Simple Network Management Protocol (SNMP) is an OSI Layer 7 (Application Layer) designed specifically for managing and monitoring network devices. enables network management stations to read and modify the settings of gateways, routers, switches, and other network devices. Use to configure system features for proper operation, monitor performance and detect potential problems in the Switch or LAN.
Managed D-Linkthat support SNMP include software (referred to as an agent), which runs locally on the device. A defined set of variables (managed objects) is maintained by the SNMP agent and used to manage the device. These objects are defined in a Management Information Base (MIB), which provides a standard presentation of the information controlled by the on-board SNMP agent. SNMP defines both the format of the MIB specifications and the protocol used to access this information over the network. The default SNMP setting is disabled. Click enable, then Apply, to set Community Settings.
Community Setting: In support of SNMP version 1, the Web-Smart Switch accomplishes user authentication by using Community Settings that function as passwords. The remote user SNMP application and the Switch SNMP must use the same community string. SNMP packets from a station that are not authenticated are ignored (dropped).
The default community strings for the Switch used for SNMP v.1 management access are:
Public: The community with read-only privilege allows authorized management stations to retrieve MIB objects.
Private: The community with read/write privilege allows authorized management stations to retrieve and modify MIB objects.
Trap Setting: Traps are messages that alert network personnel of events that occur on the Switch. Such events can be as serious as a reboot (someone accidentally turned the Switch OFF), or less serious events such as a port status change. The Switch can generate traps and send them to the trap recipient (i.e. network administrator).
Setting up a Trap: Select Enable, enter a Trap Name, add the IP of the device to be monitored, and choosethe event(s) to trap. The available trap Events to choose from including:
·System Device Bootup
·Fiber Link Up / Link Down
·Fiber Abnormal Receive Error
·Fiber Abnormal Transmit Error
·Twisted Pair Link Up / Link Down
·Twisted Pair Abnormal Receive Error
·Twisted Pair Abnormal Transmit Error
·Power On/ Power Off & Power Threshold Above/Below (Only for P)
·PoE Power Fail (Only for DES-1228P)
·Power Over Current (Only for DES-1228P)
·Power Short Circuit (Only for DES-1228P)