Ruijie RG-S2900G-E Series, Руководство по настройке

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Configuration Guide DHCPv6 Snooping Configuration
DHCPv6 Snooping Configuration
Overview
DHCPv6
As IPv6 network is growing, IPv6 network-based applications are popularized gradually. As the framework put
forward in the initial design stage of IPv6, automatic configuration of nodes is the key point of IPv6 network.
Stateless configuration and stateful configuration come into being in the new network framework. With
stateless automatic configuration, the newly added nodes in a network can be configured through route
advertisement. With statefull automatic configuration, on the other hand, network nodes configure their
addresses and other parameters by interacting with the configuration server in the network. As the unique
statefull configuration mode at present, DHCPv6 is detailed in RFC3315. Below illustrates a typical DHCPv6
interaction process.
Solicit
Advertise
Request
Reply
DHCPv6
Client
DHCPv6
Server
Figure 1 Typical DHCPv6 interaction process
1 The DHCPv6 client sends a multicast solicitation message with the destination IP address of
FF02::1:2 and the destination UDP port of 547 through a local link. All the DHCPv6 server
and the DHCPv6 relays along this link will receive this message.
2 Upon receiving the multicast solicitation message, the DHCPv6 server unicasts an advertisem
ent response message.
3 After selecting the server, the DHCPv6 client sends a multicast request message with the de
stination IP address of FF02::1:2 and the destination UDP port of 547 through a local link.
4 Upon receiving the multicast request message, the DHCPv6 server unicasts a reply message.
DHCPv6 Snooping
DHCPv6 Snooping snoops the DHCPv6 interaction messages between the DHCPv6 clients and the DHCPv6
server, and filters the response packets from illegal servers under reasonable configuration.