Flowcontrol - Supermicro SSE-G2252 User Manual

SSE-G2252/SSE-G2252P Switches User's Manual

flowcontrol

This command enables flow control. Use the no form to disable flow control.
Syntax
[no] flowcontrol
Default Setting
Disabled
Command Mode
Interface Configuration (Ethernet, Port Channel)
Command Usage
• 1000BASE-T does not support forced mode. Auto-negotiation should always be
used to establish a connection over any 1000BASE-T port or trunk.
• Flow control can eliminate frame loss by "blocking" traffic from end stations or
segments connected directly to the switch when its buffers fill. When enabled, back
pressure is used for half-duplex operation and IEEE 802.3-2002 (formally IEEE
802.3x) for full-duplex operation.
• To force flow control on or off (with the flowcontrol or no flowcontrol command),
use the no negotiation command to disable auto-negotiation on the selected
interface.
• When using the
settings will be determined by the
under auto-negotiation, "flowcontrol" must be included in the capabilities list for any
port
• Avoid using flow control on a port connected to a hub unless it is actually required to
solve a problem. Otherwise back pressure jamming signals may degrade overall
performance for the segment attached to the hub.
Example
The following example enables flow control on port 5.
SSE-G2252(config)#interface ethernet 1/5
SSE-G2252(config-if)#flowcontrol
SSE-G2252(config-if)#no negotiation
SSE-G2252(config-if)#
Related Commands
"negotiation" on page 27-9
"capabilities" on page 27-4
negotiation command to enable auto-negotiation, the optimal
capabilities
(flowcontrol, symmetric)
command. To enable flow control
27-6