Reading Managed Object ValuesYou may only retrieve (read) managed object values if your management station is a member of the same community as the SNMP agent.Dell Networking supports RFC 4001, Textual Conventions for Internet Work Addresses that defines values representing a type of internetaddress. These values display for ipAddressTable objects using the snmpwalk command.There are several UNIX SNMP commands that read data.• Read the value of a single managed object.snmpget -v version -c community agent-ip {identifier.instance | descriptor.instance}• Read the value of the managed object directly below the specified object.snmpgetnext -v version -c community agent-ip {identifier.instance | descriptor.instance}• Read the value of many objects at once.snmpwalk -v version -c community agent-ip {identifier.instance | descriptor.instance}Examples of Reading the Value of Managed ObjectsIn the following example, the value “4” displays in the OID before the IP address for IPv4. For an IPv6 IP address, a value of “16” displays.> snmpget -v 2c -c mycommunity 10.11.131.161 sysUpTime.0DISMAN-EVENT-MIB::sysUpTimeInstance = Timeticks: (32852616) 3 days, 19:15:26.16> snmpget -v 2c -c mycommunity 10.11.131.161 .1.3.6.1.2.1.1.3.0The following example shows reading the value of the next managed object.> snmpgetnext -v 2c -c mycommunity 10.11.131.161 .1.3.6.1.2.1.1.3.0SNMPv2-MIB::sysContact.0 = STRING:> snmpgetnext -v 2c -c mycommunity 10.11.131.161 sysContact.0The following example shows reading the value of the many managed objects at one time.> snmpwalk -v 2c -c mycommunity 10.11.131.161 .1.3.6.1.2.1.1SNMPv2-MIB::sysDescr.0 = STRING: Dell Real Time Operating System SoftwareDell Operating System Version: 1.0Dell Application Software Version: E_MAIN4.9.4.0.0Copyright (c) 1999-2014 by DellBuild Time: Mon May 12 14:02:22 PDT 2008SNMPv2-MIB::sysObjectID.0 = OID: SNMPv2-SMI::enterprises.6027.1.3.1DISMAN-EVENT-MIB::sysUpTimeInstance = Timeticks: (32920954) 3 days, 19:26:49.54SNMPv2-MIB::sysContact.0 = STRING:Writing Managed Object ValuesYou may only alter (write) a managed object value if your management station is a member of the same community as the SNMP agent,and the object is writable.Use the following command to write or write-over the value of a managed object.• To write or write-over the value of a managed object.snmpset -v version -c community agent-ip {identifier.instance | descriptor.instance}syntaxvalueExample of Writing the Value of a Managed Object> snmpset -v 2c -c mycommunity 10.11.131.161 sysName.0 s "R5"SNMPv2-MIB::sysName.0 = STRING: R5Simple Network Management Protocol (SNMP) 865
