Link Packet (Flow Control Packet) Check
Refer to Figure 25-21 on page 661. A port's Link Layer performs the checks shown in the figure before passing the packet to the Link Layer's Flow Control logic for placement in the designated VL receive buffer.
Figure 25-21. Link Layer's Link Packet Check
During initialization, the number of active VLs may not have been configured yet, so receiving credits for a unsupported VL is only an error if the Link Layer is in the LinkArm or LinkAct state. See “Link State Machine” on page 602.
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