Version 6.8 127 Mediant MSBR
Configuration Guide 20. IPv6 Routing
20.5.4 Configuring Prefix Delegation
For the configuration of the prefix delegation, the interface VLAN on the LAN side needs to
know from where to receive the IPv6 prefix delegation, and the WAN interface needs to
know from where to receive DHCPv6 data. To configure prefix delegation, use the
configuration steps that are described in the following table .
Command Description
Enters the data configuration menu.
(config-data)# interface <WAN
interface>
Enters the WAN interface that is connected to
the WAN.
(conf-if-WAN int)# ipv6 dhcp-
client pd [rapid-commit]
Configures the WAN interface to receive PD
messages.
Rapid-commit – uses two-message exchange
rather than four-message exchange to obtain an
IP address according to RFC 4039.
(config-data)# interface vlan
<number>
Enters the LAN interface configuration.
(config-data)# ipv6 enable
Enables IPv6 on the interface.
(config-data)# ipv6 dhcp server
enable
Enables DHCP service on the interface.
(conf-if-VLAN <No>)# ipv6 nd pd
<WAN interface> <IPv6 Prefix>
Configures the LAN interface to obtain IPv6
prefix from the <WAN interface>.
<IPv6 Prefix> is the prefix delegated to the hosts
attached to the LAN interface. According to the
example, if the configured MSBR is on interface
VLAN 2, the prefix should be
2001:100:100:ff01::/64.
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