Cli Examples - Dell PowerConnect M6348 Configuration Manual

causes DHCPv6 clients to send the DHCPv6 "Information Request" message in response. A DHCPv6
server then responds by providing only networking definitions such as DNS domain name and server
definitions, NTP server definitions, and/or SIP definitions.
RFC 3315 also describes DHCPv6 Relay Agent interactions, which are very much like DHCPv4 Relay
Agents. Additionally, there is a DHCPv6 Relay Agent Option Internet draft [9], which employs very
similar capabilities as those described by DHCPv4 Relay Agent Option in RFC 2132.
With the larger address space inherent to IPv6, addresses within a network can be allocated more
effectively in a hierarchical fashion. DHCPv6 introduces the notion of "prefix delegation" as described in
RFC 3633 [8] as a way for routers to centralize and delegate IP address assignment. The following
diagram depicts a typical network scenario where prefix delegation is used.
Figure 6-2. DHCPv6 Prefix Delegation Scenario
PE Router
DHCPv6
PD Server
General Prefix (such as /48)
In Figure 6-2, the PE router acts as Prefix Delegation server and defines one or more "general" prefixes to
delegate to a CPE router acting as a Prefix Delegation client. The CPE router then can then allocate
more specific addresses within the given general prefix range to assign to its local router interfaces. The
CPE router can in turn use the given general prefix in allocating and assigning addresses to host
machines that may be utilizing IPv6 auto-address configuration or acting as DHCPv6 clients.

CLI Examples

DHCPv6 is disabled by default and can be enabled using the following CLI configuration:
Enable DHCPv6:
console# config
Service dhcpv6
exit
CPE Router
DHCPv6
Server
DHCPv6
PD to Client
DHCPv6
Server
General Prefix (such as /64)
Host
DHCPv6
Client
Host
DHCPv6
Client
131
IPv6