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Annotation of cci/usr/src/man/man4/arp.4p, revision 1.1

1.1     ! root        1: .TH ARP 4P "18 July 1983"
        !             2: .UC 4
        !             3: .SH NAME
        !             4: arp \- Address Resolution Protocol
        !             5: .SH SYNOPSIS
        !             6: .B pseudo-device ether
        !             7: .SH DESCRIPTION
        !             8: ARP is a protocol used to dynamically map between DARPA Internet
        !             9: and 10Mb/s Ethernet addresses on a local area network.  It is
        !            10: used by all the 10Mb/s Ethernet interface drivers and is not
        !            11: directly accessible to users.
        !            12: .PP
        !            13: ARP caches Internet-Ethernet address mappings.  When an interface
        !            14: requests a mapping for an address not in the cache, ARP queues the
        !            15: message which requires the mapping and broadcasts
        !            16: a message on the associated network requesting the address mapping.
        !            17: If a response is provided, the new mapping is cached and any pending
        !            18: messages are transmitted.  ARP itself is not Internet or Ethernet
        !            19: specific; this implementation, however, is.  ARP will queue
        !            20: at most one packet while waiting for a mapping request to be responded to;
        !            21: only the most recently ``transmitted'' packet is kept.
        !            22: .PP
        !            23: ARP watches passively for hosts impersonating the local host (i.e. a host
        !            24: which responds to an ARP mapping request for the local host's address)
        !            25: and will, optionally, periodically probe a network looking for impostors.
        !            26: .SH DIAGNOSTICS
        !            27: .B "duplicate IP address!! sent from ethernet address: %x %x %x %x %x %x".
        !            28: ARP has discovered another host on the local network which responds to
        !            29: mapping requests for its own Internet address.
        !            30: .SH SEE ALSO
        !            31: ec(4), il(4)

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