Dell PowerSwitch S4820T Configuration Guide for the S4820T System 9.100.0 - Page 246
Configuring Bandwidth Allocation for DCBx CIN, Configuring ETS in a DCB Map
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Configuring Bandwidth Allocation for DCBx CIN After you apply an ETS output policy to an interface, if the DCBx version used in your data center network is CIN, you may need to configure a QoS output policy to overwrite the default CIN bandwidth allocation. This default setting divides the bandwidth allocated to each port queue equally between the dot1p priority traffic assigned to the queue. To create a QoS output policy that allocates different amounts of bandwidth to the different traffic types/ dot1p priorities assigned to a queue and apply the output policy to the interface, follow these steps. 1 Create a QoS output policy. CONFIGURATION mode Dell(conf)#qos-policy-output test12 The maximum 32 alphanumeric characters. 2 Configure the percentage of bandwidth to allocate to the dot1p priority/queue traffic in the associated L2 class map. QoS OUTPUT POLICY mode Dell(conf-qos-policy-out)#bandwidth-percentage 100 The default is none. 3 Repeat Step 2 to configure bandwidth percentages for other priority queues on the port. QoS OUTPUT POLICY mode Dell(conf-qos-policy-out)#bandwidth-percentage 100 4 Exit QoS Output Policy Configuration mode. QoS OUTPUT POLICY mode Dell(conf-if-te-0/1)#exit 5 Enter INTERFACE Configuration mode. CONFIGURATION mode interface type slot/port 6 Apply the QoS output policy with the bandwidth percentage for specified priority queues to an egress interface. INTERFACE mode Dell(conf-if-te-0/1)#service-policy output test12 Configuring ETS in a DCB Map A switch supports the use of a DCB map in which you configure enhanced transmission selection (ETS) setting. To configure ETS parameters, you must apply a DCB map on an interface. ETS Configuration Notes ETS provides a way to optimize bandwidth allocation to outbound 802.1p classes of converged Ethernet traffic. Different traffic types have different service needs. Using ETS, you can create groups within an 802.1p priority class to configure different treatment for traffics with different bandwidth, latency, and best-effort needs. When you configure ETS in a DCB map: • The DCB map associates a priority group with a PFC operational mode (on or off) and an ETS scheduling and bandwidth allocation. You can apply a DCB map on multiple egress ports. 246 Data Center Bridging (DCB)
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