Users Guide

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.
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 Exit QoS Output Policy Conguration mode.
QoS OUTPUT POLICY mode
Dell(conf-if-te-0/1)#exit
5 Enter INTERFACE Conguration mode.
CONFIGURATION mode
interface type slot/port
6 Apply the QoS output policy with the bandwidth percentage for specied priority queues to an egress interface.
INTERFACE mode
Dell(conf-if-te-0/1)#service-policy output test12
Conguring ETS in a DCB Map
A switch supports the use of a DCB map in which you congure enhanced transmission selection (ETS) setting. To congure ETS
parameters, you must apply a DCB map on an interface.
ETS Conguration Notes
ETS provides a way to optimize bandwidth allocation to outbound 802.1p classes of converged Ethernet trac. Dierent trac types have
dierent service needs. Using ETS, you can create groups within an 802.1p priority class to congure dierent treatment for tracs with
dierent bandwidth, latency, and best-eort needs.
When you congure ETS in a DCB map:
• The DCB map associates a priority group with a PFC operational mode (on or o) and an ETS scheduling and bandwidth allocation. You
can apply a DCB map on multiple egress ports.
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Data Center Bridging (DCB)