Connect an SNMP device

Read OIDs from SNMP-capable equipment (UPS, switches, PDUs, environmental sensors).

Protocol: snmp

Connection fields:

Field Meaning
host Device IP/hostname
port SNMP port (default 161)
community Community string (v1/v2c)
version 1, 2c, or 3
pollIntervalMs Poll interval (ms)

Steps

  1. Ensure SNMP is enabled on the device and reachable from the gateway/network.
  2. Add a device with protocol snmp and enter the fields above.
  3. Map each OID to a tag.

snmp/poll-error events indicate an unreachable host, wrong community string, or version mismatch.

Auto-disable after repeated failures: if a poll fails 10 times in a row, Synacl stops querying the device and marks it Polling disabled (a device/poll-disabled event is raised). Fix the cause, then click Re-enable polling on the device page — querying resumes within about a minute. See My device shows offline.

More in Devices
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When you need a gateway, and when a device can talk to us directly.
Device parameters (tags) explained
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How device online/offline status works
A device is online if we've seen a message in the last 90 seconds.
Alert thresholds (and the yellow dot)
Set a high/low range on a tag; the device dot turns yellow when a reading goes out of range.
Why a device gets suspended
Repeated rate-limit violations suspend a device temporarily — here's the cycle.
Editing, moving, and deleting a device
Change a device's name, connection settings, gateway, or remove it.