Figure 70: File Transfer Scenario: Speed Buffers Run Low - Broadcom BCM5722 Programmer's Manual

BCM5722
S B R
WITCH UFFERS
The switch must wait/inhibit transmission to the Client (see
packets to the Switch. The Switch will buffer some packets, but will eventually hit 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 will dictate how the switch slows traffic. There are two options:
• Jamming (half-duplex)
• Pause frames (full-duplex)
Port buffers &
memory almost
exhausted
Ingres
Page 515 Flow Control Scenario
L
UN OW
Server
Port
MAC Sublayer

Figure 70: File Transfer Scenario: Speed Buffers Run Low

Bro adco m C orp or atio n
Figure 70). During the pause interval, the Server is still sending
Client
Egres
Port
Programmer's Guide
10/15/07
Switch
Document 5722-PG101-R