NDP(7P)NDP(7P)NAMEndp - Neighbor Discovery Protocol
DESCRIPTION
NDP is a protocol used to dynamically map between IPv6 Internet and
device addresses such as Ethernet addresses. It is used by all the
Ethernet interface drivers. Although this man page describes its use
with Ethernet, it is not specific to Ethernet.
NDP caches Internet-Ethernet address mappings. When an interface
requests a mapping for an address not in the cache, NDP queues the
message which requires the mapping and multicasts a message on the
associated network requesting the address mapping. If a response is
provided, the new mapping is cached and any pending message is
transmitted. Each address mapping has a timer associated with it and
completed address mappings are aged. The timer is reset each time the
address mapping is updated by sending a packet to the Internet address to
which the mapping belongs. NDP will queue at most one packet while
waiting for a mapping request to be responded to; only the most recently
``transmitted'' packet is kept.
NDP entries may be added, deleted or changed with the ndps command.
SEE ALSOinet6(7F), ndp(1M), ndpd(1M), ifconfig(1M),
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