Flow-Control - 3Com Switch 4500 Family Manual

Description
Use the duplex command to set the duplex mode of the current port.
Use the undo duplex command to restore the default duplex mode, that is, auto-negotiation.
By default, the port is in auto-negotiation mode.
Related commands: speed.
Examples
# Set the Ethernet 1/0/1 port to auto-negotiation mode.
<Sysname> system-view
System View: return to User View with Ctrl+Z.
[Sysname] interface Ethernet 1/0/1
[Sysname-Ethernet1/0/1] duplex auto

flow-control

Syntax
flow-control
undo flow-control
View
Ethernet port view
Parameters
None
Description
Use the flow-control command to enable flow control on the current Ethernet port.
Use the undo flow-control command to disable flow control on the port.
Suppose flow control is enabled on both the local and peer switches. When congestion occurs on the
local switch,
the local switch sends a message to notify the peer switch of stopping sending packets to itself or
reducing the sending rate temporarily,
the peer switch will stop sending packets to the local switch or reduce the sending rate temporarily when
it receives the message; and vice versa. By this way, packet loss is avoided and the network service
operates normally.
By default, flow control is disabled on a port.
Examples
# Enable flow control on the Ethernet 1/0/1 port.
<Sysname> system-view
System View: return to User View with Ctrl+Z.
[Sysname] interface ethernet 1/0/1
[Sysname-Ethernet1/0/1] flow-control
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