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New Member

flow-control

When I do a sh interface on a switch or router, one of the lines reads output flow-control is XON, input flow-control is XON. Does anyone know of a reason you would want to turn this off? I actually thought that flow control is really decided/controlled by the end hosts, not the network devices. I work for a company where low latency is critical. If I turn off flow control, would that improve latency because I wouldn't be slowing traffic down?

Any incite on this would be greatly appreciated.

2 REPLIES
New Member

Re: flow-control

XON means that the switch will send TxPauses if it can't process the incoming traffic. The packets are buffered for subsequent transmission. Flow control improves latency, not diminishes it. I turn it on whenever possible.

New Member

Re: flow-control

Thanks for the feedback. It's a bit more clear now.

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