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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