Guidelines For Configuring Ecn For Classifying And Color-Marking Packets - Dell Z9000 Configuration Manual

QOS-POLICY-OUT mode
Dell(conf-qos-policy-out)#wred—profile weight number
2. Configure a WRED profile, and specify the threshold and maximum drop rate.
WRED mode
Dell(conf-wred) #wred—profile thresh-1
Dell(conf-wred) #threshold min 100 max 200 max-drop-rate 40
3. Configure another WRED profile, and specify the threshold and maximum drop rate.
WRED mode
Dell(conf-wred) #wred—profile thresh-2
Dell(conf-wred) #threshold min 300 max 400 max-drop-rate 80
4. Associate the service class with the WRED profile, and assign the WRED profile to specific queues on
backplane ports.
CONFIGURATION mode
Dell(conf) #service-class wred green backplane queue5 thresh-1 queue7
thresh-2
Dell(conf) #service-class wred yellow backplane queue1 thresh-2 queue3
thresh-1
Dell(conf) #service-class wred weight backplane queue0 11 queue6 4 queue7 9
5. Create a global buffer pool that is a shared buffer pool accessed by multiple queues when the
minimum guaranteed buffers for the queue are consumed. The Z9000 platform supports only pool
0.
mode
Dell(conf) #service-pool wred green pool0 thresh-1 pool1 thresh-2
Dell(conf) #service-pool wred yellow pool0 thresh-3 pool1 thresh-4
Dell(conf) #service-pool wred weight pool0 11 pool1 4
6. Attach the ECN marking to specific queues on backplane ports with a service class.
CONFIGURATION mode
Dell(conf) #service-class wred ecn backplane 0,3-5,7
Guidelines for Configuring ECN for Classifying and Color-
Marking Packets
Keep the following points in mind while configuring the marking and mapping of incoming packets using
ECN fields in IPv4 headers:
• Currently Dell Networking OS supports matching only the following TCP flags:
– ACK
– FIN
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Quality of Service (QoS)