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Special Forums IP Networking Unable to ping the gateway IP itself Post 302105029 by stdout on Tuesday 30th of January 2007 09:50:29 AM
Old 01-30-2007
hello,

the theory of CSMA/CD - NIC will listen to link whether it is clear to transmit data or not. If it founds any traffic it will wait and check for whom the traffic destined - otherwise its turn to send data. If at the time it send data and anyone else do the same - it will drop the traffic and tell you DUP.

BUT - this is not the case - since modern NIC or OS have autonego option (or even auto-MDIX for switches) - it listen to the HUB/SWITCH what mode they operate.

i think you still should check any DUP IP.

cheers...
 

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L2TEST(1)						      General Commands Manual							 L2TEST(1)

NAME
l2test - L2CAP testing SYNOPSIS
l2test DESCRIPTION
l2test is L2CAP testing program. USAGE
l2test <mode> [options] [bdaddr] Modes: -r listen and receive -w listen and send -d listen and dump incoming data -x listen, then send, then dump incoming data -s connect and send -u connect and receive -n connect and be silent -y connect, then send, then dump incoming data -c connect, disconnect, connect, ... -m multiple connects -p trigger dedicated bonding -z information request Options: [-b bytes] [-i device] [-P psm] [-J cid] [-I imtu] [-O omtu] [-L seconds] enable SO_LINGER [-W seconds] enable deferred setup [-B filename] use data packets from file [-N num] send num frames (default = infinite) [-C num] send num frames before delay (default = 1) [-D milliseconds] delay after sending num frames (default = 0) [-X mode] select retransmission/flow-control mode [-Q num] Max Transmit value (default = 3) [-Z size] Transmission Window size (default = 63) [-F fcs] use CRC16 check (default = 1) [-R] reliable mode [-G] use connectionless channel (datagram) [-U] use sock stream [-A] request authentication [-E] request encryption [-S] secure connection [-M] become master [-T] enable timestamps AUTHOR
This manual page was written by Nobuhiro Iwamatsu <iwamatsu@debian.org>, for the Debian GNU/Linux system (but may be used by others). January 2012 L2TEST(1)
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