Support

The device doesn't answer (Timeout)

A timeout means no reply came back on UDP 161. Run the connection doctor from the device screen: it checks the network, Local Network access and the reply step by step. Then check the device:

• SNMP is on for the interface or VLAN your phone reaches.
• The device accepts requests from your phone's address. Many agents keep a list of allowed hosts or an access list.
• The community or the SNMPv3 user matches what you entered.
• No firewall between you and the device drops UDP 161.

The app reports a wrong password only when the agent says so. Some agents, net-snmp among them, stay silent on a wrong SNMPv3 privacy password, so that case can show up as a timeout too.

SNMPv3: Authentication failed or an unknown user

The agent answered with a report that names the step that failed:

• usmStatsUnknownUserNames: the agent doesn't know this user name. Check the spelling and the case.
• usmStatsWrongDigests: the authentication password or protocol doesn't match. SHA-1 and SHA-256 count as different protocols.
• usmStatsDecryptionErrors: the privacy password, protocol or key variant doesn't match, for example AES-128 against AES-256.
• usmStatsUnsupportedSecLevels: the agent doesn't accept this security level, such as authPriv for a user set up as authNoPriv.

Edit the credentials from the doctor's result and run it again.

Local Network access is off

iOS asks once, before the app first reads an address you entered. If you tapped Don't Allow, open iOS Settings › Privacy & Security › Local Network and turn on SNMP Inspector. The demo devices work without this permission.

A table shows “not exposed”, or a list is empty

Not exposed means the agent doesn't serve that table: the app asked, and the device answered without it. On many devices you turn on LLDP or PoE monitoring, or widen the SNMP view, before the device serves those tables over SNMP.

An empty list with a reason, such as no LLDP neighbor on any port, means the agent serves the table and it has no rows. The compatibility page shows what the tested devices served.

Rates are missing, or the app shows a counter reset

A rate needs two reads of the same counter, so traffic and error rates appear after the second poll. If the agent restarts between reads, its counters start from zero: the app marks the reset and leaves a gap in the chart instead of a spike.

The app reads 64-bit counters when the agent has them. A 32-bit counter on a 1G port wraps in about 34 seconds, so on older agents keep the polling interval short.

Camera access is off

The app asks for the camera when you first take a photo for a job. To allow it later, open iOS Settings › Apps › SNMP Inspector and turn on Camera. You can save a job without a photo.

Turn off crash reports or usage analytics

In the app, open Settings › Privacy and sharing and turn off Crash reports, Usage analytics or both. The privacy policy lists what each one sends.

Delete everything the app stores

Settings › Delete all data removes devices, credentials, jobs, photos, notes and reports from this device. Reports you already shared stay where you sent them.

Install it on another iPhone or iPad

Sign in with the same Apple Account and find SNMP Inspector in App Store › your account › Purchased. One purchase covers iPhone and iPad, and Family Sharing lets your family install it too. Devices and credentials don't sync between your devices: add them on each one.

Refunds

Apple sells the app and handles refunds. Ask for one at reportaproblem.apple.com with the Apple Account you bought it with.