Chapter 3 Ethernet Testing
Loopback testing
92
HST-3000 Ethernet Testing User’s Guide
7 On the near end HST, do one of the following:
– If you are looping back layer 2 traffic, proceed to
step 8.
– If you are looping back layer 3 or layer 4 traffic, specify
the far end HST’s source IP address as the destination
IP address.
8 Press the Action soft key, select Loop, and then select
Loop Up to put the far end unit in loop back mode. The
following occurs:
– A confirmation message appears on the display of the
near end unit indicating that the loopback was
successful.
– If the layer 4 loopback confirmation message
appeared, the ATP listen port (or ports for multiple
streams) on the near end are automatically populated.
– If the layer 4 loopback at the far end was successful,
and you are looping back traffic using a single stream
application, the ATP listen port on the far end is auto-
matically populated.
9 Press the Action soft key a second time, then select one
of the following:
– Start Traffic (if you configured a constant, bursty, or
flooded load).
– Start Ramp (if you configured a ramped traffic load).
Traffic is transmitted and looped through the HST on the
far end (if it passes the far end unit’s filter criteria).
To loop down the far end HST:
1 On the near end unit, press the Action soft key, then
select Stop Traffic or Stop Ramp.
2 On the near end unit, select Loop Down.
The far end unit is looped down, and a confirmation message
appears on the near end unit indicating that the loop down
was successful.
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