CANOGA PERKINS 9145EMP NID Software Version 3.1 - Manual (Page 54)

9145EMP NID Software User’s Manual Diagnostics
Loopback Setup
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4.1 Loopback Setup
The Loopback Setup screen is used to configure and initiate loopback diagnostics. Packets are
looped back at the User or Network port based on the Loop Test MAC address of the 9145EMP;
all packets not addressed to the Loop Test MAC Address are dropped. The 9145EMP can be
configured to swap origination and destination MAC addresses of the test packets and to recal-
culate the CRC of the looped packet when the MAC addresses are swapped, so the loopback
packet can successfully navigate through the network back to the test originator.
Loopback can be enabled only on one port at a time. Loopback must be cleared before moving
another port into loopback mode.
At the Diagnostics menu, type 1 and press Enter. The Loopback Setup screen (Figure 4-2)
opens. Type the number of the function to change, and press Enter. Press the Space bar to
select a setting and then press Enter. Continue to modify the settings as required. To return to
the Diagnostics menu, press Esc.
NOTE: Do not swap the source and destination and recalculate the CRC.
Figure 4-2 Loopback Setup screen
Canoga Perkins Corp. Ethernet Network Interface Device 29-JAN-2009
Model 9145EMP-761-0-0 V07.11 F7 11:20:59
------------------------------------LOOPBACK SETUP-----------------------------
Loop Test MAC Address: 00 40 2A 01 EE 11
1) Loopback State Disabled
2) Swap MAC Address
at Loopback Point? Yes
3) Recalculate CRC
at Loopback Point? Yes
Select [1-3]:
------------------------------------Messages-----------------------------------