网络接口（NIC）接收（RX）错过错误

  • 1920年9月18日
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有时，通过管理程序主机的正常运行，网络接口（NIC）可能变得“不堪重负”，并且无法响应足够快的流量，以便由上游网络交换机服务。这种条件导致帧，随后从主机的接收缓冲区丢弃，无法处理或“错过”。

虽然当主机（和/或来自主机的下游元件，如VM）“未命中”网络流量时一般不是很好的情况，但许多应用程序足够强大，以便不时处理一些未命中。但是，如果这种情况频繁和/或永久性，则可能导致生产问题，并且将相应地从棱镜展出报警。

要打击频繁/永恒条件，有几种可用选项。对于ESX和Hyper-V主机，可以简单地增加NIC的接收缓冲区大小。对于AHV主机，而不是增加接收缓冲区大小，建议使用可用上行链路中的负载平衡。可以从AHV上行链路跨越AHV上行链路的更多信息绑定接口中的负载平衡子部分AHV最佳实践指南。

Sometimes, through the normal operation of a hypervisor host, network interfaces (NICs) can become \u201coverwhelmed\u201d and be unable to respond to traffic fast enough as being served by an upstream network switch. This condition results in frames, which are subsequently being dropped from the receive buffer of the host, to go unprocessed or \u201cmissed\u201d.<\/span><\/p>

Though it is generally not a good situation when a host (and\/or a downstream element from the host, like a VM) \u201cmisses\u201d network traffic, many applications are robust enough to handle a few misses from time to time. However, if this condition is frequent and\/or perpetual, it can cause production issues and alarms would be exhibited from Prism accordingly.<\/span><\/p>

To combat a frequent\/perpetual condition, there are several available options. For ESX and Hyper-V hosts, the receive buffer size of NICs can simply be increased. For AHV hosts, instead of increasing the receive buffer size, it is recommended to employ load-balancing across the available uplinks. More information regarding load balancing across AHV uplinks can be found from the <\/span>Load Balancing Within Bond Interfaces<\/u><\/a> sub-section of the <\/span>AHV Best Practices Guide<\/u><\/a>.<\/span><\/p>","quoteUsername":"Garet","translations":{"Common":{"like":"Like","unlike":"Unlike"},"Forum":{"Quote":"Quote","Share":"Share"}}}">

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