Configuring SNMP 329You can configure various features on the switch to generate SNMP traps thatinform the NMS about events or problems that occur on the switch. Trapsgenerated by the switch can also be viewed locally by using the Web-basedinterface or CLI.Why Is SNMP Needed?Some network administrators prefer to use SNMP as the switch managementinterface. Settings that you view and configure by using the Web-based DellOpenManage Switch Administrator and the CLI are also available by usingSNMP.If you do not use NMS software to manage or monitor other devices on yournetwork, it might not be necessary to configure SNMP on the switch.Default SNMP ValuesBy default, SNMPv2 is automatically enabled on the device. SNMPv1 andSNMPv3 are disabled. To enable SNMPv3, you must define a local engine IDfor the device. The local engineID is by default set to the switch MACaddress, however when the switch operates in a stacking mode, it is importantto manually configure the local engineID for the stack. This local engineIDmust be defined so that it is unique within the network. It is important to dothis because the default engineID in a stack is the MAC address of the masterunit, which may change if the master unit fails and another unit takes overthe stack.Table 12-1 summarizes the default values for SNMP.Table 12-1. SNMP DefaultsParameter Default ValueSNMPv1 DisabledSNMPv2 EnabledSNMPv3 DisabledSNMP traps EnabledSNMP trap receiver None configuredSwitch traps Enabled
