On the 7210 SAS-K 2F1C2T, 7210 SAS-K 2F6C4T, and 7210 SAS-K 3SFP+ 8C, the service test testhead tool can be configured to generate a flow containing a sequence of frames of different sizes. The frame sizes and designations are defined by ITU-T Y.1564 and listed in the following table.
a |
b |
c |
d |
e |
f |
g |
h |
u |
|---|---|---|---|---|---|---|---|---|
64 |
128 |
256 |
512 |
1024 |
1280 |
1518 |
MTU |
User defined |
The test tool can be configured to generate a flow containing frames with sizes ranging from 64 bytes to 9212 bytes using the designated letters to specify the frame size to use. The frame size is configured using the fixed-size command. The configured size applies to all the frames in the test flow.
It is also possible to configure the test tool to generate frames of different sizes in a flow. The frame-mix command creates a template that specifies sizes of the frames to be generated by the testhead tool. The frame sizes are defined in ITU-T Y.1564.The frame-sequence variable specifies a string of up to 16 characters that specifies the order in which the frames are to be generated by the testhead tool for a specific template. For example, a frame-sequence configured as "aabcdduh" indicates that a packet of size-a configured in the specified frame mix template should be generated first, followed by another packet of size-a, followed by packet of size-b and so on until a packet of size-h is generated. The tool then starts again and repeats the sequence until the rate of packets generated matches the required rate.