Flowcontrol IEEE 802.3x

Old known stuff, probably for everybody who is somehow related to networking, but anyway, putting it here too.

IEEE 802.3x – Wikipedia link

If QoS is enabled and you like to prioritize the traffic, flow control needs to be disabled,as it doesn’t care about any higher level prioritization, just when ingress traffic is coming in faster than receiver can accept it, flow control will kick in and send pause frames until the ingress-egress rate will be equalized or ingress rate is lower than egress of that interface.

A bit more info from Dell FTOS 9 documentation about flow control :

 

flowcontrol

I would use it only for storage – for example iscsi traffic, in separated network, then it won’t do any harm.. probably 🙂

But of course no way of using it on trunk links, other switch facing links and etc.

 

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s