In most cases, you do not need to use/install additional probes as D-View 7 server is embedded with a local probe.
However, you do need to use additional probes for the following scenarios:
- You want to manage devices in a remote site without VPN (SNMP inaccessible)
- You want to manage devices behind NAT without port/device mapping (SNMP inaccessible)
- You want to minimize the WAN utilization
- You want to share the loading of D-View 7 server. You can install probes on separated servers and assign them to manage specific devices to share the loading of D-View 7 server.