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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.)

4-10

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