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NEW QUESTION # 44
VPLEX Metro has been added to an existing HP OpenView network monitoring environment. The VPLEX SNMP agent and other integration information have been added to assist in the implementation. After VPLEX is added to SNMP monitoring, only the remote VPLEX cluster is reporting performance statistics.
What is the cause of this issue?
Answer: D
Explanation:
When VPLEX Metro is added to an existing HP OpenView network monitoring environment and only the remote VPLEX cluster is reporting performance statistics, the likely cause is a misconfiguration of the SNMP agent on the local VPLEX cluster management server.
* SNMP Agent Configuration: The SNMP (Simple Network Management Protocol) agent on the VPLEX management server must be correctly configured to communicate with the HP OpenView monitoring system. If the local cluster's SNMP agent is misconfigured, it may not report performance statistics correctly1.
* Troubleshooting Steps: To resolve this issue, the following steps should be taken:
* Verify the SNMP configuration on the local VPLEX cluster management server.
* Check for any discrepancies in the SNMP version, community strings, and allowed hosts between the local and remote clusters.
* Ensure that the SNMP service is running and properly configured to send traps and fetches to the HP OpenView system1.
* Firewall and Network Checks: Although TCP Port 443 is important for secure communications, it is not typically used for SNMP, which usually operates over UDP ports 161 and 162. Therefore, a blockage of TCP Port 443 would not directly affect SNMP reporting1.
* HP OpenView Compatibility: While HP OpenView running SNMP version 2C could potentially cause issues with performance statistic reporting, if the remote cluster is reporting correctly, it suggests that the version of SNMP is not the issue in this case1.
* VPLEX Witness Configuration: The VPLEX Witness is not directly involved in the reporting of performance statistics to HP OpenView, so a misconfiguration of the VPLEX Witness's SNMP agent would not cause this specific issue1.
In summary, the cause of the issue where only the remote VPLEX cluster is reporting performance statistics to HP OpenView is likely due to a misconfigured SNMP agent on the local VPLEX cluster management server.
NEW QUESTION # 45
What is a prerequisite for expanding a VPLEX virtual volume using the storage volume method?
Answer: C
Explanation:
When expanding a VPLEX virtual volume using the storage volume method, it is essential that the virtual volume is mapped 1:1 to a storage volume. This means that each virtual volume corresponds to a single storage volume on the back-end array.
* 1:1 Mapping: A 1:1 mapping ensures that there is a direct relationship between the virtual volume in VPLEX and the underlying storage volume. This is necessary for the VPLEX system to correctly expand the virtual volume when the back-end storage volume is expanded1.
* Expansion Process: To expand the virtual volume, the corresponding back-end storage volume is first expanded using the array's native tools or interfaces. Once the back-end volume is expanded, VPLEX can recognize the additional capacity and expand the virtual volume accordingly1.
* Consistency with Back-End: The expansion of the virtual volume must reflect the actual physical expansion of the storage volume to maintain data integrity and consistency1.
* Storage Volume Method: The storage volume method refers to the process of expanding the physical storage volume on the back-end array, which is then reflected in the virtual volume presented by VPLEX1.
* Documentation Reference: For detailed instructions on expanding virtual volumes using the storage volume method, administrators should refer to the SolVe Desktop Procedure Generator document on
'How to Expand a virtual volume' provided by Dell1.
In summary, the prerequisite for expanding a VPLEX virtual volume using the storage volume method is that the virtual volume must be mapped 1:1 to the storage volume. This mapping is crucial for the expansion process to be carried out successfully.
NEW QUESTION # 46
During VPLEX installation, four 78 GB metadata volumes have to be assigned to the VPLEX back-end ports.
How are these volumes used?
Answer: B
Explanation:
During the VPLEX installation, metadata volumes play a critical role in the system's operation. Here's how the four 78 GB metadata volumes are utilized:
* Meta-Volume Configuration: Two of the metadata volumes are mirrored to create the active meta-volume. This mirroring provides redundancy, ensuring that metadata, which is essential for the operation of VPLEX, is protected against single points of failure1.
* Backup Meta-Volumes: The other two metadata volumes are used as backups for the meta-volume.
They are used in an alternating fashion, which means that they can be rotated to maintain a fresh and consistent backup of the meta-volume1.
* Importance of Metadata: The metadata in VPLEX contains information about the virtual volumes, mappings, and other configuration details that are crucial for the system's virtualization capabilities1.
* System Resilience: By having mirrored meta-volumes and alternating backup volumes, VPLEX ensures high availability and resilience, which is critical for maintaining continuous operations and data integrity1.
* Operational Continuity: In the event of a failure or corruption of the active meta-volume, VPLEX can quickly switch to one of the backup volumes, minimizing downtime and maintaining operational continuity1.
In summary, the four 78 GB metadata volumes assigned to the VPLEX back-end ports during installation are used to create a mirrored meta-volume and provide alternating backups, ensuring system resilience and data integrity.
NEW QUESTION # 47
A storage administrator has just been informed by their network team that a WAN outage has been restored.
How can the administrator verify that their VPLEX Metro WAN COM link is restored?
Answer: A
Explanation:
To verify that the VPLEX Metro WAN COM link is restored, the storage administrator should run the connectivity validate-local-com command. This command checks the connectivity status of the local communication links within the VPLEX cluster.
* Command Execution: The administrator should access the VPLEX CLI and execute the connectivity validate-local-com command. This will initiate a check of the local COM ports' connectivity status1.
* Interpreting Results: After running the command, the administrator should review the output to verify that all expected connectivity is present. The output will indicate whether each local COM port is communicating as expected1.
* WAN COM Link: The WAN COM link is responsible for the communication between VPLEX clusters over a wide area network. Ensuring that the local COM links are operational is a prerequisite for the WAN COM link to function properly1.
* Post-Outage Verification: Following a WAN outage, it's crucial to confirm that the communication links are fully operational to maintain the high availability and data mobility features of VPLEX Metro1.
* Best Practices: It is recommended to follow the Dell EMC VPLEX best practices for post-outage recovery, which include running the connectivity validate-local-com command to ensure that the system is ready to resume normal operations1.
In summary, the connectivity validate-local-com command is the correct procedure to verify that the VPLEX Metro WAN COM link is restored, as it checks and confirms the presence of all expected local communication link connectivity within the VPLEX cluster.
NEW QUESTION # 48
A storage administrator wants to create an XML file to keep a record of each director's paths to storage. Which command creates an XML output file that provides this information?
Answer: C
NEW QUESTION # 49
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