Deployment Guide

• The CIN version supports two types of strict-priority scheduling:
• Group strict priority: Use this to increase its bandwidth usage to the bandwidth total of the priority group and allow a single
priority ow in a priority group. A single ow in a group can use all the bandwidth allocated to the group.
• Link strict priority: Use this to increase to the maximum link bandwidth and allow a ow in any priority group.
CIN supports only the dot1p priority-queue assignment in a priority group. To congure a dot1p priority ow in a priority group to
operate with link strict priority, you congure: The dot1p priority for strict-priority scheduling (strict-priority command; Enabling
Strict-Priority Queueing).
If you congure only the priority group in an ETS output policy or only the dot1p priority for strict-priority scheduling, the ow is handled
with group strict priority.
Conguring 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
congure 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 trac assigned to the queue.
For more information, refer to Allocating Bandwidth to Queue.
To create a QoS output policy that allocates dierent amounts of bandwidth to the dierent trac 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 Congure the percentage of bandwidth to allocate to the dot1p priority/queue trac 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 congure 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 congured. 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 Conguration mode.
QoS OUTPUT POLICY mode
Dell(conf-if-te-0/1)#exit
6 Enter INTERFACE Conguration mode.
CONFIGURATION mode
Dell(conf-qos-policy-out)#int te 0/1
FC Flex IO Modules
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