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Configuration Guide - IP Service
S1720, S2700, S5700, and S6720 V200R011C10

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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Typical Networking of the DHCPv6 PD Server

Typical Networking of the DHCPv6 PD Server

Figure 12-11 shows a typical networking of the DHCPv6 PD server.

Figure 12-11  Networking of the DHCPv6 PD server

The device functions as the DHCPv6 PD server to assign IPv6 address prefixes to DHCPv6 PD clients.

The DHCPv6 PD mechanism allows SwitchB to function as a DHCPv6 PD client to request IPv6 prefixes from the DHCPv6 PD server and allows the DHCPv6 PD server to assign prefixes to SwitchB. In this way, SwitchB does not need to assign IPv6 prefixes for user-side links. SwitchB divides the obtained prefix (the length of the obtained prefix is smaller than 64 bits) into 64-bit prefix of subnet segments and sends an RA message on the link that hosts directly connect to. The RA message contains 64-bit prefix of subnet segments. This enables hosts to automatically configure addresses.

Updated: 2020-02-26

Document ID: EDOC1000178170

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