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Data Center Bridging
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Usage
Information
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. When you
apply an ETS output policy on an interface, ETS-configured scheduling and bandwidth allocation take
precedence over any configured settings in QoS output policies.
The ETS configuration associated with 802.1 priority traffic in a DCB output policy is used in DCBX
negotiation with ETS peers.
Related
Commands
dcb-policy input
Apply the input policy with the PFC configuration to an ingress interface.
Syntax
dcb-policy input
policy-name
To delete the input policy, use the
no dcb-policy input
command.
Parameters
Defaults
none
Command Modes
INTERFACE
Command
History
Usage
Information
If you apply an input policy with PFC disabled (
no
pfc mode on
):
•
Link-level flow control can be enabled on the interface. To delete the input policy, you must first
disable link-level flow control. PFC is then automatically enabled on the interface because an
interface is by default PFC-enabled.
•
PFC still allows you to configure lossless queues on a port to ensure no-drop handling of lossless
traffic.
When you apply an input policy to an interface, an error message is displayed if:
•
The PFC dot1p priorities result in more than two lossless port queues globally on the switch.
•
Link-level flow control is already enabled. PFC and link-level flow control cannot be enabled at
the same time on an interface.
In a switch stack, you must configure all stacked ports with the same PFC configuration.
A DCB input policy for PFC applied to an interface may become invalid if the dot1p-queue mapping is
reconfigured. This situation occurs when the new dot1p-queue assignment exceeds the maximum
number (2) of lossless queues supported globally on the switch. In this case, all PFC configurations
received from PFC-enabled peers are removed and re-synchronized with the peer devices.
Traffic may be interrupted when you reconfigure PFC no-drop priorities in an input policy or re-apply
the policy to an interface.
Related
Commands
dcb-policy output
Apply the output policy.
policy name
Enter the input policy name with the PFC configuration to an ingress interface.
Version 8.3.16.1
Introduced on MXL 10/40GbE Switch IO Module
dcb-input
Create a DCB input policy.
Содержание Force10 MXL Blade
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