Dell PowerSwitch S5212F-ON EMC SmartFabric OS10 User Guide Release 10.5.0 - Page 1304

• Separate traffic classes for the different service needs of network applications. • PFC flow control to pause data transmission and avoid dropping packets during congestion. • ETS bandwidth allocation to guarantee a percentage of shared bandwidth to bursty traffic, while allowing each traffic class to exceed its allocated bandwidth if another traffic class is not using its share. • DCBX discovery of peers, including PFC, ETS, and other DCB settings parameter exchange, mismatch detection, and remote configuration of DCB parameters. • iSCSI application protocol TLV information in DCBX advertisements to communicate iSCSI support to peer ports. This example shows how to configure a DCB converged network in which: • DCBx is enabled globally to ensure the exchange of DCBx, PFC, ETS, and ISCSI configurations between DCBx-enabled devices. • PFC is configured to ensure lossless traffic for dot1p priority 4, 5, 6, and 7 traffic. • ETS allocates 30% bandwidth for dot1p priority 0, 1, 2, and 3 traffic and 70% bandwidth for priority 4, 5, 6, and 7 traffic. • iSCSI is configured to use dot1p priority 6 for iSCSI traffic, and advertise priority 6 in iSCSI application TLVs. 1. DCBX configuration (global) Configure DCBX globally on a switch to enable the exchange of DCBX TLV messages with PFC, ETS, and iSCSI configurations. OS10# configure terminal OS10(config)# dcbx enable 2. PFC configuration (global) PFC is enabled on traffic classes with dot1p 4, 5, 6, and 7 traffic. All the traffic classes use the default PFC pause settings for shared buffer size and pause frames in ingress queue processing in the network-qos policy map. The trust-map dot1p default honors (trusts) all dot1p ingress traffic. OS10(config)# class-map type network-qos test4 OS10(config-cmap-nqos)# match qos-group 4 OS10(config-cmap-nqos)# exit OS10(config)# class-map type network-qos test5 OS10(config-cmap-nqos)# match qos-group 5 OS10(config-cmap-nqos)# exit OS10(config)# class-map type network-qos test6 OS10(config-cmap-nqos)# match qos-group 6 OS10(config-cmap-nqos)# exit OS10(config)# class-map type network-qos test7 OS10(config-cmap-nqos)# match qos-group 7 OS10(config-cmap-nqos)# exit OS10(config)# policy-map type network-qos test OS10(config-pmap-network-qos)# class test4 OS10(config-pmap-c-nqos)# pause OS10(config-pmap-c-nqos)# pfc-cos 4 OS10(config-pmap-c-nqos)# exit OS10(config-pmap-network-qos)# class test5 OS10(config-pmap-c-nqos)# pause OS10(config-pmap-c-nqos)# pfc-cos 5 OS10(config-pmap-c-nqos)# exit OS10(config-pmap-network-qos)# class test6 OS10(config-pmap-c-nqos)# pause OS10(config-pmap-c-nqos)# pfc-cos 6 OS10(config-pmap-c-nqos)# exit OS10(config-pmap-network-qos)# class test7 OS10(config-pmap-c-nqos)# pause OS10(config-pmap-c-nqos)# pfc-cos 7 OS10(config-pmap-c-nqos)# exit OS10(config-pmap-network-qos)# exit OS10(config)# system qos OS10(config-sys-qos)# trust-map dscp default 3. PFC configuration (interface) Apply the service policies with dot1p trust and PFC configurations to an interface. OS10(config)# interface ethernet 1/1/53 OS10(conf-if-eth1/1/53)# no shutdown OS10(conf-if-eth1/1/53)# service-policy input type network-qos test OS10(conf-if-eth1/1/53)# trust-map dot1p default 1304 Converged data center services