KB.15.15

ManualsBrandsHP ManualsNetwork HardwareHP 5406R-8XGT/8SFP+ (No PSU) v2 zl2 Switch

201

202

203

204

205

206

207

208

209

210

9 DHCPv6-Relay

NOTE: All commands previously in the Summary of commands table are indexed under the entry

Command syntax.

For introductory information on DHCPv6-relay, see “About configuring DHCPv6 relay” (page 206).

Configuring DHCPv6-relay

DHCPv6-relay is disabled by default. To enable and configure it, use the commands in this section:

Syntax:

[no] dhcpv6-relay

Used in the global config context to enable DHCPv6-relay globally on the routing

switch.

The no form disables DHCPv6-relay operation on the routing switch.

Default: Disabled

NOTE: To use DHCPv6-relay on a given VLAN, at least one IPv6 helper-address

must be configured on the VLAN, and IPv6 routing (ipv6 unicast-routing)

must be enabled.

Syntax:

[no] ipv6 helper-address unicast ipv6-unicast-helper-addr

[no] ipv6 helper-address multicast [ all-dhcp-servers |

ipv6-multicast-helper-addr ] [ egress vlan vid ]

Used in the VLAN context to enable DHCPv6-relay operation on the VLAN, and to

specify either a unicast or multicast DHCPv6-relay helper address for forwarding

DHCPv6 service requests from hosts on the subject VLAN.

ipv6-unicast-helper-addr

Specifies the global unicast address of a remote DHCPv6 server configured to

support hosts on the indicated VLAN.

all-dhcp-servers

Specifies that the routing switch forward host requests for DHCPv6 service to

multicast address FF05::1:3 via the VLAN specified by egress vlan vid

egress vlan vid

Specifies the VLAN on which DHCPv6 service requests forwarded to a multicast

destination will be relayed. The egress VLAN must be a different VLAN than

the one on which the multicast helper address is configured.

A service request relayed on the egress VLAN to a downstream router remains

in that VLAN unless the downstream router is configured on that VLAN with a

unicast helper address for a server on another VLAN. See the example in

Figure 20 (page 208).

Using the no form of the command removes the specified helper address.

Removing all helper addresses from a given VLAN disables DHCPv6-relay on

that VLAN.

NOTE: DHCPv6-relay operation must be enabled with dhcpv6-relay at

the global config level.

Configuring DHCPv6-relay 203