25-16
Cisco ASA 5500 Series Configuration Guide using ASDM
OL-20339-01
Chapter 25 Configuring IPv6 Neighbor Discovery
Configuring Router Advertisement Messages
b. A preferred lifetime for the prefix from the drop-down list. This setting is the amount of time that
the specified IPv6 prefix is advertised as being preferred. The maximum value represents infinity.
Valid values are from 0 to 4294967295. The default setting is 604800 (seven days).
Step 7 To define a prefix lifetime expiration date, click the Lifetime Expiration Date radio button, and specify
the following:
a. Choose a valid month and day from the drop-down list, and then enter a time in hh:mm format.
b. Choose a preferred month and day from the drop-down list, and then enter a time in hh:mm format.
Step 8 Click OK to save your settings.
The Interface IPv6 Prefixes Address field appears with the preferred and valid dates.
Suppressing Router Advertisement Messages
By default, router advertisement messages are automatically sent in response to router solicitation
messages. You may want to disable these messages on any interface for which you do not want the
adaptive security appliance to supply the IPv6 prefix (for example, the outside interface).
This section shows how to suppress IPv6 router advertisement transmissions on an interface and includes
the following topics:
• Licensing Requirements for Suppressing Router Advertisement Messages, page 25-16
• Guidelines and Limitations for Suppressing Router Advertisement Messages, page 25-16
• Default Settings for Suppressing Router Advertisement Messages, page 25-17
• Suppressing Router Advertisement Messages, page 25-17
• Feature History for Suppressing Router Advertisement Messages, page 25-17
Licensing Requirements for Suppressing Router Advertisement Messages
The following table shows the licensing requirements for this feature:
Guidelines and Limitations for Suppressing Router Advertisement Messages
This section includes the guidelines and limitations for this feature.
Context Mode Guidelines
Supported in single and multiple context mode.
Firewall Mode Guidelines
Supported in routed mode only. Transparent mode is not supported.
Model License Requirement
All models Base License.
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