---
name: "mopprobe"
section: "1"
platform: "openbsd"
package: "man"
version: "8.0-current-20261101"
release: "OpenBSD 8.0-current (2026-11-01)"
platforms: ["linux", "openbsd"]
url: "https://new.carta.tech/mopprobe"
---

# mopprobe(1)

MOP Probe Utility

## NAME

**mopprobe** – MOP Probe Utility

## SYNOPSIS

**mopprobe** \[**-3** \| **-4**\] \[**-aov**\] *interface*

## DESCRIPTION

**mopprobe** prints the Ethernet address and nodename of DECserver 100/200/250/300 on the Ethernet connected to *interface* or all known interfaces if **-a** is given. If **-o**, inhibits all messages but the first from a node. With **-v** all MOP/RC SID messages will be shown (e.g., machines running DECnet).

The options are as follows:

- **-3**

  Ignore MOP V3 messages (Ethernet II).

- **-4**

  Ignore MOP V4 messages (Ethernet 802.3).

- **-a**

  Listen on all the Ethernets attached to the system. If **-a** is omitted, an interface must be specified.

- **-o**

  Print a node just once.

- **-v**

  Show all nodes sending MOP/RC SID messages.

## SEE ALSO

[mopa.out(1)](/mopa.out/1.md), [mopchk(1)](/mopchk/1.md), [moptrace(1)](/moptrace/1.md), [mopd(8)](/mopd/8.md)

## AUTHORS

Mats O Jansson ⟨*moj@stacken.kth.se*⟩