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# qos-mode-port

#### Syntax

[ no ] qos-mode-port [ low-cdv | low-latency ]

#### Release Information

Command introduced before JUNOSe Release 7.1.0.

#### Description

Configures an ATM port for per-port queuing. The no version restores the default integrated mode, removing per-port queuing from the ATM port; in this state, shaping done by the SAR is controlled by ATM.

#### Options

- low-cdv—HRR scheduler and SAR scheduler operate in concert. The SAR runs with more buffering than in low-latency mode, shaping rates are driven by QoS profiles, VC backpressure is disabled, and lenient port backpressure is enabled.
- low-latency—Shaping done by the SAR is controlled by QoS. The HRR scheduler controls the traffic rate. The SAR runs with minimal buffering, VC backpressure is disabled, and aggressive port backpressure is enabled. This is the behavior enforced if you do not specify an option.

#### Mode

Interface Configuration

#### Related Topics

- Integrating the HRR Scheduler and SAR Scheduler
- Configuring Default Integrated Mode for ATM Interface
- Configuring Low-Latency Mode for Per-Port Queuing on ATM Interfaces
- Configuring Low-CDV Mode for Per-Port Queuing on ATM Interfaces
- Disabling Per-Port Queuing on ATM Interfaces

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