Configuration of IPv6 addresses on an interface has the following conditions.
- Multiple primary IPv6
addresses from different subnets are allowed, but not from the same
subnet.
- Secondary IPv6 addresses have
the same subnet as the primary addresses.
- Primary IPv6 addresses cannot
be deleted when a secondary address is configured.
- Secondary IPv6 addresses
cannot be added when the primary address is not configured.
Take the following steps to assign IPv6 addresses. The examples in steps 2-5 are for an
Ethernet interface.
-
From privileged EXEC mode, enter global configuration mode.
device# configure terminal
-
Access the interface to which you are assigning the IP addresses.
device(config)# interface ethernet 0/2
-
Assign one or more primary IP
addresses, including the CIDR network mask.
device(config-if-eth-0/2)# ipv6 address 102:102::1/64
device(config-if-eth-0/2)# ipv6 address 202:102::1/64
-
Assign one or more secondary IP
addresses, including the CIDR network mask and the secondary
keyword.
device(config-if-eth-0/2)# ipv6 address 102:102::2/64 secondary
device(config-if-eth-0/2)# ipv6 address 202:102::2/64 secondary
-
Activate the interface.
device(config-if-eth-0/2)# no shutdown
