---
name: "radvdump"
section: "8"
platform: "linux"
package: "radvd"
version: "2.21-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/radvdump"
---

# radvdump(8)

dump router advertisements

## NAME

radvdump - dump router advertisements

## SYNOPSIS

**radvdump** **\[ -vhfe \]** **\[ -d** *debuglevel* **\]** **\[ -u** *username* **\]**

## DESCRIPTION

**radvdump** prints out the contents of incoming router advertisements sent by **radvd** or some other software implementing (parts of) "Neighbor Discovery for IP Version 6 (IPv6)" (RFC 4861).

## OPTIONS

For every one character option there is also a long option, which is listed right next to the "short" option name:

- **-v**, **--version**

  Displays the version of *radvdump* and then aborts.

- **-h**, **--help**

  Displays a short usage description and then aborts.

- **-f**, **--file-format**

  Output received router advertisements in the format of the **radvd** configuration file. Since radvd 0.9, this is the default and the switch is provided for backward compatibility only.

- **-e**, **--exclude-defaults**

  Exclude default valued options from configuration file format. This option is ignored if option **-f** is not set.

- **-d** debuglevel, **--debug** debuglevel

  With this option you turn on debugging information. The debugging level is an integer in the range from 1 to 4, from quiet to very verbose. A debugging level of 0 completely turns off debugging.

  The default debugging level is 0.

- **-u** username, **--username** username

  If specified, drops root privileges and changes user ID to *username* and group ID to the primary group of *username*. This is recommended for security reasons. Defaults to "nobody", pass "" or "root" to not drop privileges by default.

## FILES

```
/usr/bin/radvdump
```

## BUGS

There certainly are some bugs. If you find them or have other suggestions please send to https://github.com/radvd-project/radvd/issues

## SEE ALSO

[**radvd**(8)](/radvd/8.md), [**radvd.conf**(5)](/radvd.conf/5.md)

## AUTHORS

```
See radvd.8 manpage for authors
```