SNR S2989G-24TX-UPS — настройка IPv6 с помощью DHCPv6: Руководство по конфигурации [511/553]

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S2989G-24TX Operation Manual

Chapter 11 IPv6 Configuration

11-1

Chapter 11 IPv6 Configuration

11.1

DHCPv6

11.1.1

Introduction to DHCPv6

DHCPv6 [RFC3315] is the IPv6 version for Dynamic Host Configuration Protocol

(DHCP). It is a protocol that assigns IPv6 address as well as other network configuration

parameters such as DNS address, and domain name to DHCPv6 client, DHCPv6 is a

conditional auto address configuration protocol relative to IPv6. In the conditional address

configuration process, DHCPv6 server assigns a complete IPv6 address to client, and

provides DNS address, domain name and other configuration information, maybe the

DHCPv6 packet can transmit through relay delegation, at last the binding of IPv6 address

and client can be recorded by DHCPv6 server, all that can enhance the management of

network; DHCPv6 server can also provide non state DHCPv6 service, that is only assigns

DNS address and domain name and other configuration information but not assigns IPv6

address, it can solve the bug of IPv6 auto address configuration in non state; DHCPv6 can

provide extend function of DHCPv6 prefix delegation, upstream route can assign address

prefix to downstream route automatically, that achieve the IPv6 address auto assignment

in levels of network environment, and resolved the problem of ISP and IPv6 network

dispose.

There are three entities in the DHCPv6 protocol – the client, the relay and the server.

The DHCPv6 protocol is based on the UDP protocol. The DHCPv6 client sends request

messages to the DHCP server or DHCP relay with the destination port as 547, and the

DHCPv6 server and relay send replying messages with the destination port as 546. The

DHCPv6 client sends solicit or request messages with the multicast address – ff02::1:2 for

DHCP relay and server.

DHCPv6 CLIENT

Figure 11-1 DHCPv6 negotiation

When a DHCPv6 client tries to request an IPv6 address and other configurations from

DHCPv6 SERVER

Solicit (Muticast)

Advertise (Unicast)

Request (Muticast)

Reply (Unicast)