Enabling DHCPv6–relay operation
For the DHCPv6 relay agent to function on the routing switch, you must complete the following steps:
Procedure
- Ensure that there is a route configured between a DHCPv6 server and the routing switch and that the server is configured to support host requests forwarded from the routing switch.
- For each VLAN on which you want the routing switch to provide DHCPv6-relay services, determine the helper addresses the relay agent should have for forwarding client DHCPv6 requests to reachable DHCPv6 servers. You can configure one or more helper addresses and can use either or both of the following types:
- In each VLAN context where DHCPv6-relay service is needed, use the
ipv6 helper-address unicast / multicast
command to configure one or more DHCPv6 helper addresses. - In the global
config context, use the
dhcpv6-relay
command to globally enable DHCPv6 relay on the routing switch. - If IPv6 routing is not already
enabled on the routing switch, use the
ipv6 unicast-routing
command in the global config context to enable IPv6 routing. - On each VLAN where you have configured a helper address, ensure that the target DHCPv6 server is reachable.