dont know how popular this is https://www.juniper.net/documentation/us/en/software/junos/traffic-mgmt-qfx/topics/topic-map/cos-qfx-series-DCQCN.html -- I tried to build a better future, a few times: https://wayforward.archive.org/?site=https%3A%2F%2Fwww.icei.org Dave Täht CEO, TekLibre, LLC