IPv6 Addressing Configuration

Enabling Automatic Configuration of a Global Unicast Address and a Default Router Identity on a VLAN

— Continued from the previous page. —

After verification of uniqueness by DAD, an IPv6 address assigned to a VLAN by autoconfiguration is set to the preferred and valid lifetimes specified by the RA used to generate the address, and is configured as a preferred address. (Refer to “IPv6 Address Deprecation” on page 3-25.)

Default: Disabled.

The no form of the command produces different results, depending on how IPv6 is configured on the VLAN:

If IPv6 was enabled only by the autoconfig command, then deleting this command disables IPv6 on the VLAN. (Refer to “Disabling IPv6 on a VLAN” on page 4-16.)

To view the current IPv6 autoconfiguration 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

With IPv6 enabled, the VLAN uses received router advertisements to designate the default IPv6 router. (Refer to “Router Access and Default Router Selection” on page 4-27.)

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