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C122-B001-02EN
CHAPTER 5 Business LAN Management by GSWB
*3
Speed on one side is fixed to 10 Mbps and Speed on the other side is fixed to
100 Mbps.
Linkup may be successful on the side fixed to 10 Mbps but normal
communication is disabled. Match the Speed settings on both sides when the
fixed setting is used.
5.3.5
Flow control
Flow control setting
IEEE802.3x flow control is supported for full duplex communication, and
backpressure flow control is supported for half-duplex communication.
Note, however, that IEEE802.3x flow control operates differently depending on the
result of the auto-negotiation.
Table 5.20 Flow control setting
Notes on using flow control
Note that enabling the flow control may affect the transfer of other ports because the
flow control is also performed between GSWB internal chips.
In the sample configuration shown below, the transfer from IOU 0 0 to
GigabitEthernet 0/6 enables flow control and then a PAUSE frame is sent from
BCM5692 #1 to BCM5692 #0 to restrict the transfer from BCM5692 #0 to BCM5692
#1. Enabling the flow control thus affects the transfer from IOU 3 1 to IOU 4 0.
Flow control setting
Interface Speed setting
Fixed (10/100)
Auto-negotiation
Receive
ON
Enabled
Result of auto-negotiation
OFF
Disabled
Disabled
Send
ON
Enabled
Result of auto-negotiation
OFF
Disabled
Disabled
Summary of Contents for PRIMEQUEST 440
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