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Spirent TestCenter: Is it possible to send bursty traffic but continuously on a DX2 card?

Customer wanted to run a stream block with burst of traffic continuously, for example every 1ms, wanted to send in burst of 1000 packets.
DX2 (and 100G FX2/MX2) cards.
Rates on DX2 (and 100G FX2/MX2) cards are just not as precise as on other FX/MX modules. This definitely falls under a limitation.

MX2 card in this case is an enhanced DX-architecture card on the generator side and the behavior difference is not surprising.
Root Cause
Hardware limitation.

Product : MX2,DX2,FX2