Choose the polling method to use in the SolarWinds Platform
This topic applies to all SolarWinds Platform products.
Select a polling method to monitor nodes in the way that best suits your environment.
External Node (No Status)
Using this method, no data is collected from the node. This method is suitable for nodes hosting applications or other elements that you want to monitor with specific SolarWinds Platform products, such as SAM.
Use this method to build a complete map of the environment monitored by your SolarWinds Platform products.
Status Only: ICMP
Starting with Hybrid Cloud Observability 2023.2, HCO-licensed users can use this method without ICMP-polled nodes being counted against their node license.
This method monitors only the status. It measures the average response time and packet loss percentage for managed devices using the Internet Control Message Protocol (ICMP).
Use this method when you need limited information or to monitor devices that do not support SNMP or WMI.
This polling method requires that you enable ICMP on your nodes. Consider adjusting any network intrusion detection systems or your firewalls to allow for the ICMP traffic.
Most Devices: SNMP & ICMP
With this method, you can:
Get the device status, average response time, and packet loss percentage (ICMP)
Query the Management Information Base (MIB) and performance indicators tied to specific Object Identifiers (OIDs).
This method is suitable for SNMP-enabled devices such as routers, switches, and computers. You must provide SNMP community strings for SNMP v1 or v2c, or SNMP v3 credentials.
Your devices must have ICMP and SNMP enabled to use this polling method. If you want to poll with a specific version of SNMP, you must disable all other versions on the device.
Consider adjusting any network intrusion detection systems or your firewalls to allow for the ICMP traffic.
SNMPv3 is a secure version of the protocol that adds authentication and/or encryption. It may require additional configuration on your devices.
To poll the device with SNMPv3, specify the credentials, the authentication, and encryption.
Windows Servers: WMI and ICMP
This polling method can only be used for Windows computers. Windows Management Instrumentation (WMI) is a proprietary technology used to poll performance and management information from Windows-based network devices, applications, and components.
When used as an alternative to SNMP, WMI can provide much of the same monitoring and management data available with SNMP-based polling with the addition of Windows-specific communications and security features.
Your devices must have WMI and ICMP enabled to use this polling method. You can use
WBEMTest.exe, which is included on every computer that has WMI installed, to test the connectivity between your SolarWinds Platform server and your Windows computer.
Due to specific characteristics of WMI polling requests, polling a single WMI enabled object uses approximately five times the resources required to poll the same or similar object with SNMP on the same polling frequency. Consider adjusting any network intrusion detection systems or your firewalls to allow for the ICMP traffic.
Windows and Linux/Unix Servers: Agent
An agent is a software that provides a communication channel between the SolarWinds Platform server and a Windows or Linux/Unix-based computer. Agents are used to communicate the information that SolarWinds plug-ins collect to the SolarWinds Platform server.
Collected details depend on the type of plug-in installed on the agent. For example, the Quality of Experience plug-in collects packet traffic, while a SAM plug-in collects application data used to monitor the applications. Agents automatically download the plug-ins for all installed products.
This polling method is most useful in the following situations:
- When host and applications are behind firewall NAT or proxies
- Polling node and applications across multiple discrete networks that have overlapping IP address space
- Secure encrypted polling over a single port is required
- Support for low bandwidth, high latency connections
- Polling nodes across domains where no domain trusts have been established
- Full end-to-end encryption between the monitored host and the poller
VMware, Hyper-V or Nutanix entities
Meraki Wireless: API
Select this option to monitor Meraki wireless infrastructure.