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HPE Campus Access Switching Expert Written Exam Sample Questions (Q61-Q66):

NEW QUESTION # 61
the administrator of a largo company noticed thatthere are some problems with UCC sessions on a wired network. Some employees complain about dropped calls and poor quality. The administrator wants to monitor, jitter on AOS-CX switches with iP SLA. but notices results spiking to 100% What should the administrator check first to correct monitoring to run as desired?

A. number of NAE agents
B. source IP and source port combination
C. memory and processor usage
D. CoPP settings

Answer: C

Explanation:
The administrator observes IP SLA jitter monitoring results spiking to 100% when monitoring UCC sessions.
This indicates either extremely severe network jitter or, more likely, a problem with the IP SLA operation or measurement itself on the AOS-CX switch.
* IP SLA & Jitter:IP SLA measures jitter by analyzing the inter-packet delay variation of probe packets.
Accurate measurements depend on the switch generating and processing these probes consistently.
* Factors Affecting IP SLA Accuracy:
* Switch Resource Contention:If the switch's CPU or memory is heavily utilized, the operating system might not schedule the IP SLA process promptly. This can lead to inconsistent generation or processing of probe packets, causing highly inaccurate measurements, including extreme jitter values like 100%.
* Control Plane Policing (CoPP):IP SLA packets are control plane traffic. If CoPP policies are too restrictive, they might drop or delay IP SLA probes, skewing results.
* Network Path Issues:Actual severe jitter on the network path would also cause high readings, but 100% spikes often suggest measurement error first.
* Troubleshooting Steps:When encountering unexpectedly high or erratic IP SLA results, the first step is often to rule out issues with the monitoring device itself.
* Analysis of Options:
* A. memory and processor usage: Checking the switch's resource utilization is crucial. High CPU
/memory load can directly impact the timing accuracy of IP SLA operations.
* B. source IP and source port combination: Unlikely to cause 100% jitter spikes unless fundamentally misconfigured causing probe failure.
* C. number of NAE agents: NAE agents consume resources, but checking overall CPU/memory (A) is more direct.
* D. CoPP settings: A valid concern, as CoPP affects control plane traffic. However, checking overall system load (A) is typically a primary check before delving into specific policies like CoPP.
* Conclusion:High memory and processor usage (Option A) on the switch running the IP SLA operation is a common cause for inaccurate timing and resulting erroneous jitter measurements. This should be checked first to ensure the monitoring platform itself is functioning correctly.
References:AOS-CX IP SLA Guide, AOS-CX Management and Configuration Guide (Monitoring CPU
/Memory, CoPP). This relates to "Performance Optimization" (6%) and "Troubleshooting" (10%).

NEW QUESTION # 62
A Python developer could not modify the VLAN database on an AOS-CX switch through the REST API.
Which settings should the developer check first? (Select two.)

A. SSH settings
B. REST API settings
C. local-user settings
D. SNMP settings
E. HTTPS settings

Answer: C,E

Explanation:
A Python developer using the REST API cannot modify the VLAN database on an AOS-CX switch. We need to identify the first settings to check.
* REST API Requirements for Modification:
* HTTPS Server:The REST API operates over HTTPS, so the HTTPS server must be enabled on the switch (show https-server status).
* REST Interface:The REST API interface itself must be enabled (it usually is by default, check with show rest-interface).
* Authentication:The API client must provide valid credentials (username/password or token) for a user account configured on the switch.
* Authorization:The authenticated user account must have sufficient privileges to modify the configuration (e.g., belong to the built-in administrators group or a custom role with appropriate permissions). Check user details (show user <name>) and role permissions (show user roles).
* Analysis of Options:
* A. HTTPS settings: Essential for API communication. Check if enabled.
* B. SSH settings: Irrelevant to REST API.
* C. SNMP settings: Irrelevant to REST API.
* D. REST API settings: Check if enabled (show rest-interface), but it's usually enabled by default.
Less likely than A or E to be the initial problem.
* E. local-user settings: Crucial for both authentication (correct credentials used?) and authorization (does the user have modification privileges?).
* Conclusion:When a REST API modification fails, the most critical initial checks involve ensuring the API endpoint is accessible (HTTPS Server enabled - A) and that the user account being used for the API call has the necessary permissions (local-user settings, specifically privileges/roles - E).
References:AOS-CX REST API Guide, AOS-CX Security Guide (User Accounts, Roles, HTTPS Server configuration). This relates to "Security" (10%) and "Authentication/Authorization" (9%).

NEW QUESTION # 63
Aplying the command "ip Igmp snooping blocked VLAN 6. 6* on a port ...

A. won't allow multicast on that port in VLAN 5 and 6 and disables the port.
B. won't allow multicast traffic between VLAN 5 and 6.
C. won't prune multicast on that port on VLAN 5 and 6
D. won't accept multicast Igmp joins on that port or VLAN 5 and 6.

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 # 64
Exhibit.

