Simulator Guide
Simulator is the current release page for controlling the SNMP responder.
It keeps the familiar operator flow:
- configure the responder port and community
- edit custom OID data as JSON
- start, stop, or restart the responder
- inspect the local activity log
Before You Start
For the smoothest workflow:
- choose the host UDP port you want to expose
- use the same value in the page and in your deployment
- keep community
public unless your test requires something else
For the default installer path, local responder validation usually uses
1061/udp.
The editor accepts a JSON object that maps symbolic or numeric OIDs to simple
values.
Example:
{
"SNMPv2-MIB::sysName.0": "demo-agent",
"IF-MIB::ifSpeed.1": 1000,
"1.3.6.1.2.1.1.6.0": "Lab Rack 7"
}
Practical notes:
- string values become OCTET STRING values
- integers become INTEGER values
- booleans are normalized to integer values
- symbolic names need the relevant MIBs loaded if you want resolution support
Starting And Stopping
The normal flow is:
- save the current JSON
- start the simulator
- verify the status card shows the expected port and community
- stop or restart as needed
While the simulator is running, the page locks configuration inputs so the live
binding is explicit.
Activity Log
The log pane records local lifecycle and request activity.
Use it to:
- confirm the responder actually started
- inspect request bursts during a walk
- filter by severity
- export or clear the current log view
Recommended Local Validation
- set custom data for one or two well-known OIDs
- start the simulator on port
1061
- open
Walk & Parse
- run a walk against
127.0.0.1:1061
- confirm the returned values match the simulator data
Common Failure Patterns
Check these first if the simulator does not behave as expected:
- UDP port conflict
- invalid JSON in the editor
- symbolic targets with missing MIB support
- querying the container-internal port instead of the host-exposed port