Chapter 9 Troubleshooting
Resolving problems
HST-3000 Ethernet Testing User’s Guide
251
I suspect there is
something wrong
with my cable.
The cable may not be
inserted properly, the wrong
cable may be inserted, or a
broken cable may be con-
nected.
Use the HST cable diagnos-
tics test to determine the
nature of the problem. For
details, see “Running cable
diagnostics” on page 42.
Hard loopback at
the far end is failing.
After establishing a hard
loopback on a device at the
far end of the network, traffic
is not looped back to the
HST on the near end.
– If you are testing on a
switched Ethernet net-
work, you must use two
HSTs as end stations on
a circuit.
– If you are performing a
layer 3 IP loopback test
on an Ethernet network
that doesn’t support
VLAN tagging, and you
transmit VLAN tagged
traffic, the loopback will
fail. Reconfigure the HST
to transmit untagged traf-
fic.
NOTE: If you are testing on
an unswitched Ethernet net-
work, you can use a hard
loopback at the far end of
the circuit.
Table 14 Problems and resolutions (Continued)
Problem Description Resolution
To Next Page
Loading...
