Cisco ASA 5505 Configuration Manual page 287

Chapter 9 Configuring Basic Settings
Configuring the Link-Local Addresses Automatically
If you only need to configure a link-local address and are not going to assign any other IPv6 addresses,
you have the option of generating the link-local addresses based on the interface MAC addresses
(Modified EUI-64 format). To manually assign the link-local address, see the
Link-Local Address on an Interface (Transparent Firewall Mode)" section on page
To automatically configure the link-local addresses for all interfaces, perform the following steps:
Go to Configuration > Device Management > Management Access > Management IP Address.
Step 1
In the IPv6 configuration area, check Enable IPv6.
Step 2
This option enables IPv6 on all interfaces and automatically generates the link-local addresses using the
Modified EUI-64 interface ID based on the interface MAC address.
Note
To configure IPv6 DAD parameters, shown in this area, see the
page
Click Apply.
Step 3
Configuring DAD Settings
DAD verifies the uniqueness of new unicast IPv6 addresses before they are assigned and ensures that
duplicate IPv6 addresses are detected in the network on a link basis.
For information about the Enable IPv6 parameter, see the
Automatically" section on page
To specify DAD settings on an interface, perform the following steps:
Go to Configuration > Device Management > Management Access > Management IP Address.
Step 1
In the IPv6 configuration area, in the DAD attempts field, enter the number of allowed DAD attempts.
Step 2
This setting configures the number of consecutive neighbor solicitation messages that are sent on an
interface while DAD is performed on IPv6 addresses. Valid values are from 0 to 600. A zero value
disables DAD processing on the specified interface. The default is one message.
In the NS Interval field, enter the neighbor solicitation message interval.
Step 3
The neighbor solicitation message requests the link-layer address of a target node. Valid values are from
1000 to 3600000 milliseconds. The default is 1000 milliseconds.
In the Reachable Time field, enter the amount of time in seconds that a remote IPv6 node is considered
Step 4
reachable after a leachability confirmation event has occurred.
Valid values are from 1000 to 3600000 milliseconds. The default is zero. A configured time enables the
detection of unavailable neighbors. Shorter times enable detection more quickly; however, very short
configured times are not recommended in normal IPv6 operation.
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You do not need to check this option if you configure any IPv6 addresses (either global or
link-local); IPv6 support is automatically enabled as soon as you assign an IPv6 address.
Similarly, unchecking this option does not disable IPv6 if you configured IPv6 addresses.
9-17.
Setting the Management IP Address for a Transparent Firewall
"Configuring the Link-Local Addresses
9-17.
Cisco ASA 5500 Series Configuration Guide using ASDM
"Configuring the
8-30.
"Configuring DAD Settings" section on
9-17