Dhcpv6 Relay Messages; Dhcpv6 Relay Configuration Overview; Enabling The Dhcpv6 Relay Per-Vrf; Configuring The Dhcpv6 Relay Interface - Alcatel-Lucent OmniSwitch 9900 Series Network Configuration Manual

Configuring DHCP Relay
A maximum of five unicast or link-scoped multicast relay destinations can be configured for each
interface on which DHCPv6 Relay is enabled. The DHCPv6 relay for the interface will be automatically
disabled when all the relay destinations configured for that interface is removed.

DHCPv6 Relay Messages

Relay-Forward Messages
When the DHCPv6 relay agent receives the relay-forward message, it will verify the hop-count of the
message. If the hop-count value is greater or equal to the hop-count limit (32), the message will be
discarded and a new relay-forward message is created else the message is forwarded to the relay
destination.
Relay-Reply Messages
When the DHCPv6 relay agent connected to the client receives the relay-reply message, it verifies if the
DHCPv6 relay is enabled or disabled on the interface identified by the address in the link-address field. If
the DHCPv6 relay is disabled, the message is discarded. If the DHCPv6 relay is enabled, then the
DHCPv6 message is extracted and sent to the address contained in the relay-reply message.

DHCPv6 Relay Configuration Overview

Following sections provide the details about the DHCPv6 Relay configuration.

Enabling the DHCPv6 Relay Per-VRF

The DHCPv6 relay can operate in multiple VRFs (IPv6 multi-VRF). To enable the DHCPv6 relay on the
VRF, use the ipv6 dhcp relay admin-state
-> ipv6 dhcp relay admin-state enable
Note. Though the DHCPv6 relay is enabled on the switch, it has to be explicitly enabled on the interface,
for the DHCPv6 client messages to be relayed.

Configuring the DHCPv6 Relay Interface

An interface should be configured to relay the DHCPv6 messages received from the client. To configure
the interface, use the
-> ipv6 dhcp relay int1 admin-state enable
Note. At least one relay destination should be configured before enabling the DHCPv6 relay on an
interface.
OmniSwitch AOS Release 8 Network Configuration Guide
command. For example:
ipv6 dhcp relay interface admin-state
DHCPv6 Relay Configuration Overview
command. For example:
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