IPv6 Addressing Configuration

Enabling DHCPv6

— Continued from the previous page. —

After verification of uniqueness by DAD, an IPv6 address assigned to the VLAN by an DHCPv6 server is set to the preferred and valid lifetimes specified in a router advertise­ ment received on the VLAN for the prefix used in the assigned address, and is configured as a preferred address. (Refer to the section titled “Address Lifetimes” on page 4-32.)

[rapid-commit]:Expedites DHCP configuration by using a two- message exchange with the server (solicit-reply) instead of the default four-message exchange (solicit-advertise- request- reply).

Default: Disabled

The no form of the command removes the DHCPv6 option from the configuration and, if no other IPv6-enabling command is configured on the VLAN, disables IPv6 on the VLAN. (Refer to “Disabling IPv6 on a VLAN” on page 4-16.)

To view the current IPv6 DHCPv6 settings per-VLAN, use show run.

To view all currently configured IPv6 unicast addresses, use the following:

■show ipv6 (Lists IPv6 addresses for all VLANs configured on the switch.)

■show ipv6 vlan < vid > (Lists IPv6 addresses configured on the VLAN.)

For more information, refer to “View the Current IPv6 Addressing Configura­ tion” on page 4-21.

Operating Notes

■If multiple DHCPv6 servers are available, the switch selects a server based on the preference value sent in DHCPv6 messages from the servers.

■The switch supports both DHCPv4 and DHCPv6 client operation on the same VLAN.

■DHCPv6 authentication and stateless DHCPv6 are not supported in soft­ ware release K.13.01.

■With IPv6 enabled, the switch determines the default IPv6 router for the VLAN from the router advertisements it receives. (Refer to “Default IPv6 Router” on page 4-28.)

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