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Ramp:
The selected frame is transmitted at maximum bandwidth according to the selected duty cycle and burst
period.
Burst:
The selected frame is transmitted in a staircase profile according to user selectable step time, number of steps,
and maximum bandwidth.
Single Burst:
Configure the number of frames to be transmitted in the burst along with the bandwidth. For example, if
100000 frames are transmitted at 12.5% of bandwidth, on a 1Gbps line, 100000 frames will transmit at a rate of
125Mbps and then the burst will stop.
Frame Size Type:
Fixed or Uniform min and max frame length values. Uniform traffic is traffic generated with a uniform
distribution of frame lengths.
Frame Size (bytes):
Enter the frame size when a Layer 2, 3, or 4 BERT is selected
Frame size configuration is not available for Layer 1 BERT
Frame sizes can be from 64 bytes to 1518 bytes, in addition to jumbo frames up to 10000 bytes
BW (Transmit Bandwidth):
Configure the transmit rate for the test
When traffic flow is equal to Burst, two burst bandwidths are configured with burst time
When traffic flow is equal to Ramp, starting and an ending bandwidth are configured along with the bandwidth step
size and duration
BERT Setup - Constant Traffic
Frame Size Limitations
Layer 1 framed mode - Frame size configuration is not available.
Layer 1 unframed mode - Traffic profile is constant at 100% bandwidth.
5.3.1.3 Error Injection
Error injection can be performed during testing. The error type and injection rate are configured in the Error Injection tab.
Error type:
Select from Bit, CRC, IP Checksum (Layer 3, 4 only), Pause, TCP/UDP Checksum (Layer 4 only). With Pause
selected, the unit will transmit a pause frame when
Error Injection
icon is pressed. The Pause time duration is configurable
in units of 512 bit time. At Gigabit Ethernet speed, this is equivalent to 512 ns. For example, if pause time is set to 1000, the
pause duration will be set to 1000x512 ns.
Injection Flow:
The error injection flow determines how the selected errors will be injected.
Select a single error injection or specific count.
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