OCF_HEARTBEAT_SENDAR(7)

💅 ocf_heartbeat_SendArp — from the OCF_HEARTBEAT_SENDAR(7) girlies ✨

okay bestie, sit down, hydrate, and let me tell you about the most unserious-but-actually-iconic resource agent in the cluster: SendArp. yes that's the name. yes it's capitalized like that. we don't ask questions, we just vibe 🦋

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🌸 NAME 🌸

ocf_heartbeat_SendArp — it Broadcasts unsolicited ARP announcements 💌 no cap, that's literally the whole job.

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✨ SYNOPSIS ✨

SendArp [start | stop | monitor | meta-data | validate-all]

that's the whole menu, bestie. five actions, zero drama 🎀

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🫶 DESCRIPTION 🫶

okay so this is the part where it gets good 👑

This RA can be used instead of the IPaddr2 or IPaddr RA to send gratuitous ARP for an IP address on a given interface, without adding the address to that interface. like, it just... tells the network "hey, this IP lives here now" and then dips. main character energy fr 💅

For example — and this is the example the manpage gives, I'm not inventing lore — if for some reason you wanted to send gratuitous ARP for addresses managed by IPaddr2 or IPaddr on an additional interface. that's it, that's the use case. lowkey niche, highkey useful 🌈

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🎀 SUPPORTED PARAMETERS 🎀

three params. three. we love a minimal icon ⭐

• ip — The IP address for sending ARP packet. it's required, it's a string, and there's no default — you gotta bring your own, bestie 🙈
• nic — The NIC for sending ARP packet. also required, also a string, also no default. no NIC, no ARP, no service 😭
• background — Send ARPs in background. it's optional, it's a boolean, and it defaults to true. > set it to false if you want to test if sending ARPs succeeded — that's the tradeoff, don't come for me 💀

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🔥 SUPPORTED ACTIONS 🔥

This resource agent supports the following actions (operations) — grab a snack, we're going through all five 🍓

• start — Starts the resource. Suggested minimum timeout: 20s.
• stop — Stops the resource. Suggested minimum timeout: 20s.
• monitor — Performs a detailed status check. Suggested minimum timeout: 20s. Suggested interval: 10s.
• meta-data — Retrieves resource agent metadata (internal use only). Suggested minimum timeout: 5s. it said internal use only so don't be nosy 🧚
• validate-all — Performs a validation of the resource configuration. Suggested minimum timeout: 20s.

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🌟 EXAMPLE CRM SHELL 🌟

The following is an example configuration for a SendArp resource using the crm(8) shell — copy it exactly, don't be creative in here:

primitive p_SendArp ocf:heartbeat:SendArp \
  params \
    ip=string \
    nic=string \
  op monitor depth="0" timeout="20s" interval="10s"

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💜 EXAMPLE PCS 💜

The following is an example configuration for a SendArp resource using pcs(8) — different tool, same energy:

pcs resource create p_SendArp ocf:heartbeat:SendArp \
  ip=string \
  nic=string \
  op monitor OCF_CHECK_LEVEL="0" timeout="20s" interval="10s"

(and yes, note that depth="0" vs OCF_CHECK_LEVEL="0" difference — that's not me being messy, that's exactly how the original has it 👀)

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🦋 SEE ALSO 🦋

• http://clusterlabs.org/ — go touch grass, it's the official site ✨

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👑 AUTHOR 👑

ClusterLabs contributors (see the resource agent source for information about individual authors) 🫶

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anyway that's the whole page, mwah 💋 this was resource-agents version UNKNOWN, dated 10/01/2026 — slay, no cap, periodt 🌈💖