To study for VMware HCI Master Specialist Exam | vSAN认证考试题目学习
72. An administrator is troubleshooting vSAN performance issues, and the performance diagnostics reports:
“There are errors seen in one or more physical NICs on one or more hosts.”
Which two problems must be resolved to fix this issue? (Choose two.)
- A. A 25 Gb/s NIC needs to be installed.
- B. There are incompatible firmware and driver versions.
- C. There is an incorrectly set MTU.
- D. The vSAN version needs to be upgraded to 7.0.
- E. A firewall is blocking ports.
Explaination:
To resolve the vSAN performance issues indicated by the error “There are errors seen in one or more physical NICs on one or more hosts,” you should consider the following two problems:
B. There are incompatible firmware and driver versions – Incompatible or outdated firmware and driver versions can lead to various issues, including errors in network interface cards (NICs). Ensuring compatibility and updating to the latest supported versions can often resolve such problems.
C. There is an incorrectly set MTU – The Maximum Transmission Unit (MTU) setting is crucial for optimal network performance. An incorrectly set MTU can lead to packet loss or fragmentation, which in turn can cause errors in NICs. Adjusting the MTU to the appropriate value for your network environment can help in resolving these errors.
The other options, while important in their own right, are less likely to be directly related to the reported NIC errors:
A. Installing a 25 Gb/s NIC is beneficial for improving overall network performance but is not directly related to the error mentioned.
D. Upgrading the vSAN version could introduce improvements and bug fixes, but it’s not specifically targeted at resolving NIC errors unless the issue is a known bug in the current vSAN version.
E. A firewall blocking ports could lead to communication issues, but it typically wouldn’t result in errors reported on the physical NICs themselves.
- 管理员正在排查 vSAN 性能问题，性能诊断报告显示：
“在一个或多个主机上的一个或多个物理 NIC 中看到了错误。”
为了解决这个问题，需要解决哪两个问题？（选择两项。）
- A. 需要安装一个 25 Gb/s 的 NIC。
- B. 存在固件和驱动版本不兼容的问题。
- C. MTU 设置不正确。
- D. 需要将 vSAN 版本升级到 7.0。
- E. 防火墙阻挡了端口。
解释：
为了解决由于“在一个或多个主机上的一个或多个物理 NIC 中看到了错误”而引起的 vSAN 性能问题，您应该考虑以下两个问题：
B. 存在固件和驱动版本不兼容的问题 – 不兼容或过时的固件和驱动版本可能导致各种问题，包括网络接口卡（NIC）中的错误。确保兼容性并更新到支持的最新版本通常可以解决这类问题。
C. MTU 设置不正确 – 最大传输单元（MTU）的设置对于优化网络性能至关重要。MTU 设置不正确可能导致数据包丢失或碎片化，进而导致 NIC 中出现错误。将 MTU 调整到适合您网络环境的适当值可以帮助解决这些错误。
其他选项虽然各自重要，但与报告的 NIC 错误直接相关的可能性较小：
A. 安装一个 25 Gb/s 的 NIC 对于提高整体网络性能有益，但与提到的错误没有直接关系。
D. 升级 vSAN 版本可能会带来改进和错误修复，但它并不是专门针对解决 NIC 错误的，除非当前 vSAN 版本中的问题是已知的错误。
E. 防火墙阻挡端口可能会导致通信问题，但通常不会导致物理 NIC 本身报告的错误。
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