IPv6 Addressing Configuration

Configuring a Static IPv6 Address on a VLAN

■DHCPv6 and statically configured global unicast or anycast addresses are mutually exclusive on a given VLAN. That is, configuring DHCPv6 on a VLAN erases any static global unicast or anycast addresses previously configured on that VLAN, and the reverse. (A statically configured link- local address will not be affected by configuring DHCPv6 on the VLAN.)

■For the same subnet on the switch, a DHCPv6 global unicast address assignment takes precedence over an autoconfigured address assign­ ment, regardless of which address type was the first to be configured. If DHCPv6 is subsequently removed from the configuration, then an auto- configured address assignment will replace it after the next router adver­ tisement is received on the VLAN. DHCPv6 and autoconfigured addresses co-exist on the same VLAN if they belong to different subnets.

For related information refer to:

■RFC 3315: “Dynamic Host Configuration Protocol for IPv6 (DHCPv6)”

■RFC 3633: “IPv6 Prefix Options for Dynamic Host Configuration Protocol (DHCP) version 6”

■RFC 3736: “Stateless Dynamic Host Configuration Protocol (DHCP) Service for IPv6”

Configuring a Static IPv6 Address on aVLAN

This option enables configuring of unique, static unicast and anycast IPv6 addresses for global and link-local applications, including:

■link-local unicast (including EUI and non-EUI device identifiers)

■global unicast (and unique local unicast)

■anycast

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