---
name: "nl-classid-lookup"
section: "8"
platform: "linux"
package: "libnl"
version: "3.12.0-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/nl-classid-lookup"
---

# nl-classid-lookup(8)

Lookup classid definitions

## NAME

nl-classid-lookup - Lookup classid definitions

## SYNOPSIS

**nl-classid-lookup** \[**-hv**\] \[**-r**\] \[**--raw**\] *name*

## DESCRIPTION

nl-classid-lookup searches the classid database for a matching entry. It is used to resolve qdisc/class names to classid values and vice versa.

## OPTIONS

- **-h** or **--help**

  Print help text to console and exit.

- **-v** or **--version**

  Print versioning information to console and exit.

- **-r** or **--reverse**

  Do a reverse lookup. Lookup a classid and print its name.

- **--raw**

  Print the raw classid in hexadecimal format, do not pretty print it.

## USAGE

Resolve the qdisc/class name "interactive":

\# nl-classid-lookup interactive

Lookup the name of classid 1:2:

\# nl-classid-lookup -r 1:2

## FILES

/etc/libnl/classid

## AUTHOR

Thomas Graf is the original author and current maintainer of libnl and libnl tools. Many people have contributed to it since.