Priority Flow Control Policy

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Location in GUI: Fabric » Access Policies » Policies » Interface » Priority Flow Control

Priority Flow Control States

The PFC state is determined by two boolean variables:

auto_state	admin_state	Result State
true	(ignored)	auto
false	true	on
false	false	off

Diagram

Classes

interface_policies (apic.access_policies)

Name	Type	Constraint	Mandatory	Default Value
priority_flow_control_policies	List	`[priority_flow_control_policies]`	No

priority_flow_control_policies (apic.access_policies.interface_policies)

Name	Type	Constraint	Mandatory	Default Value
name	String	Regex: `^[a-zA-Z0-9_.:-]{1,64}$`	Yes
description	String	Regex: `^[a-zA-Z0-9\\!#$%()*,-./:;@ _{\|}~?&+]{1,128}$`	No
admin_state	Boolean	`true`, `false`	No	`true`
auto_state	Boolean	`true`, `false`	No	`true`

Examples

Example-1: This configuration creates a priority flow control policy named PFC-ON with PFC explicitly enabled. The auto_state is set to false to disable auto-negotiation, and admin_state is set to true to enable PFC.

apic:
  access_policies:
    interface_policies:
      priority_flow_control_policies:
        - name: PFC-ON
          description: Priority Flow Control Enabled
          admin_state: true
          auto_state: false

Example-2: This example defines a priority flow control policy named PFC-OFF with PFC explicitly disabled. The auto_state is set to false and admin_state is set to false to disable PFC.

apic:
  access_policies:
    interface_policies:
      priority_flow_control_policies:
        - name: PFC-OFF
          description: Priority Flow Control Disabled
          admin_state: false
          auto_state: false

Example-3: This configuration creates a priority flow control policy named PFC-AUTO with auto-negotiation enabled. When auto_state is true, the PFC state is automatically negotiated with the peer.

apic:
  access_policies:
    interface_policies:
      priority_flow_control_policies:
        - name: PFC-AUTO
          description: Priority Flow Control Auto
          auto_state: true

Example-4: This configuration creates a minimal PFC policy named PFC-MIN using all default values. By default, auto_state is true and admin_state is true.

apic:
  access_policies:
    interface_policies:
      priority_flow_control_policies:
        - name: PFC-MIN

Attaching Priority Flow Control Policy to Interface Policy Group

To apply the priority flow control policy to an interface, reference it in a leaf interface policy group:

apic:
  access_policies:
    leaf_interface_policy_groups:
      - name: ACC1
        type: access
        priority_flow_control_policy: PFC-ON