"DHCP...." followed by "PXE-E55: proxyDHCP did not reply to request on port 4011&qu

本文探讨了PXE客户端启动过程中出现的PXE-E55错误现象,该错误表明PXE客户端向代理DHCP服务器发送请求后未收到回复。文章详细分析了问题产生的原因,并提供了两种解决方案:一是当DHCP与代理DHCP服务运行于不同机器时,应在DHCP配置中禁用DHCP类标识符选项#60;二是当两项服务在同一台机器上运行时,需正确设置DHCP类标识符选项#60。

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SYMPTOM

When being started, the PXE client comes up with the PXE copyright message, then displays

DHCP....

After a while, the following error message is displayed:

PXE-E55: proxyDHCP did not reply to request      on port 4011

Depending on the PXE client's system setup boot device list configuration, the PC then either stops or tries to boot from the next boot device in the system setup boot device list.

CAUSE

The "PXE-E55" error indicates that the PXE client      has sent a request to the proxyDHCP server on port 4011, but did not receive      a reply. This problem can only occur when the DHCP Class Identifier Option      #60 is set on the DHCP server, but there is no proxyDHCP service running      on port 4011 on the same machine.

RESOLUTION

If you are operating DHCP and proxyDHCP services on different      machines, do not set the DHCP Class Identifier Option      #60 in the DHCP configuration, and let both services run on port 67/udp      (bootps).

If you are operating DHCP and proxyDHCP services on the same       machine,  set the DHCP Class Identifier Option #60 in      the DHCP configuration. Let the DHCP service run on port 67/udp, and the      proxyDHCP service on port 4011/udp.


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