Please check the following:
・SNMP of devices should be valid.
・SNMP community that has been set to devices should be same as the one that has been set to netLD credential.
・Ping/SNMP to devices should not be shut out by Firewall or antivirus software.
・Multiple network groups should not exist on “Network Groups” of credential/protocol. netLD has been revised to display the result of discovery and error. [Device added.] This is a state that the device has been successfully discovered and added to device inventory list. [There was no SNMP response.] This is a state that the device responded to Telnet, SSH or Ping, but not SNMP request. Please make sure that SNMP of device is vaild.
For setting method of SNMP of Cisco device, please refer to the following:
https://www.cisco.com/c/en/us/support/docs/ip/simple-network-management-protocol-snmp/7282-12.html
[No adapter matches] This is a state that the device responded to SNMP request, but no adapters match to netLD. Please make sure that if netLD supports the device. Devices [Server protocol settings for SNMP for this device are disabled.] This is a state that SNMP protocol in “Inventory” -> “Protocols” is disabled for the network group. Please check protocol settings. [There was no ICMP ping response.] This is a state that the device did not respond to ICMP ping request. (This status is only available for discovering single IP address.) Please make sure that ping/SNMP to devices is not shut out by Firewall or antivirus software. [Unable to establish TCP connection on port 22(SSH) or 23(Telnet).] This is a state that netLD cannot connect to port 22(SSH) and 23(Telnet) of the device. (This status is only available for discovering single IP address.) Please make sure that if those ports are available.