts as a single logical device forming an LACP LAG. The VSX switches are configured with MC-LAG, allowing the gateway cluster to bundle links across the two physical VSX switches.
* LACP & Initial Provisioning:LACP requires negotiation (exchange of LACP PDUs) between both ends of the link bundle to activate the LAG. During initial gateway provisioning (ZTP, OTP), the gateway might be in a minimal state without its full configuration, including LACP parameters. If the VSX switch ports are configured strictly for LACP active mode, the LAG might not form until the gateway is fully provisioned and running LACP. This lack of connectivity during provisioning is a constraint.
* Analysis of Options:
* A: lacp mode active is standard, but the issue is during provisioning, not runtime mode choice.
"static-activate" is unrelated.
* B: Theabsenceof lacp fallback could be the constraint. Fallback allows connectivity if LACP doesn't establish, which is useful during provisioning.
* C: LLDP is not required for LACP.
* D: Correctly identifies the constraint: Standard LACP required by the switch might not be supported or active on the gateway during its initial provisioning phase, potentially hindering the setup process. Workarounds like disabling LACP or enabling LACP fallback on the switch ports during this phase are often necessary.
* Conclusion:LACP incompatibility during the initial provisioning phase of the gateway cluster is a common constraint when connecting to switches requiring LACP for the LAG.
References:Aruba Gateway Installation Guides, AOS-CX MC-LAG Configuration Guide, LACP Standard (IEEE 802.3ad). This relates to "Connectivity" (9%) and "Network Resiliency and virtualization" (8%).
NEW QUESTION # 113
Refer to the exhibit.
An end-to-end QoS design needs to be implemented for wired and wireless.
What is needed on the LAN side to maintain the correct DSCP tags?
Answer: D
Explanation:
In an end-to-end QoS design, the AP already maps WMM (wireless QoS) values to DSCP values when traffic enters the wired LAN. To preserve these QoS markings, the LAN edge and LAN core devices must be configured to trust the DSCP values instead of re-marking them. Trusting DSCP- marked packets ensures the QoS tags from the wireless side are carried consistently through the wired LAN.
NEW QUESTION # 114
Drag and Drop Question
Match the AOS-CX switch BGP keepalive and holddown timers to the default.
Answer:
Explanation:
Explanation:
Keepalive timer: 60 seconds (interval for sending keepalive messages).
Holddown (Hold) timer: 180 seconds (maximum time to wait before declaring a neighbor down if no keepalives are received).
NEW QUESTION # 115
A senior engineer from the network operations team has reported an intermittent problem where some PoE-powered devices are randomly losing power. During your investigation, you find that port 1 of the Acc-1 switch is currently presenting the behavior shown in the CLI output for the Acc-1.
What is a probable cause for poor 1/1/1 is denying PoE?
Answer: A
Explanation:
The output shows: Available: 370 W, Reserved: 360.60 W, Remaining: 9.40 W.
Port 1/1/1 has status "Denied" for PoE power delivery and is set to "Low" priority.
This means the PoE power budget is nearly exhausted and the switch cannot allocate more PoE power to additional ports, especially those with low priority.
NEW QUESTION # 116
......
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