Link Control Services

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Link Control Frames

Mnemonic Class of Service Description
ACK_0 1,2 Acknowledge all Data frames in Sequence
ACK_1 1,2 Acknowledge one Data frames in Sequence
ACK_N 1,2 Acknowledge N Data frames in Sequence
F_BSY(DF) 1,2 Fabric Busy response to a Data frame
F_BSY(LC) 1,2 Fabric Busy response to a Link Control frame
F_RJT 1,2 Fabric Reject response to a Data frame
LCR 2 Link Credit Reset for Class 2 EE Credit recovery
P_BSY 1,2 N_Port Busy response to a Data frame
P_RJT 1,2 N_Port Reject response to a Data frame

There are no Link Control Frames for Class 3, because Class 3 simply discards a packet if it cannot deal with it (receiver too busy or some other condition).


Basic Link Services

ABTS, BA_ACC, BA_RJT, NOP, PRMT, RMC

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