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If you configure only the priority group in an ETS output policy or only the dot1p priority for strict-priority scheduling, the
flow is handled with group strict priority.
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.
For more information, refer to Allocating Bandwidth to 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. Create a priority group for strict-priority scheduling.
QoS OUTPUT POLICY mode
Dell(conf-qos-policy-out)#scheduler strict
NOTE:
You can not use scheduler strict when bandwidth percentage is configured. It displays an error message.
Dell(conf-qos-policy-out)#bandwidth-percentage 100
Dell(conf-qos-policy-out)#scheduler strict
% Error: Strict priority scheduler mode is not allowed when bandwidth-percentage
is configured on qos-policy-output profile.
Dell(conf-qos-policy-out)#scheduler strict ?
5. Exit QoS Output Policy Configuration mode.
QoS OUTPUT POLICY mode
Dell(conf-if-te-0/1)#exit
6. Enter INTERFACE Configuration mode.
CONFIGURATION mode
Dell(conf-qos-policy-out)#int te 0/1
7. 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
Configure a DCBx Operation
DCB devices use data center bridging exchange protocol (DCBx) to exchange configuration information with directly connected
peers using the link layer discovery protocol (LLDP) protocol.
DCBx can detect the misconfiguration of a peer DCB device, and optionally, configure peer DCB devices with DCB feature
settings to ensure consistent operation in a data center network.
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