|IN.NDPD(8)||Maintenance Commands and Procedures||IN.NDPD(8)|
/usr/lib/inet/in.ndpd [-adt] [-f config_file]
Other aspects of Neighbor Discovery are implemented by ip6(4P), including:
The duplicate address detection function is implemented by the system kernel.
in.ndpd is managed by the service management facility (SMF), by means of the service identifier:
If the /etc/inet/ndpd.conf file does not exist or does not set the variable AdvSendAdvertisements to true for a network interface, then in.ndpd will make the node a host for that interface, that is, sending router solicitation messages and then using router advertisement messages it receives to autoconfigure the node. Note that in.ndpd only autoconfigures the addresses of global or site-local scope from the prefix advertisement.
If AdvSendAdvertisements is set to true for an interface, then in.ndpd will perform router functions on that interface, that is, sending router advertisement messages to autoconfigure the attached hosts, but not use any advertisements it receives for autoconfiguration. However, when sending advertisements, in.ndpd will use the advertisements it sends itself to autoconfigure its prefixes.
Stateless autoconfiguration requires no manual configuration of hosts, minimal (if any) configuration of routers, and no additional servers. The stateless mechanism enables a host to generate its own addresses and uses local information as well as non-local information that is advertised by routers to generate the addresses. in.ndpd will plumb logical interfaces for each of these addresses.
Stateful autoconfiguration involves the dhcpagent(8) daemon and the use of the DHCPv6 protocol. The dhcpagent daemon is responsible for plumbing the logical interfaces for the acquired addresses, maintaining the leases, and handling duplicate addresses. in.ndpd starts the dhcpagent daemon automatically and signals when DHCPv6 should be started. in.ndpd also detects when dhcpagent configures the logical interfaces, and sets the appropriate prefix length on each according to received Routing Advertisement messages. in.ndpd will not stop dhcpagent; use ifconfig(8) to control dhcpagent if necessary.
Temporary addresses that are autoconfigured for an interface can also be implemented. A temporary address token is enabled for one or more interfaces on a host. However, unlike standard, autoconfigured IPv6 addresses, a temporary address consists of the site prefix and a randomly generated 64 bit number. This random number becomes the interface ID segment of the IPv6 address. A link-local address is not generated with the temporary address as the interface ID.
If the kernel detects a duplicate temporary address, in.ndpd will automatically choose another.
Routers advertise all prefixes that have been assigned on the link. IPv6 hosts use Neighbor Discovery to obtain a subnet prefix from a local router. Hosts automatically create IPv6 addresses by combining the subnet prefix with an interface IDs that is generated from an interface's MAC address. In the absence of routers, a host can generate only link-local addresses. Link-local addresses can only be used for communication with nodes on the same link.
For information on how to enable IPv6 address autoconfiguration, see System Administration Guide: IP Services.
# routeadm -m ndp:default key=value
ifdefault StatefulAddrConf off ifdefault StatelessAddrConf off
Use of this option is equivalent to setting the stateless_addr_conf property to false.
Narten, T., Nordmark, E., Simpson, W. RFC 2461, Neighbor Discovery for IP Version 6 (IPv6). The Internet Society. December 1998.
Thomson, S., Narten, T. RFC 2462, IPv6 Stateless Address Autoconfiguration. The Internet Society. December 1998.
Narten, T., and Draves, R. RFC 3041, Privacy Extensions for Stateless Address Autoconfiguration in IPv6. The Internet Society. January 2001.
|September 12, 2020||OmniOS|