Sunrise telecom XTT 5000, Руководство пользователя

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XTT 5000 User's Manual
Stream Rx Filter Home
To enable filtering, select the Rx Filter tab on the Stream Number x window from the
Stream Table . 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.
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