Configuration Guide DHCPv6 Relay Agent Configuration
DHCPv6 Relay Agent Configuration
Understanding DHCPv6 Relay Agent
DHCPv6 Overview
In the IPv6 network, DHCPv6 enables users to automatically obtain the IPv6 address and related
parameters. Without the help of the DHCPv6 Relay Agent, the DHCPv6 server can only provide service
for the DHCPv6 clients belonging to the same network segment.
A typical exchange process between the DHCPv6 server and client is shown in the Figure-1
Figure-1 DHCPv6 Server-Client
1. The DHCPv6 Client sends the Solicit packet destined to the address FF02::1:2 and
the UDP port 547 to request the DHCP service. All DHCPv6 servers in the local
network segment can receive this packet.
2. After each DHCPv6 server receives the Solicit packet, it responses the Advertise
packet in the unicast form, declaring that it can provide the DHCP service for the
client.
3. After the DHCPv6 client selects the DHCPv6 server, the client sends the Request
packet in the multicast form destined to the address FF02::1:2 and the UDP port
547 within the local network segment.
4. After the DHCPv6 server receives the Request packet, it sends the Reply packet in
the unicast form, declaring the information such as IP addresses allocated to the
DHCPv6 client.
The address FF02::1:2 is used to identify all DHCPv6 servers
and relay agents in the same network segment. The Solicit and
Request packets use this address as the destination address for
the transmission within the local network segment only.
DHCPv6 Relay Agent Overview
With the help of DHCPv6 Relay Agent, the DHCPv6 server is able to offer service to the DHCPv6 clients
in other network segments.
To Next Page
Loading...
