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4 duplex mode, 5 flow control, Duplex mode – Siemens S223 User Manual

Page 76: Flow control

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UMN:CLI User Manual

SURPASS hiD 6615 S223/S323 R1.5

76 A50010-Y3-C150-2-7619

SWITCH(bridge)# show port 1

-------------------------------------------------------------------

NO TYPE PVID STATUS MODE FLOWCTRL INSTALLED

(ADMIN/OPER)

-------------------------------------------------------------------

1: Ethernet 1 Up/Up Force/Half/100 Off Y

SWITCH(bridge)# port speed 1 10

SWITCH(bridge)# show port 1

-------------------------------------------------------------------

NO TYPE PVID STATUS MODE FLOWCTRL INSTALLED

(ADMIN/OPER)

-------------------------------------------------------------------

1: Ethernet 1 Up/Up Force/Half/10 Off Y

SWITCH(bridge)#

5.2.4 Duplex

Mode

Only unidirectional communication is practicable on half duplex mode, and bidirectional
communication is practicable on full duplex mode. By transmitting packet for two ways,
Ethernet bandwidth is enlarged two times- 10Mbps to 20Mbps, 100Mbps to 200Mbps.

To set duplex mode, use the following command.

Command Mode

Description

port duplex

PORTS {full | half} Bridge

Sets full or half duplex mode of specified port, enter the
port number.

The following is an example of configuring duplex mode of port 1 as half mode and show-
ing it.

SWITCH(bridge)# show port 1

-------------------------------------------------------------------

NO TYPE PVID STATUS MODE FLOWCTRL INSTALLED

(ADMIN/OPER)

-------------------------------------------------------------------

1: Ethernet 1 Up/Up Force/Full/100 Off Y

SWITCH(bridge)# port duplex 1 half

SWITCH(bridge)# show port 1

-------------------------------------------------------------------

NO TYPE PVID STATUS MODE FLOWCTRL INSTALLED

(ADMIN/OPER)

-------------------------------------------------------------------

1: Ethernet 1 Up/Down Force/Half/100 Off Y

SWITCH(bridge)#

5.2.5 Flow

Control

Ethernet ports on the switches use flow control to restrain the transmission of packets to
the port for a period time. Typically, if the receive buffer becomes full, the port transmits a
pause packet that tells remote ports to delay sending more packets for a specified period
time. In addition, the Ethernet ports can receive and act upon pause packets from other
devices.

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