Congestion Management (802.1Qau) Layer 2 method to rate limit flows causing congestion. Has been progressing slowing in 802.1 but an update from Draft D0.1 to Draft D0.2 was authorized last week. Some changes to Rbridges beyond those required in 802.1 Bridges would be required to support 802.1Qau. For example, a congestion control message in response to a TRILL data frame should get back to the true origin station, not just the ingress RBridge. Latest thinking in 802.1 is that this may need to be augmented by Per Priority Pause (PPP). |