arpsend(8)

✨ arpsend(8) — the Containers-era glow-up ✨

okay bestie, sit down, hydrate, and let me tell you about arpsend from the Containers manual section. she's a networking girlie and she's here to yell at your local network 💅

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🌸 NAME 🌸

arpsend — literally just send ARP requests. that's the whole vibe. no cap.

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🦋 SYNOPSIS 🦋

arpsend -D -e target_ip [ -e target_ip ...]  [-c count] [-w timeout]
        interface

arpsend -U -i source_ip [-c count] [-w timeout] interface

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💖 DESCRIPTION 💖

so the utility arpsend sends ARP packets out on device interface, and its whole main character purpose is to detect or update neighbours' ARP caches with a given IP. that's it. that's the job. she does it flawlessly 🫶

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👑 COMMANDS 👑

run the utility with one of the following commands, bestie (pick one, not both, it's giving decisive):

• -D — sends a broadcast ARP request to detect neighbours with target_ip. you have to specify target_ip (that's the -e option, keep reading 📖).
• -U — sends a broadcast ARP request to update neighbours' ARP caches with source_ip. you have to specify source_ip (that's the -i option, iykyk).

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✨ OPTIONS ✨

• -c count — how many packets to send. default is infinity 😭 yes fr, she will just keep going forever unless you tell her to chill.
• -w interval — the interval between packets, in seconds. default is 1 second.
• -i source_ip_address — sets the source IP address field in the ARP packet.
• -e target_ip_address — sets the target IP address field in the ARP packet. note that you can specify the -e option multiple times to detect many IP addresses in one utility call. she's multitalented, obsessed 💅

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💀 EXIT STATUS 💀

arpsend returns 0 upon successful execution. if something goes wrong, it returns an appropriate error code. (and bestie, things do go wrong sometimes, so here's the chart:)

1. 1 — EXC_USAGE — usage error 🙈
2. 2 — EXC_SYSTEM — system error 😭
3. 3 — EXC_RECV — ARP reply was received (not me getting a reply when I wasn't expecting one 💀)

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🌈 EXAMPLES 🌈

to send a request on interface eth0 to detect any neighbour computers with IP 192.168.10.200:

arpsend -D -e 192.168.10.200 eth0

to send a request on interface eth0 to update neighbours' ARP caches with IP 192.168.10.200:

arpsend -U -i 192.168.10.200 eth0

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🎀 NOTES 🎀

the interface you use has to be arpable and must not be loopback. like, /sbin/ip link show interface should show neither NOARP nor LOOPBACK flags in the interface parameters. if it does, she's not the one, bestie 🚫

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🧚 SEE ALSO 🧚

• vzctl(8).

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💜 LICENSE 💜

Copyright (C) 2000-2011, Parallels, Inc. Licensed under GNU GPL.

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and that's the whole page, gorgeous ⭐ she's arpsend(8) from the OpenVZ source, dated 18 Mar 2012, and yes the footer matches the header because she's consistent like that 💖 slay, go ping your neighbours, periodt 🦋