RADVDUMP(8) RADVDUMP(8)

# [NAME](#NAME)

radvdump - dump router advertisements

# [SYNOPSIS](#SYNOPSIS)

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

# [DESCRIPTION](#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](#OPTIONS)

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

[**-v**, **--version**](#v)

Displays the version of *radvdump* and then aborts.

[**-h**, **--help**](#h)

Displays a short usage description and then aborts.

[**-f**, **--file-format**](#f)

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**](#e)

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

[**-d** debuglevel, **--debug** debuglevel](#d)

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](#u)

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](#FILES)

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

# [BUGS](#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](#SEE_ALSO)

[**radvd**(8)](/man/enterprise-packages/radvd/radvd.8), [**radvd.conf**(5)](/man/enterprise-packages/radvd/radvd.conf.5)

# [AUTHORS](#AUTHORS)

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

30 Dec 2024 radvd 2.21

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Document: radvdump(8) from radvd 2.21-r1 (Chainguard OS)