Common Issue:
Printers are installed on the network but are not being detected or scanned by Maprix’s Meters Software.
Root Causes to Check:
1. Printer Network Connectivity
Confirm the printer is powered on and connected to the correct network (same VLAN/subnet as the Maprix Service Client).
Ping the printer's IP address from the Maprix Service machine:
ping [printer IP]
If no reply → network issue or wrong printer IP.
2. SNMP Settings on Printer
SNMP must be enabled on the printer.
Printer must accept SNMPv1 queries (standard, UDP port 161).
Community String should be set to
public(unless customized).Printer should allow SNMP access without authentication (default for monitoring).
3. Firewall Blocking SNMP
Local Windows Firewall on the Maprix Service machine must allow outbound UDP port 161.
Network firewall must allow traffic:
From Maprix Service → printer over UDP port 161.
No deep packet inspection or port blocking.
4. Printer-Side Restrictions
Some printers may have SNMP restrictions:
Allow only specific IP ranges for SNMP access → verify settings.
SNMP is limited to management interfaces → verify printer firmware/network settings.
5. Wrong IP Address or Printer Offline
Double-check the printer list:
IP assigned matches the IP Maprix scans.
Static IP or DHCP reservation is in place.
6. SNMP Errors or Timeouts
If SNMP is enabled but printer doesn't fully respond (timeouts):
Printer SNMP agent might be misbehaving or firmware bug.
Power cycle printer.
Check for firmware updates.
Step-by-Step Troubleshooting Process:
Step | What to Do | Command or Action |
1 | Ping the printer from the Maprix Service machine |
|
2 | SNMP Walk the printer (check SNMP response) | Use SNMP Walk Tool |
3 | Check Printer SNMP settings (Community String, SNMP enabled) | Printer Web Interface → Settings |
4 | Check Firewall on Service PC | Allow outbound UDP 161 |
5 | Check Network Router/Switch | Allow SNMP packets |
6 | Confirm printer IP and online status | Printer Control Panel or DHCP Server |
Tip:
You can use our lightweight SNMP Walk Tool to test if the printer responds correctly to SNMP.
Download it.
Run it.
Enter the printer's IP, Community
public, SNMP Version 1.If no response, there is a network/SNMP issue that needs to be fixed.
FAQ
Q: The printer responds to ping but still not scanned. Why?
Ping uses ICMP, scanning uses SNMP (UDP 161). Firewall/SNMP misconfiguration is likely.
Q: We see some printers, but not all. What's the difference?
Some printers may have SNMP disabled or firewall rules blocking SNMP responses.
Q: Can we scan printers on a different VLAN?
Only if there is SNMP traffic routing allowed between VLANs. Otherwise, scanning is limited to the local VLAN/subnet.
Q: How often does Maprix scan?
By default, once every 24 hours. If the device was offline during scan time, it won't be reported.
Q: Can Maprix scan via hostname instead of IP?
No. SNMP communication is done via IP addresses. Hostnames are not used for scanning.
Quick Tools You Can Use:
Tool | Purpose |
| Check basic network reachability |
| Command-line SNMP query (advanced) |
Windows GUI SNMP tester (easy to use) |
Final Note:
If all basic troubleshooting fails, escalate to Maprix support: support@maprix.com
for deeper packet capture analysis to identify blocked SNMP packets or misconfigured devices.