Netgear XSM4324CS Software Administration Manual Software Version 12.x - Page 288
To con WRED Explicit Congestion Notification configuration, Client
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M4300 Series and M4300-96X Fully Managed Switches Weighted random early discard (WRED, also referred to as weighted random early detection) considers packets for early discard only when the number of packets that are queued for transmission on a port exceeds the relevant minimum WRED threshold. The green, yellow, and red thresholds operate on TCP packets. A fourth threshold operates on non-TCP packets. If ECN is enabled and congestion occurs, ECN-capable TCP packets that are queued for transmission and that are selected to be discarded by WRED are instead CE-marked and transmitted. Packets that exceed the WRED upper threshold are also transmitted. If severe congestion occurs on the switch (that is, no buffers are available), the packets are discarded. On managed switches, ECN is implemented as part of the WRED configuration process. You can configure any CoS queue to operate in ECN marking mode and you can configure different discard thresholds for each color. Client 1.1.1.1 Network 1/0/25 Switch 1/0/45 Server Figure 31. WRED Explicit Congestion Notification configuration To configure WRED Explicit Congestion Notification configuration: 1. Create class 1 and class 2. (Netgear Switch) (Config)#class-map (Netgear Switch) (Config)#class-map match-all class1 (Netgear Switch) (Config-classmap)#match srcip 1.1.1.1 255.255.255.255 (Netgear Switch) (Config-classmap)#exit (Netgear Switch) (Config)#class-map match-all class2 (Netgear Switch) (Config-classmap)#match ip dscp 46 (Netgear Switch) (Config-classmap)#exit 2. Create a policy and configure the conform color for class 2. (Netgear Switch) (Config)#policy-map p1 in (Netgear Switch) (Config-policy-map)#class class1 (Netgear Switch) (Config-policy-classmap)#police-single-rate 1000000 128 128 conform-action transmit exceed-action transmit violate-action transmit (Netgear Switch) (Config-policy-classmap)#conform-color class2 (Netgear Switch) (Config-policy-classmap)#exit DiffServ 288 Software Administration Manual
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