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congestion-notification-profile

 

Syntax

Interface Congestion Notification Profile Association

Hierarchy Level

Release Information

Statement introduced in Junos OS Release 11.1 for the QFX Series.

Support for DSCP values introduced in Junos OS Release 17.4R1 for the QFX Series.

Description

Configure a congestion notification profile to enable priority-based flow control (PFC) on traffic and apply the profile to an interface.

A congestion notification profile can be configured to enable PFC on incoming traffic (input stanza) that matches the following:

  • A Differentiated Services code point (DSCP) value in the Layer 3 IP header (for traffic that is not VLAN-tagged).

  • An IEEE 802.1 code point at Layer 2 in the VLAN header (for VLAN-tagged traffic).

A congestion notification profile can be configured to enable PFC on outgoing traffic (output stanza) specified only by an IEEE 802.1 code point at Layer 2 in the VLAN header.

Note

You must configure PFC for FCoE traffic. Each interface that carries FCoE traffic should be configured for PFC on the FCoE code point (usually 011).

There is no limit to the total number of congestion notification profiles you can create. However:

  • You can attach a maximum of one congestion notification profile to an interface.

  • DSCP-based PFC and IEEE 802.1p PFC cannot be configured under the same congestion notification profile.

Note

Configuring or changing PFC on an interface blocks the entire port until the PFC change is completed. After a PFC change is completed, the port is unblocked and traffic resumes. Blocking the port stops ingress and egress traffic, and causes packet loss on all queues on the port until the port is unblocked.

Options

profile-name—Name of the congestion notification profile.

The remaining statements are explained separately. Search for a statement in CLI Explorer or click a linked statement in the Syntax section for details.

Required Privilege Level

interface—To view this statement in the configuration.

interface-control—To add this statement to the configuration.