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Cisco ASA 5500 Series Configuration Guide using ASDM
OL-20339-01
Chapter 25 Configuring IPv6 Neighbor Discovery
Configuring Router Advertisement Messages
Additional Guidelines and Limitations
The router lifetime value is included in all IPv6 router advertisements sent out the interface. The value
indicates the usefulness of the adaptive security appliance as a default router on this interface.
Setting the value to a non-zero value indicates that the adaptive security appliance should be considered
a default router on this interface. The no-zero value for the router lifetime value should not be less than
the router advertisement interval.
Default Settings for Suppressing Router Advertisement Messages
Table 25-10 lists the default settings for neighbor reachable time parameters.
Suppressing Router Advertisement Messages
To suppress IPv6 router advertisement transmissions on an interface, perform the following steps:
Step 1 Choose Configuration > Device Setup > Interfaces.
Step 2 Select the interface for which you want to configure the lifetime value. The interface must have been
configured with an IPv6 address. For more information, see the “Configuring IPv6 Addresses on an
Interface” section on page 25-6.
Step 3 Click Edit.
The Edit Interface dialog box appears with three tabs: General, Advanced, and IPv6.
Step 4 Click the IPv6 tab.
Step 5 Check the Suppress RA check box.
Step 6 Verify that the router advertisement message is suppressed on the interface that is configured for the IPv6
address.
Feature History for Suppressing Router Advertisement Messages
Table 25-11 lists the release history for this feature.
Table 25-10 Default for Suppressing Router Advertisement Parameters
Parameters Default
router lifetime The default lifetime is 1800 seconds. Setting the
value to 0 indicates that the adaptive security
appliance should not be considered a default router
on this interface.
Table 25-11 Feature History for Suppressing Router Advertisement Messages
Feature Name Releases Feature Information
Suppressing router advertisement messages 7.0(1) The feature was introduced.
The ipv6 nd ra-lifetime command was introduced.
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