---
name: "ladvd"
section: "8"
platform: "linux"
package: "ladvd"
version: "1.1.2-4"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/ladvd"
---

# ladvd(8)

send link layer advertisements

## NAME

ladvd - send link layer advertisements

## SYNOPSIS

**ladvd \[ -a \]** **\[** *INTERFACE* **\] \[** *INTERFACE* **\]** **...**

## DESCRIPTION

**ladvd** sends LLDP (Link Layer Discovery Protocol) advertisements on all available interfaces. This makes connected hosts visible on managed switches. By default it will run as a privilege-separated daemon. Additional protocols can be enabled using the -C, -E, -F and -N options. Optionally a list of interfaces which **ladvd** should utilize can be supplied. Please note that only physical or bond/bridge interfaces can be specified, vlan interfaces can only be auto-detected.

## INTERFACES

**ladvd** detects and uses all configured (UP) physical Ethernet interfaces by default, wireless interfaces can be enabled via the -w option. Additionally **ladvd** will recognize bundled interfaces (bridges, bonding) and use these to transmit additional information. The result is that normally it should not be necessary to specify interfaces on the **ladvd** command-line. The only reason for specifying interfaces is to explicitly exclude a particular interface.

## OPTIONS

- \-a

  Auto-enable protocols based on received packets (also enables receive mode).

- \-d

  Dump pcap-compatible packets to stdout which can be piped to tcpdump (via "\| tcpdump -r -") or redirected to a file for further analysis.

- \-e interface

  Exclude a particular interface, no packets will be transmitted on this interface.

- \-f

  Run in the foreground and send logging to stderr.

- \-h

  Print usage instructions.

- \-m interface

  The management interface for this host. Addresses on this interface are auto-detected (IPv4 and IPv6).

- \-n

  Use addresses of the management interface specified via -m for all interfaces.

- \-o

  Run only once, useful for quick troubleshooting.

- \-r

  Receive packets, and use them for various features.

- \-s

  Be silent, don't transmit any packets.

- \-q

  Use each interface's hwaddr the generate the chassis-id TLV. Not recommended because the chassis-id should be the same for all interfaces.

- \-t

  Use Tun/Tap interfaces.

- \-u user

  Switch to this user (defaults to ladvd)

- \-v

  Increase logging verbosity.

- \-w

  Use wireless interfaces.

- \-y

  Save received peer hostname and port description in interface descriptions (requires SIOCSIFDESCR support) or Linux ifAliases. This also enables receive mode.

- \-z

  Save received peer hostname and port name in interface descriptions (requires SIOCSIFDESCR support) or Linux ifAliases. This also enables receive mode.

- \-c \<CC\>

  Specify a two-letter ISO 3166 country code (required for LLDP location support).

- \-l \<location\>

  Specify the physical location of the host.

- \-L

  Enable LLDP (Link Layer Discovery Protocol).

- \-C

  Enable CDP (Cisco Discovery Protocol).

- \-E

  Enable EDP (Extreme Discovery Protocol).

- \-F

  Enable FDP (Foundry Discovery Protocol).

- \-N

  Enable NDP (Nortel Discovery Protocol) formerly called SynOptics Network Management Protocol (SONMP).

## AUTHOR

Sten Spans \<sten@blinkenlights.nl\>