---
name: "harp"
section: "4"
platform: "linux"
package: "freebsd-manpages"
version: "6.0-5"
release: "Debian 4.0 (Etch)"
platforms: ["linux"]
url: "https://new.carta.tech/harp"
---

# harp(4)

pseudo physical interface driver for HARP

## NAME

**harp** – pseudo physical interface driver for HARP

## SYNOPSIS

**device** **atm** **options** **NATM** **options** **ATM\_CORE** **device** **harp**

## DESCRIPTION

The **harp** driver, when loaded, attaches to all [netgraph(4)](/netgraph/4.md) ATM interfaces in the system, and for each of these interfaces presents a physical interface to the HARP stack. The name of the **harp** physical interface is the same as the name of the Netgraph interface (they are in different namespaces).

## SEE ALSO

[fatm(4)](/fatm/4.md), [hatm(4)](/hatm/4.md), [ng\_atm(4)](/ng_atm/4.md), [patm(4)](/patm/4.md), atm(8)

## CAVEATS

When [fatm(4)](/fatm/4.md) is used, it must be started before **harp** is loaded, to get the correct configuration for the HARP physical interface.

## AUTHORS

Harti Brandt ⟨harti@FreeBSD.org⟩