qos ingress-buffer-profile

Configures an ingress buffer profile.
Syntax
qos ingress-buffer-profileuser-profile-namepriority-grouppriority-group-numberxoffshared-level
no qos ingress-buffer-profileuser-profile-namepriority-grouppriority-group-numberxoffshared-level
Command Default

An ingress buffer profile is not configured.

Parameters
user-profile-name
Specifies the name of the ingress buffer profile to be configured.
priority-grouppriority-group-number
Specifies the priority group (PG) number with the XOFF threshold level that must be configured.
xoffshared-level
Specifies the per-PG buffer threshold to trigger sending of priority flow control (PFC).
Modes

Global configuration mode

Usage Guidelines

This command is not supported on RUCKUS ICX 8200 or ICX 7650 devices.

You can attach an ingress buffer profile to a port.

You must configure the no ingress-buffer-profile command to detach a profile from any ports that are using it before you can configure the no qos ingress-buffer-profile command to delete it.

The higher the sharing level, the better the port absorbs micro-bursts before reaching the XOFF threshold limit.

If PFC is enabled on a PG, and per-port with a user-defined ingress buffer profile attached to a port, the port maximum XOFF threshold level is 50 percent of service pool 1. The port maximum is used as a cap to prevent a port from using too many buffers. Under normal conditions, the PG XOFF limit is reached first.

If a PG is not enabled to send globally, any XOFF value configured has no effect.

The default ingress buffer profiles are as follows:

  • For PFC disabled ports, the default PG XOFF limit is level7-1/2.
  • For PFC enabled ports, the default PG XOFF limit is level2-1/32.

The following six PG XOFF limits are supported:

Supported PG XOFF Limits

Level Sharing-pool buffers

level1-1/64

1/64 of buffers in the sharing pool

level2-1/32

1/32 of buffers in the sharing pool

level3-1/16

1/16 of buffers in the sharing pool

level4-1/9

1/9 of buffers in the sharing pool

level5-1/5

1/5 of buffers in the sharing pool

level6-1/3

1/3 of buffers in the sharing pool

level7-1/2

1/2 of buffers in the sharing pool

The no form of the command deletes the ingress buffer profile.

Examples

The following example creates an ingress buffer profile for PG 0 with a PG XOFF limit of 1/3 of buffers in the sharing pool. 

Device(config)# qos ingress-buffer-profile ing1 priority-group 0 xoff level6-1/3
History
Release version Command history
08.0.20 This command was introduced.
Parent topic: Commands O, P, Q, R, and Sa through Sh