flowcontrol
Use this command to enable or disable flow control.
Flow control enables connected Ethernet ports to control traffic rates during periods of congestion by allowing congested nodes to pause link operations at the other end. If one port experiences congestion and cannot receive any more traffic, it notifies the other port to stop sending until the condition clears. When a local device detects congestion at its end, it notifies the remote device by sending a pause frame. On receiving a pause frame, the remote device stops sending data packets, which prevents loss of data packets during the period of congestion.
Use the no parameter with this command to disable flow control.
Command Syntax
flowcontrol both
flowcontrol send on
flowcontrol send off
flowcontrol receive on
flowcontrol receive off
no flowcontrol
Parameters
both
Specify flow control mode for sending or receiving.
send
Specify flow control mode for sending.
receive
Specify the flow control mode for receiving.
off
Turn off flow control.
on
Turn on flow control.
Default
The flow control is enabled globally and auto-negotiation is on, flow control is enabled and advertised on 10/100/1000M ports. If auto-negotiation is off or if the port speed was configured manually, flow control is neither negotiated with nor advertised to the peer.
Command Mode
Interface mode
Applicability
This command was introduced before OcNOS version 1.3.
Examples
#configure terminal
(config)#interface eth1
(config-if)#flowcontrol receive off
#configure terminal
(config)#interface eth1
(config-if)#flowcontrol receive on
(config)#interface eth1
(config-if)#no flowcontrol
Last modified date: 10/19/2023