Chapter 3 Ethernet Testing
Using J-Proof to verify layer 2 transparency
72
HST-3000 Ethernet Testing User’s Guide
so, you must then specify the settings for the outgoing loop-
up frame. When the receiving instrument receives the loop-up
frame, it is automatically placed into transparent loopback
mode, and it returns all received test frames. You do not need
to specify filter settings on the receiving instrument.
When initiating a loopback from the traffic originating instru-
ment, you can send the loop-up frame to a specific test instru-
ment (by specifying the appropriate unicast destination
address), or you can send a broadcast loopup frame to loop-
up the first test instrument that replies within the broadcast
boundary.
When the test is completed, the far end instrument is automat-
ically taken out of loop up mode.
To verify layer 2 transparency
1 If you haven’t already done so, launch the terminate appli-
cation for the circuit you are testing (see “Launching an
application” on page 28), and then select the J-Proof test
(see “Selecting a layer 2 test” on page 46).
2 Initialize the link (see “Initializing the link for Ethernet
testing” on page 47).
3 Use the right arrow key to go to the Ethernet Loop Frame
configuration menu, and then configure the outgoing loop
frame by specifying the following
:
Setting Parameters
Source Type – Factory Default
– User Defined
Indicate whether you want
traffic generated by the
HST to carry the factory
default MAC address, or a
user defined address. If
you specify User Defined,
a Source MAC setting
appears on the menu.
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