The scheduling mode for outgoing traffic from the port, specifying how multiple logical streams are merged onto one physical port. There are four primary modes:
Normal Interleaved: The streams are treated independently, and are merged into a combined traffic pattern for the port, which honors each stream’s ideal packet placements as well as possible. This is the default mode.
Strict Uniform: This is a slight variation of normal interleaved scheduling, which emphasizes strict uniformity of the inter-packet-gaps as more important than hitting the stream rates absolutely precisely.
Sequential: Each stream in turn contribute one or more packets, before continuing to the next stream, in a cyclical pattern. The count of packets for each stream is obtained from the PS_PACKETLIMIT parameter value for the stream. The individual rates for each stream are ignored, and instead the overall rate is determined at the port-level using the P_RATExxx parameters. This in turn determines the rates for each stream, taking into account their packet lengths and counts. The maximum number of packets in a cycle (i.e. the sum of PS_PACKETLIMIT for all enabled streams) is 500. If the packet number is larger than 500, will be returned when attempting to start the traffic (P_TRAFFIC ON).
Burst*: When this mode is selected, frames from the streams on a port are sent as bursts as depicted below:
The Burst Period is defined in the P_TXBURSTPERIOD parameter. For the individual streams the number of packets in a burst is defined by the PS_BURST parameter, while the Inter Packet Gap and the Inter Burst Gap are defined by the PS_BURSTGAP parameter.