Cisco ASA 5505 - Manual (Page 548)

28-10
Cisco ASA 5500 Series Configuration Guide using the CLI
Chapter 28 Configuring IPv6 Neighbor Discovery
Suppressing Router Advertisement Messages
Suppressing Router Advertisement Messages
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 ASA to supply the
IPv6 prefix (for example, the outside interface).
To suppress the router lifetime value in IPv6 router advertisements on an interface, enter the following
command:
Examples
The following example suppresses an IPv6 router advertisement transmission for the specified interface,
which is GigabitEthernet 0/0:
hostname (config)# interface gigabitethernet 0/0
hostname (config-if)# ipv6 nd suppress-ra 2001:DB8::/32 1000 900
Command Purpose
ipv6 nd suppress-ra seconds
Example:
hostname (config-if)# ipv6 nd suppress-ra
2001:DB8::/32 1000 900
Suppresses the router lifetime value.
The seconds argument specifies the validity of the ASA as a default router
on this interface. Valid values range from 0 to 9000 seconds. A zero
indicates that the ASA should not be considered a default router on the
specified interface.
Entering this command causes the ASA to appear as a regular IPv6
neighbor on the link and not as an IPv6 router.