Downstream Traffic Profile Configuration Parameters

Parameter
Description
Traffic Priority
Priority for the service flow. Higher-priority service flows are given preference over lower-priority service flows.
Downstream Resequencing
A 1-byte unsigned integer specifying the use of sequencing numbers in downstream service flows to allow the cable modem to re-order out of sequence packets. The cable modem will hold higher numbered packets while waiting for lower numbered packets to arrive.
Note: Applications that can tolerate lost packets or applications that cannot tolerate packet latency of up to 18 milliseconds can disable the use of sequence numbers by setting the Downstream Resequencing value to 1.
Max Sustained Traffic Rate (bps)
The maximum sustained rate, in bits per second, at which traffic can operate over the service flow.
Max Traffic Burst
The maximum burst size for the service flow.
Min Reserved Traffic Rate (bps)
The guaranteed minimum rate, in bits per second, that is reserved for the service flow.
Assumed Min Packet Size (bytes)
The assumed minimum packet size, in bytes, for which the minimum reserved traffic rate is provided.
Max Downstream Latency
The maximum latency for downstream service flows.
Downstream Peak Traffic Rate
A four-byte unsigned integer field, specifying the rate parameter P of a token-bucket based peak rate limiter for packets of a downstream service flow. This lets you define a Max Traffic Burst value for the Max Sustained Traffic Rate much larger than a maximum packet size, but still limit the burst of packets consecutively transmitted for a service flow.
Required Attribute Mask
A 32-bit mask that specifies whether certain attributes are required in a service flow.
Forbidden Attribute Mask
A 32-bit mask that specifies whether certain attributes are forbidden in a service flow.
Attribute Aggregation Rule Mask
A 32-bit mask that controls whether groups of attributes are either required or forbidden in a service flow.
Minimum Buffer
The lower limit for the size, in bits, of the buffer to be provided for a service flow. The range is 0 – 4,294,967,295 bits (4 Gb–1). The default is a value of 0, which indicates that there is no lower limit.
Target Buffer
The value for the size, in bits, of the buffer to be provided for a service flow. The range is 0 – 4,294,967,295 bits (4 Gb–1). If the parameter is omitted or set to a value of 0, then the device selects any buffer size within the range of the minimum and maximum buffers, using a vendor-specific algorithm.
Maximum Buffer
The upper limit for the size of the buffer to be provided for a service flow. The range is 0 – 4,294,967,295 bits (4 Gb–1). The default is no limit.