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Configuration Guide - IP Service

S1720, S2700, S5700, and S6720 V200R012(C00 and C20)

This document describes the configurations of IP Service, including IP address, ARP, DHCP, DHCP policy VLAN, DNS, mDNS gateway, mDNS relay, UDP Helper, IP performance optimization, IPv6, DHCPv6, IPv6 DNS, IPv6 over IPv4 tunnel, and IPv4 over IPv6 tunnel.
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How Can I Configure a PC to Release and Update Its IP Address?

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: 2018-12-24

Document ID: EDOC1100038342

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