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| Section | Objectives |
|---|---|
| Network Troubleshooting and Operations | - Switch diagnostics and CLI-based troubleshooting - Performance optimization (MTU, QoS, congestion) |
| Routing and Multilayer Switching | - Inter-VLAN routing and L3 switching - OSPF fundamentals and advanced operations - BGP basics in campus environments |
| Aruba AOS-CX Switching Technologies | - VSX, VSF, and MC-LAG architecture - VLANs, trunking, and link aggregation (LACP) - Spanning Tree (RSTP/MSTP) operations |
| Multicast and Traffic Optimization | - IGMP snooping and multicast control - PIM-SM/SSM concepts (high-level) |
| Automation and Programmability | - REST API and HTTPS interface usage - NETCONF/YANG and Python-based automation (conceptual) |
| Security and Access Control | - 802.1X authentication and NAC integration (ClearPass) - Role-based access control and segmentation |
| Campus Network Architecture | - Redundancy, high availability, and load balancing strategies - Scalable enterprise network topology design - Hierarchical campus design (core, distribution, access layers) |
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NEW QUESTION # 31
When trying to add a now access switch to the network, theswitch port at the aggregation switch is automatically disabled.
What needs to be done to fix this issue?
Answer: C
Explanation:
The issue involves a new access switch's port being automatically disabled when connected to an aggregation switch, likely due to a Spanning Tree Protocol (STP) protection mechanism.
* Analysis of Options:
* Option A (Disable bpdu-filter):BPDU filtering prevents BPDUs from being sent or processed, which could cause loops, not resolve the issue.
* Option B (Disable root-guard):Root guard prevents a port from becoming the root bridge but does not cause port disablement in this context.
* Option C (Disable loop-guard):Loop guard prevents alternate ports from becoming designated but is unrelated to port disablement.
* Option D:Correct. Disabling BPDU guard on the aggregation switch's interface prevents it from disabling the port when it receives BPDUs from the new access switch.
* Why Option D is Correct:BPDU guard is an STP feature that disables a port if it receives BPDUs, assuming an unauthorized device is connected. When a new access switch isconnected, it sends BPDUs as part of normal STP operation, triggering BPDU guard on the aggregation switch and disabling the port. Disabling BPDU guard on the aggregation switch's interface (e.g., no spanning-tree bpdu-guard) allows the access switch to participate in STP without being disabled, resolving the issue while maintaining network stability.
* Relevance to Certification Objectives:
* Network Resiliency and Virtualization (8%):Involves troubleshooting STP mechanisms for fault tolerance.
* Troubleshooting (10%):Includes diagnosing and remediating STP-related issues in campus networks.
* Switching (19%):Covers Layer 2 technologies like STP and its protection features.
References:
HPE Aruba Networking AOS-CX Configuration Guide: Spanning Tree Configuration, detailing BPDU guard.
HPE7-A06Study Guide: Covers STP troubleshooting and protection mechanisms.
HPE Aruba Networking Technical Documentation: STP Best Practices, explaining BPDU guard behavior.
NEW QUESTION # 32
You are troubleshooting a network issue on a VSX cluster. The network was functioning properly yesterday but today the network operations center is receiving alerts. On one of the two VSX members, a 'show interface brief' indicated that all VSX LAGs are "down by feature".
What could be the cause of this condition?
Answer: A
Explanation:
In VSX, if the keepalive link goes down and the system detects a possible split-brain condition (both peers thinking they are primary), the secondary switch will bring down all VSX LAGs and report them as "down by feature" to prevent loops. This matches the described condition.
NEW QUESTION # 33
Aplying the command "ip Igmp snooping blocked VLAN 6. 6* on a port ...
Answer: D
Explanation:
The question asks for the effect of applying the command ip igmp snooping blocked vlan 5,6 on a switch port.
* ip igmp snooping blocked vlan <vlan-list>:This interface configuration command instructs the IGMP snooping process on the switch to block (ignore/drop) any inbound IGMP control packets (specifically Membership Reports, i.e., "joins", and Leave messages) received on this port for the specified VLANs (5 and 6 in this case).
* Effect:By blocking IGMP join messages from hosts connected to this port, the switch will not learn about any multicast group memberships requested by those hosts in VLANs 5 and 6. Consequently, the switch will not forward multicast traffic for those groups out of this port for those VLANs (unless the port is designated as a multicast router port). It effectively prevents hosts on this port from receiving multicast streams in the specified VLANs via standard IGMP mechanisms.
* Analysis of Options:
* A: Itresultsin traffic effectively being pruned because memberships aren't learned, but the command itself blocks the IGMPcontrolpackets (joins).
* B: Correct. It stops the switch from accepting IGMP join messages on this port for VLANs 5 and
6.
* C: Incorrect. It doesn't control inter-VLAN traffic.
* D: Incorrect. It doesn't disable the entire port.
* Conclusion:The command specifically blocks the reception and processing of IGMP join messages on the configured port for the listed VLANs.
References:AOS-CX Multicast Guide (IGMP Snooping configuration commands). This relates to the
"Switching" (19%) objective.
NEW QUESTION # 34
Refer to the exhibit.
XYZ Company has deployed a multi-area OSPF AS where all the routers are operating an AOS- CX switches. Engineers want to join their proposed Area 3 to their existing backbone through ABR1 as per the exhibit.
Which script would help facilitate this solution?
ABR3(config)# router ospf 1
Answer: B
Explanation:
An OSPF virtual link must be configured in the common transit area between the two ABRs - in this case, area 1 - pointing to the peer's router ID on each ABR (area 1 virtual-link 10.255.0.1 on ABR3 and area 1 virtual-link 10.255.0.3 on ABR1).
NEW QUESTION # 35
A Python developer was able to read but could not modify the VLAN database on an AOS-CX switch through the REST API.
Which settings should the developer check first? (Choose two.)
Answer: C,D
Explanation:
HTTPS settings โ Required because the AOS-CX REST API runs over HTTPS. If HTTPS is not enabled, write operations will fail.
REST API settings โ Must be checked to ensure that the REST API write mode (read/write vs.
read-only) is enabled.
NEW QUESTION # 36
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