Dell PowerSwitch S4128F-ON EMC SmartFabric OS10 User Guide Release 10.5.0 - Page 1169

2. Enable the Data Center Bridging Exchange protocol (DCBX). See Data center bridging exchange (DCBX) for more information. OS10 (config)# dcbx enable 3. Create a VLAN. In this example, VLAN 55 switches the RoCE traffic. You can configure any value from 1 to 4093. OS10 (config)# interface vlan 55 OS10 (conf-if-vl-55)# no shutdown 4. Apply the dot1p trust globally or at the interface level. In this example, the dot1p trust is applied globally. NOTE: • If PFC configuration is not enabled on all the ports in the switch, do not apply dot1p trust globally. Apply the dot1p trust on the specific interfaces. • For RoCEv1, use the trust-map dot1p default command or the user-defined trust-map dot1p configuration. • For RoCEv2, use the trust-map dscp default command or the user-defined trust-map dscp configuration. OS10 (config)# system qos OS10 (config-sys-qos)# trust-map dot1p default 5. Create a network-qos type class-map and policy-map for priority flow control (PFC). This configuration fine tunes the buffer settings for the particular priority. OS10 (config)# class-map type network-qos pfcdot1p3 OS10 (config-cmap-nqos)# match qos-group 3 OS10 (config)# policy-map type network-qos policy_pfcdot1p3 OS10(config-pmap-network-qos)# class pfcdot1p3 OS10(config-pmap-c-nqos)# pause OS10(config-pmap-c-nqos)# pfc-cos 3 NOTE: When you use the pause command without any parameters, the system uses the default buffer settings. To modify the buffer settings, use the pause command and specify the buffer size, pause threshold, and resume threshold. See Priority flow control and the pause command for more information. 6. Create queuing-type class-maps and policy-map for enhanced transmission selection (ETS), bandwidth, and ECN configurations. See Enhanced transmission selection and Bandwidth allocation for more information. Bandwidth configuration for RoCEv1: OS10 (config)# class-map type queuing Q0 OS10 (config-cmap-queuing)# match queue 0 OS10 (config)# class-map type queuing Q3 OS10 (config-cmap-queuing)# match queue 3 OS10 (config)# policy-map type queuing policy_2Q OS10 (config-pmap-queuing)# class Q0 OS10 (config-pmap-c-que)# bandwidth percent 30 OS10 (config-pmap-c-que)# exit OS10 (config-pmap-queuing)# class Q3 OS10 (config-pmap-c-que)# bandwidth percent 70 Bandwidth and ECN configuration for RoCEv2 with ECN queue association: OS10 (config)# class-map type queuing Q0 OS10 (config-cmap-queuing)# match queue 0 OS10 (config)# class-map type queuing Q3 OS10 (config-cmap-queuing)# match queue 3 OS10(config)# wred wred_ecn OS10(config-wred)# random-detect ecn OS10(config-wred)# random-detect color green minimum-threshold 1000 maximum-threshold 2000 drop-probability 100 OS10(config-wred)# random-detect color yellow minimum-threshold 500 maximum-threshold 1000 drop-probability 100 OS10(config-wred)# random-detect color red minimum-threshold 100 maximum-threshold 500 Quality of service 1169