Use the do show red profiles command to view the RED profile's configuration.
SLX(conf-if-eth-0/1)# do show qos red profiles 1 Red Profile 1 Minimum Threshold: 10 Maximum Threshold: 50 Drop Probability: 100 ECN: Off Activated on the following interfaces: Eth 0/1 traffic-class: 0 drop-precedence: 03
Similarly, use the show qos red statistics command to view the per port RED dropped packets.
SLX# show qos red statistics interface eth 0/1 Statistics for interface: Eth 0/1 Port Statistics: Packets Dropped: 147, Queue Full Drops: 222, ECN Marked: 234