Cisco ASA 5505 - Manual (Page 539)

C H A P T E R
28-1
Cisco ASA 5500 Series Configuration Guide using the CLI
28
Configuring IPv6 Neighbor Discovery
This chapter describes how to enable and configure IPv6 neighbor discovery on the ASA and includes
the following sections:
• Information About IPv6 Neighbor Discovery, page 28-1
• Licensing Requirements for IPv6 Neighbor Discovery, page 28-4
• Guidelines and Limitations, page 28-4
• Default Settings for IPv6 Neighbor Discovery, page 28-6
• Configuring the Neighbor Solicitation Message Interval, page 28-7
• Configuring the Neighbor Reachable Time, page 28-7
• Configuring the Router Advertisement Transmission Interval, page 28-8
• Configuring the Router Lifetime Value, page 28-8
• Configuring DAD Settings, page 28-9
• Configuring IPv6 Addresses on an Interface, page 28-9
• Suppressing Router Advertisement Messages, page 28-10
• Configuring the IPv6 Prefix, page 28-11
• Configuring a Static IPv6 Neighbor, page 28-12
• Monitoring IPv6 Neighbor Discovery, page 28-13
• Additional References, page 28-13
• Feature History for IPv6 Neighbor Discovery, page 28-14
Information About IPv6 Neighbor Discovery
The IPv6 neighbor discovery process uses ICMPv6 messages and solicited-node multicast addresses to
determine the link-layer address of a neighbor on the same network (local link), verify the readability of
a neighbor, and keep track of neighboring routers.
Nodes (hosts) use neighbor discovery to determine the link-layer addresses for neighbors known to
reside on attached links and to quickly purge cashed values that become invalid. Hosts also use neighbor
discovery to find neighboring routers that are willing to forward packets on their behalf. In addition,
nodes use the protocol to actively keep track of which neighbors are reachable and which are not, and to
detect changed link-layer addresses. When a router or the path to a router fails, a host actively searches
for functioning alternates.