SNMP Inspector: Port Check · iPhone and iPad
SNMP Inspector reads link, speed, duplex and errors per second over SNMP. Capture the switch before your work and after it, get a verdict for each port and hand over a PDF report.
Each screen on this page is the real app on its built-in demo devices. You can open the same screens before you connect your own switch.
The port card shows link state, speed, duplex, traffic and errors per second as they change. Below that you get the VLAN, PoE, the LLDP neighbor and the MAC addresses behind the port, with IP addresses from ARP when the device has them.
Capture Before, do the work, capture After. Each changed port gets a verdict; tap it to see the rule behind it. Mark what you expect on a port, such as Link comes up or Port is freed, and the app checks the result against your plan.
Export the job as PDF or Markdown for the ticket, or as CSV and JSON for your own tools. Your photos and notes go in. Communities and passwords stay out, and you can hide addresses before you share the file.
PDFMarkdownCSVJSON
The faceplate draws the switch as a grid of ports, and the port with growing errors stands out. Type a MAC or IP address and the app reads the forwarding and ARP tables to name the port where that device sits.
Guide: find which switch port a device is on
The app reads the port every 1-2 seconds. When the link comes up, the phone plays a haptic and a sound, then shows speed and duplex. Which port changed highlights the port that goes up or down as you move a cable.
The doctor checks the network, Local Network access, the reply on UDP 161 and the credentials step by step. If an SNMPv3 agent rejects the password, you see Authentication failed. If the agent stays silent, you see a timeout and a list of likely causes.
Scan up to a /22. The app lists the agents that reply, with their SNMP version and identity, and adds them to a site in one tap.
Walk or GET an OID by number or by name. The standard MIB modules ship with the app, and you can import your own .mib, .my or .txt files.
You give the app a community or an SNMPv3 password for live network gear. Four rules cover what the app does with them.
The app has no SNMP SET operation and never writes to a device.
Communities and SNMPv3 passwords stay in the iOS Keychain on this device and never appear in reports.
Your phone talks to the switch over UDP 161. No server of ours sits in between.
Crash reports and usage analytics start on, and you can turn each off in Settings. They carry no addresses, device names, MACs or credentials.
From App Store listings and screenshots, checked October 2026. A dash means the listing doesn't show the feature.
| SNMP Inspector | MIB Browser | SNMP Recon | SNMP Network Monitor | |
|---|---|---|---|---|
| Port card with errors per second, LLDP neighbor and MACs | Yes | Add OIDs by hand | Raw ifTable row | Interface traffic |
| Before and after with a verdict per port | Yes | Two saved walks side by side | — | — |
| PDF report on iPhone | Yes | — | Mac only | — |
| Wait for link with haptic and sound | Yes | — | — | — |
| MAC or IP address to switch port | Yes | — | — | ARP table only |
| Read-only, no SET | Yes | Not stated | Yes | Has SET |
| Price | $4.99 once | $6.99 once | $4.99 once | Free download, paid subscription |
$4.99 US price; the App Store shows yours
Three demo devices work offline: a 52-port switch with a bad cable, a router whose agent restarts and an SNMPv3 device for the doctor. A short tour walks through a job, its report and the MIB browser.
More answers on the support page.
If the switch answers SNMP v1, v2c or v3 and has IF-MIB, the app reads its ports. For LLDP neighbors, MAC tables, VLANs and PoE, the switch has to serve the matching standard MIBs. The compatibility page lists the devices we tested and what each one served.
No. The app has no SNMP SET and never writes to a device.
MD5, SHA-1 and SHA-2 for authentication, DES and AES for privacy. The app reads SNMP v1 and v2c with a community too.
No. The phone sends SNMP requests to the device over UDP 161, with no server in between. The device needs SNMP turned on and has to accept requests from the phone's address.
Each screenshot on this page shows the real app on its demo devices. After you buy, the same demo works offline, so you can learn each screen before you add your own switch.
No. You pay $4.99 once in the US App Store; in other countries the App Store shows the local price. One purchase covers iPhone and iPad, Family Sharing is on, and the app sells nothing inside.
Yes, on iPad and iPhone with iOS 18 or later. On iPad the device list, the job and the port sit side by side.
No. SNMP Inspector reads a device while you have the app open, for a check on site. For alerts around the clock, run a monitoring system such as LibreNMS, Zabbix or PRTG.
English, Russian, German, Spanish, French, Italian, Japanese, Korean, Brazilian Portuguese, and Simplified and Traditional Chinese.
Step-by-step answers to the questions that come up before and during a job at the rack.
SNMP Inspector: Port Check · $4.99 · iPhone and iPad · iOS 18 or later
