Switch Buffers Run Low; Figure 58: File Transfer Scenario: Speed Buffers Run Low - Broadcom NetXtreme/NetLink BCM5718 Series Programmer's Manual

BCM5718 Programmer's Guide

Switch Buffers Run Low

The switch must wait/inhibit transmission to the Client (see
still sending packets to the switch. The switch buffers some packets, but eventually hits an internal threshold;
memory will run short. Since dropping packets is undesirable, the switch must slow incoming packets from the
server. The duplex mode of the server's connection dictates how the switch slows traffic. There are two options:
• Jamming (half-duplex)
• Pause frames (full-duplex)
Port buffers &
memory almost
exhausted
Ingres
Broadcom
®
January 29, 2016 • 5718-PG108-R

Figure 58: File Transfer Scenario: Speed Buffers Run Low

Server
Port
MAC Sublayer
Figure 58). During the pause interval, the server is
Client
Egres
Port
Flow Control Scenario
Switch
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