VeEX VePAL TX300M, Руководство пользователя

Страница: 398 / 421

Go back to top Go back to TOC
Traffic Distribution Details - Frames
Received Frames (RX)
Total
: Total number of frames received
Test
: Number of test frames received
Non-Test:
Number of non-test frames received
Transmitted Frames (TX)
Total: Number of test frames transmitted
Flow Control:
Flow control is the FC-2 control process to pace the flow of frames between Nx_Ports, an Nx_Port and the
Fabric and within the Fabric to prevent overrun at the receiver.
Flow control is managed between Nx_Ports (end-to-end) and between FC_Ports (buffer-to-buffer). Flow control
management has variations dependent upon the service class, however Class 3 uses only buffer-to-buffer flow control.
RR-RDY:
For Class 3 frames transmitted and received, a R_RDY is issued when a receive buffer is available.
BB Credit Count:
Memory or “buffers” to temporarily store frames as they arrive and until they are assembled in sequence, and
delivered to the upper layer protocol.
The number of buffers (the number of frames a port can store) is called “Buffer Credit”. Also defined as the number of
unacknowledged or outstanding frames awaiting R_RDY responses from the directly attached FC_Port.
To track the number of frames transmitted for which R_RDY responses are outstanding, the transmitting FC_Port uses
the BB_Credit_CNT.
BERT - Frame Distribution
Go back to top Go back to TOC
TX300S_e-manual_D07-00-064P_RevA00