XTT 5000 User's Manual
To enable filtering, select the Rx Filter tab on the Stream Number x window from the
. The filter specifies the frame elements that will be captured.
Turn an element On to filter for that element.
•
For example, if you sent Source MAC on, only packets which match the
Stream Table Source Mac settings will be captured.
•
Set to Off, packets would be captured regardless of their Source MAC
address.
Testing Tips
Most testing is done with a loopback unit at the other end. In a Layer 2/3 loopback,
the Source and Destination MAC/IP will be swapped so the traffic can be returned to
the test set. Layer 1 does not touch the traffic it simply copies the input to the
output. Hence, configuring the RX Filter Source/Destination requires careful
consideration. The behavior of the unit with multiple streams can also be
complicated.
If you are sending two streams to the same Destination MAC, with differing Source
MAC addresses, the stream data may be captured in unexpected ways.
Example 1
Stream 1
Source MAC: 00::02
Destination MAC: 00::01
Stream 2
Source MAC: 00::03
Destination MAC: 00::01
Without the Rx Filter in use, both streams
will be detected normally.
Example 2
Stream 1
Destination MAC Rx Filter
All the traffic from both Stream 1 and
Stream 2 will appear in the Stream 1
results; no traffic appears for Stream 2.
Be aware of this when troubleshooting
traffic.
Try rule 1 then rule 2 etc for each
frame.
In addition, the Destination is best ignored. This is because the Source MAC
addresses are different. When they arrive at the loopback device, they will be
swapped, making the SRC the DUST, and vice versa. Now the return frames have
different Destinations with the same Source.
Where do you want to go next?
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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...
Page 61: ...Throughput Testing Home 55...
Page 67: ...Throughput Testing Throughput Aggregate Results Throughput Stream Results Home 61...
Page 81: ...Throughput Testing Working Desktop Home 75...
Page 83: ...Throughput Testing Home 77...
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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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