XTT 5000 User's Manual
Layer 1 Throughput testing is used for verifying the quality of the physical layer
connection. Most commonly, this is done for basic point-to-point fiber connections,
whether over a single fiber pair or through a DWDM network.
As test traffic is not passing through a Layer 2 (or higher) device, a Layer 1 test can
be performed with a single STT at one end and a hardware loopback, such as a patch
cord, at the far end.
Alternatively, the test can be performed with two STT units, one at each end of the
connection.
See the
Many networks, such as Ethernet over SONET/SDH (EOS), are not true Layer 1
networks, in that they require proper Ethernet framing. Only perform a Layer 1 test
when you are certain that framing is not required. Many problems with Layer 1
testing can be corrected by performing a
.
How to Perform Layer 1 BER Testing
1. From the drop down
, select Throughput as the test type.
2. Configure the port.
Augo-Negotiation: On
Port Rate: Match the rate of the line under test; 10M, 100M, 1000M
Port Duplex: FULL
Pause: OFF
RJ-45 Polarity: AUTO
Pause Frame Delay: 0 ms
Pause: Off
Pause Frame Delay: 0 ms
Pause: Off
Pause Frame Delay: 0 ms
is on for testing.
3. Configure the
tab.
Test Type
: BERT
Test Layer
: PRBS + CRC (Layer 1 Framed)
• Set the desired frame size.
Traffic Shape
: Constant
•
Set the Constant Bandwidth at 100%.
•
Use the 2^31 test pattern.
Far End Tester Configuration
•
If performing this test between two units back-to-back, configure both units
as above.
•
If performing to a software loopback, configure the far end module as follows:
Test Mode
: LOOP BACK
Mode
: Manual
Layer
: Layer 1
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Summary of Contents for XTT 5000
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Page 55: ...Throughput Testing L2 BERT Diagram Home Layer 2 BERT Where do you want to go next Home 49...
Page 58: ...XTT 5000 User s Manual Throughput Stream Results Throughput Test Setup Working Desktop Home 52...
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Page 67: ...Throughput Testing Throughput Aggregate Results Throughput Stream Results Home 61...
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Page 147: ...Save Features 141 RFC2544 NE Applications IP Test Setup Monitor Setup Loopback Test Setup Home...
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