Bizarre ethernet problems (Interlan & 4.2 BSD)

[Steven M. Haflich]

The first problem, that a 750 reboots when its Interlan tap is
(re)connected, is well known and has been reported here before.  The tap
draws a large surge of 15V power when first connected, and the paranoid
powerfail detection in the 750 thinks that there has been a power
failure.  There is no known fix, except using a different kind of tap.
However, once your network is established and stable, will you really
need to plug and unplug taps frequently?

There is no reason for the transceiver cable to work loose at either
end.  You should strain relieve the interface end of the cable (with a
cable tie) to the CPU chassis near the interface.  It is also wise to
affix the transceiver to something solid (again, cable ties work well)
and then strain relieve the cable near it as well.  Most important, make
sure those awkward little clips on the transceiver end of the cable are
tight and working.  They can be "adjusted" a little with a screw driver.