314 | Data Center Bridging (DCB)
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• When allocating bandwidth or configuring a queue scheduler for dot1p priorities in a priority group on
a DCBx CIN interface, take into account the CIN bandwidth allocation (Configuring Bandwidth
Allocation for DCBx CIN) and dot1p-queue mapping (Table 13-1).
• Although an ETS output policy does not support WRED, ECN, rate shaping, and rate limiting because
these parameters are not negotiated by DCBx with peer devices, you can apply a QoS output policy
with WRED and/or rate shaping on a DCBx CIN-enabled interface (refer to Configure Port-based Rate
Shaping on page 763 and Weighted Random Early Detection). In this case, the WRED or rate shaping
configuration in the QoS output policy should take into account the bandwidth allocation or queue
scheduler configured in the ETS output policy.
• You can only use a QoS ETS output policy in association with a priority group in a DCB output policy
and cannot be applied to an interface as a normal QoS output policy (refer to Applying an ETS Output
Policy for a Priority Group to an Interface and Create an output QoS policy in Chapter 38, Quality of
Service (QoS)).
Creating a QoS ETS Output Policy
A QoS output policy that you create to optimize bandwidth on an output interface for specified priority
traffic consists of the ETS settings used in DCBx negotiations with peer devices:
• Bandwidth percentage
• Queue scheduling
To create a QoS output policy with ETS settings, follow these steps:
Note: The IEEE 802.1Qaz, CEE, and CIN versions of ETS are supported.
Step Task Command Command Mode
1 Create a QoS output policy to configure the ETS
bandwidth allocation and scheduling for priority
traffic.
Maximum: 32 characters.
qos-policy-output
policy-name ets
CONFIGURATION
2 (Optional) Configure the method used to
schedule priority traffic in port queues.
• strict - Strict priority traffic is serviced before
any other queued traffic (refer to
Strict-priority Queueing in Chapter 38,
Quality of Service (QoS)).
Note: If you configure a scheduling method, you
cannot configure bandwidth allocation in Step 3.
scheduler value
POLICY-MAP-OUT-ETS
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