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31-9
Cisco ASA 5500 Series Configuration Guide using ASDM
Chapter 31 Configuring IPv6 Neighbor Discovery
Configuring IPv6 Addresses on an Interface
Step 5 Enter the interval between IPv6 router advertisement transmissions. Valid values are from 3 to 1800
seconds. The default is 200 seconds. To have the router advertisement transmission interval be listed in
milliseconds, check the RA Interval in Milliseconds check box.
Step 6 To allow the generation of addresses for hosts, make sure that the Suppress RA check box is unchecked.
This is the default setting if IPv6 unicast routing is enabled. To prevent the generation of IPv6 router
advertisement transmissions, check the Suppress RA check box.
Configuring IPv6 Addresses on an Interface
To configure IPv6 addresses on an interface, perform the following steps:
Step 1 If you have not configured any IPv6 addresses with the CLI, to enable IPv6 addressing, check the Enable
IPv6 check box.
Step 2 To make sure that the source addresses of IPv6 packets received on that interface are verified according
to the source MAC addresses to ensure that the interface identifiers use the modified EUI-64 format,
check the Enforce EUI-64 check box. If the interface identifiers do not conform to the modified EUI-64
format, an error message appears.
Step 3 If you are not going to assign any other IPv6 addresses, to set the link-local address manually, enter an
address in the Link-local address field. A link-local address should start with FE8, FE9, FEA, or FEB,
for example, fe80::20d:88ff:feee:6a82.
Alternatively, click the ellipsis to choose a link-local address
from the Browse Link-local address dialog box.
Step 4 After you have selected the link-local address, click OK to return to the IPv6 tab.
The selected link-local address appears in the Link-local address field.
Step 5 To enable address autoconfiguration, check the Enable address autoconfiguration check box. During
the stateless autoconfiguration process, DAD verifies the uniqueness of new unicast IPv6 addresses
before the addresses are assigned to interfaces (the new addresses remain in a tentative state while DAD
is performed). DAD is performed first on the new link-local address. When the link-local address is
verified as unique, then DAD is performed all the other IPv6 unicast addresses on the interface.
Step 6 In the Interface IPv6 Addresses area, click Add.
The Add IPv6 Address for Interface dialog box appears.
Step 7 (Optional) Check the EUI-64 check box.
Step 8 Click OK to save your settings.
The Interface IPv6 Addresses Address field appears with the modified EUI-64 address.
Note You cannot use IPv6 addresses for the failover LAN and state links. For more information, see
the “Configuring Failover with the High Availability and Scalability Wizard” section on
page 7-3.