Comment by vardump

> Some datacenters enable Priority Flow Control (PFC) which is different in that it pauses only the traffic with a specific PCP ( Priority in 802.1Q vlan tag ). They assign storage traffic a specific vlan priority and treat it as lossless with flow control but the rest of the traffic is unaffected.

I don't think he had his TV in a datacenter.

From the article:

> After some clever deductive reasoning, a.k.a randomly unplugging cables from the router, I determined that my TV was sending these mystery frames (yes, my TV — I have a Sony X805D Android TV).

> The mechanism here Pause is an abomination which should never be enabled.

What? You can't be serious, I think you have no idea what that would cause in almost every ethernet network. Let me tell you: a lot of packet loss that messes with TCP streams etc.

L2 pause frames are used by practically all of the ethernet devices, and for a really good reason. Pause frames are a perfectly good way to do flow control in most networks. Not having them means a lot of lost frames and generic pain in most networks... except of course datacenters.

Sure, it's not a standard. But it's good enough for 99.9% of use cases. Just maybe not in datacenter.