Xtramus NuWIN V1.1 - Manual (Page 32)

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2.1.4 Port Hardware
The ports on the NuStreams card modules which plug into the NuStreams Chassis
provide high-speed sophisticated transmit, capture and statistics operations.
2.1.4.1 Matrix
1 to 1024 packets can be sent as a batch repeatedly with Ethernet packet, CRC Bit,
CRC Error, Alignment Error, Packet Length and Preamble Length configuration.
2.1.4.2 Packets
Packets may contain a counted number of frames or a continuous set of frames when
Continuous mode is used. Frames are separated by programmable Inter-Packet Gaps
(IPG). The size of the Inter-Packet Gaps depends on the particular NuStreams module
in use. The placement of Inter-Packet Gaps is shown below:
Counted of Infinite (for Continuous packets)
2.1.4.3 Frame Data
The contents of every packet are programmable in terms of structure and data content.
The programmable fields are:
Preamble size—depends on the particular NuStreams card module used.
Frame size—depends on the particular NuStreams card module used.
Destination and Source MAC Addresses—allows the MAC addresses to be set to
a constant or vary randomly or increment/decrement under a mask.
Data generators—five different data generators are available. The generators are
listed below; the values from later generators overwrite data from earlier ones.
• Protocol related data—formatted to correspond to particular data link, transport
and protocol conventions. Data link layer controls allow for Ethernet II and
802.3 SNAP formatting, with support for VLANs. Protocol specific data for