128 | Data Center Bridging (DCB)
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Applying an ETS Output Policy for a Priority Group to an
Interface
To apply ETS on egress port traffic, you must associate a priority group with an ETS output policy which
has scheduling and bandwidth configuration in a DCB output policy, and then apply the output policy to an
interface. To apply ETS on egress port traffic, follow these steps:
Step Task Command Command Mode
1 Create a DCB output policy to associate an
ETS configuration with priority traffic.
Maximum: 32 alphanumeric characters.
dcb-output policy-name
CONFIGURATION
2 Enable the ETS configuration so that
scheduling and bandwidth allocation
configured in an ETS output policy or received
in a DCBX TLV from a peer can take effect on
an interface. Default: ETS mode is on.
ets mode on
DCB OUTPUT POLICY
3 Associate the 802.1p priority traffic in a
priority group with the ETS configuration in a
QoS output policy.
priority-group group-name
qos-policy ets-policy-name
DCB OUTPUT POLICY
4 (Optional) Enter a text description of the output
policy. Maximum: 32 characters.
description text
DCB OUTPUT POLICY
5 Repeat Steps 1 to 4 to configure all remaining ETS priority groups with an ETS output policy.
6 Exit DCB Output Policy Configuration mode.
exit
DCB OUTPUT POLICY
7 Enter INTERFACE Configuration mode.
interface type slot/port
CONFIGURATION
8 Apply the output policy with the ETS
configuration to an egress interface.
dcb-policy output
policy-name
INTERFACE
FTOS Behavior:
Create a DCB output policy to associate a priority group with an ETS output policy with scheduling and
bandwidth configuration. You can apply a DCB output policy on multiple egress ports.
The ETS configuration associated with 802.1p priority traffic in a DCB output policy is used in DCBX
negotiation with ETS peers.
When you apply an ETS output policy to an interface, ETS-configured scheduling and bandwidth
allocation take precedence over any configured settings in the QoS output policies.
To remove an ETS output policy from an interface, use the no dcb-policy output policy-name
command. ETS is enabled by default with the default ETS configuration applied (all dot1p priorities in
the same group with equal bandwidth allocation).
If you disable ETS in an output policy applied to an interface (the no ets mode on command), any
previously configured QoS settings at the interface or global level take effect. If QoS settings are
configured at the interface or global level and in an output policy map (the service-policy output
command), the QoS configuration in the output policy take precedence.
When you apply a DCB output policy with ETS bandwidth allocation to an egress interface which uses
default ETS settings, the configured bandwidth allocation may not be applied to dot1p priority traffic in
the specified priority group.
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