Using SNMP 3-9Accessing SwitchAgentsIn order to have access to the SNMP agent residing in the Switch, atleast one VLAN on the Switch must have an IP address assigned to it.For more information on assigning an IP address, refer to “ManuallyConfiguring the IP Settings,” on page 3-6.SavingConfigurationChangesIf you make configuration changes to the Switch using an SNMPmanager, you must save the changes so that they are not lost on thenext Switch reboot. You can save your changes by using the SNMP saveattribute, or by issuing the save command from the command lineinterface.Supported MIBs In addition to private MIBs, the Switch 3800 supports the standardMIBs listed in Table 3-2.Supported Traps A trap is a message sent by an SNMP agent to an authorized trapreceiver (usually a network management station) to indicate theoccurrence of a significant event, such as an error condition or athreshold that has been reached. The Switch 3800 supports the trapslisted in Table 3-3.Table 3-2 Supported MIBsDescription RFC NumberMIB II 1213Bridge MIB 1493RMON 1757RMON II Probe Configuration 2021Evolution of Internet 1573Table 3-3 Supported TrapsTrap DescriptionCold start Indicates that the device is reinitializing itself.Link up Indicates that the device recognizes that one of itscommunication links has come up.Link down Indicates that the device recognizes a failure in one ofthe communication links represented in the agent’sconfiguration.Rising alarm Indicates that an RMON alarm entry has crossed itsrising threshold(continued)