Acme Corp has VM workload running from ToR-1. and has noticed performancedegradation They suspect ToK-1 uplinks are periodically overutilized. List valid reasons whyToR-1 uplinks 3re being overutilized based on the diagram. (Select two.)

A. Core-2 has been incorrectly configured as the root bridge
B. Thecustomer has used the default MSTP region configuration
C. The VLAN to instance mapping is not the same on all switches.
D. Core-1 and Core-2 are not running the same firmware
E. ToR-1uplinks and downlinks are both running spanning-tree port-type admin-network.

Answer: B,C

Explanation:
The question involves Acme Corp experiencing performance degradation due to overutilized uplinks from ToR-1 to Core-1 and Core-2, with a diagram (not provided) indicating a potential MSTP (Multiple Spanning Tree Protocol) issue. The task is to identify valid reasons for uplink overutilization.
* Analysis of Options:
* Option A:Incorrect. Incorrect root bridge configuration (e.g., Core-2 as root) may cause suboptimal paths but is not directly linked to uplink overutilization without further context.
* Option B:Correct. Inconsistent VLAN-to-instance mappings across switches can cause MSTP to block unexpected ports, funneling traffic through fewer uplinks and causing overutilization.
* Option C:Incorrect. Firmware mismatches may cause compatibility issues but are unlikely to directly cause uplink overutilization.
* Option D:Correct. Using the default MSTP region configuration (e.g., default region name and revision) across switches can lead to all switches forming a single MSTP region, potentially causing suboptimal topology and uplink overuse.
* Option E:Incorrect. Running MSTP with admin-network port-type on uplinks and downlinks is not a standard cause of overutilization; it's a specific port role.
* Why B and D are Correct:MSTP relies on consistent region configurations (region name, revision number, VLAN-to-instance mappings) to create efficient topologies. If VLAN-to-instance mappings differ (Option B), switches treat each other as separate regions, leading to blocked ports and traffic concentration on fewer uplinks, causing overutilization. Similarly, using the default MSTP region configuration (Option D) without customizing the region name or revision can result in all switches forming a single region with suboptimal spanning tree instances, potentially overloading specific uplinks. Both issues disrupt MSTP's ability to balance traffic across redundant paths, aligning with HPE Aruba Networking's MSTP troubleshooting scenarios.
* Relevance to Certification Objectives:
* Network Resiliency and Virtualization (8%):Troubleshooting MSTP for redundancy and fault tolerance.
* Switching (19%):Diagnosing Layer 2 issues, including MSTP misconfigurations.
* Performance Optimization (6%):Remediating uplink utilization issues.
References:
HPE Aruba Networking AOS-CX Configuration Guide: MSTP Configuration, detailing region and VLAN mapping.
HPE7-A06Study Guide: Covers MSTP troubleshooting and optimization.
HPE Aruba Networking Technical Documentation: MSTP Best Practices and Troubleshooting.

NEW QUESTION # 65
Refer to the exhibit and cede sample.

What is the effect when you add thestatement "neighbor 10.2.0.3 send-community both" to the ipv4 address family? (Select two.)

A. It causes R1 to negotiate the ability to send and receive standard and extended communities with R2.
B. The feature will be enabled without consequence to the R1established session with R2.
C. Itcauses R1to allow the exchange ofcommunities with NLRI records in both inbound and outbound direction
D. It causes R1to negotiate for the ability to import and export all type-1 and lype-2 communities with R2.
E. It will cause existing BGP peering between R1and R2 to flap.

Answer: A,E

Explanation:
The question asks for the effects of adding the command neighbor 10.2.0.3 send-community both to the BGP configuration under the IPv4 address family context for neighbor R2 (10.2.0.3) on router R1.
* send-community both:This command instructs R1 to send both standard (RFC 1997) and extended (RFC 4360) BGP community attributes to neighbor R2. By default, communities are not sent.
* BGP Capability Negotiation:Adding or changing features like community advertisement modifies the BGP capabilities exchanged between neighbors during session establishment. Any change to these capabilities requires the BGP session to be reset (flap) so that the peers can renegotiate using the new capabilities.
* Analysis of Options (Select Two):
* A: Correct (partially). It enables R1 tosendstandard and extended communities. The ability to receivedepends on the peer and local config. The capability isnegotiatedupon session reset.
* B: Incorrect. Changing capabilities requires the session to flap; it's not without consequence.
* C: Incorrect. It primarily enablesoutboundsending from R1. Inbound acceptance is implicit if the neighbor is activated.
* D: Correct. Modifying BGP neighbor capabilities, such as enabling send-community, necessitates a BGP session reset (flap) for the change to take effect.
* E: Incorrect terminology ("import/export", "type-1/type-2 communities").
* Conclusion:The command enables R1 to send communities (A describes the purpose/capability), and adding this command to an existing session will cause the session to flap for renegotiation (D describes the immediate consequence).
References:RFC 1997, RFC 4360, AOS-CX BGP Configuration Guide (communities, neighbor configuration). This relates to the "Routing" (16%) objective.

NEW QUESTION # 66
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