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Fat AP and Cloud AP V200R008C00 CLI-based Configuration Guide

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Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
FAQ About DHCP

FAQ About DHCP

How Can I Ensure that a DHCP Client Selects the Correct DHCP Server?

A DHCP client broadcasts a DHCP Discover message. When there are multiple DHCP servers including bogus DHCP servers on a network segment, the DHCP client accepts only the first received DHCP Offer message and therefore may obtain an unexpected IP address from a bogus DHCP server. To ensure that a client obtains an IP address from the correct DHCP server, configure DHCP snooping.

How Can I Configure a PC to Release and Update Its IP Address?

This section describes how to release and update a PC's IP address that is dynamically obtained using DHCP.

  • Release an IP address.

    Commands to release an IP address vary depending on the operating system. For details, see the user documentation of your operating system. The commands for some common operating systems are as follows:

    • For Windows 7, run the ipconfig/release command.
    • For MS-DOS of Windows 98, run the winipcfg/release command.
    • For Unix-like operating systems, run the dhclient –r command.

    The PC sends a DHCP Release message to instruct the DHCP server to release the IP address of the PC.

  • Renew the IP address lease time or apply for a new IP address.

    Commands to renew the IP address lease time or apply for a new IP address are the same on the same operating system. To apply for a new IP address, release the original IP address of the PC first. To renew the IP address lease time, you do not need to release the IP address in advance.

    Commands to apply for a new IP address vary depending on the operating system. For details, see the user documentation of your operating system. The commands for some common operating systems are as follows:

    • For Windows 7, run the ipconfig/renew command.
    • For MS-DOS of Windows 98, run the winipcfg/renew command.
    • For Unix-like operating systems, run the dhclient command.

    The PC sends a DHCP Discover message to apply to the DHCP server for an IP address.

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Updated: 2019-01-11

Document ID: EDOC1000176006

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