CANOGA PERKINS 9145E Standard NID Software Version 1.0 - Manual (Page 46)

9145E 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 9145E; all packets not
addressed to the Loop Test MAC Address are dropped. The 9145E can be configured to swap origination
and destination MAC addresses of the test packets and to recalculate 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.
At the Diagnostics menu, select Loopback Setup (1) and press Enter. The Loopback Setup screen (Figure
4-2) opens. Type the number of the function to change, and press Enter. Cycle through the available
settings using the Space Bar. Once the setting has been selected, press Enter to lock it. 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
4.2 Latency/Jitter Test
The Latency/Jitter Test screen, is used to initiate tests that measure network latency, inter-frame jitter and
frame loss from the local 9145E to a remote 9145E or other IP agent. At the Diagnostics menu, select
Latency/Jitter Test (2) and press Enter. The Latency/Jitter Test screen (Figure 4-3) opens.
Beneath the Maximum Latency and Maximum Jitter test results are the Far End P-Bit Sent/Rcvd, Local P-
Bit Sent/Rcvd, Far End DSCP Sent/Rcvd, and Local DSCP Sent/Rcvd. This data is used to determine if
the programmed Packet Priority or DSCP was changed during the Round Trip between the local 9145E
and the destination 9145E (far end). Only a 9145 or 9145E destination can provide the Far End PBit/DSCP
function.
Canoga Perkins Corp. Ethernet Network Interface Device 21-APR-2009
Model 9145E-404-8-0 V01.00 F506 16:27:22
------------------------------------LOOPBACK SETUP-----------------------------
Loop Test MAC Address: 00 40 2A 02 47 2D
1) Loopback State Disabled
2) Swap MAC Address
at Loopback Point? Yes
3) Recalculate CRC
at Loopback Point? Yes
Select [1-3]:
------------------------------------Messages-----------------------------------