Reference Guide

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}
Example of Reading the Value of a Single Managed Object
Example of Reading the Value of the Next Managed Object
Example of Reading the Value of Many Managed Objects at Once
In 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.0
DISMAN-EVENT-MIB::sysUpTimeInstance = Timeticks: (32852616) 3 days, 19:15:26.16
> snmpget -v 2c -c mycommunity 10.11.131.161 .1.3.6.1.2.1.1.3.0
> snmpgetnext -v 2c -c mycommunity 10.11.131.161 .1.3.6.1.2.1.1.3.0
SNMPv2-MIB::sysContact.0 = STRING:
> snmpgetnext -v 2c -c mycommunity 10.11.131.161 sysContact.0
> snmpwalk -v 2c -c mycommunity 10.11.131.161 .1.3.6.1.2.1.1
SNMPv2-MIB::sysDescr.0 = STRING: Dell Force10 Real Time Operating System
Software
Dell Force10 Operating System Version: 1.0
Dell Force10 Application Soft;ware Version: E_MAIN4.7.6.350
Copyright (c) 1999-2007 by Dell Force10
Build Time: Mon May 12 14:02:22 PDT 2008
SNMPv2-MIB::sysObjectID.0 = OID: SNMPv2-SMI::enterprises.6027.1.3.1
DISMAN-EVENT-MIB::sysUpTimeInstance = Timeticks: (32920954) 3 days, 19:26:49.54
SNMPv2-MIB::sysContact.0 = STRING:
Writing Managed Object Values
You 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}syntax value
Example 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: R5
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Simple Network Management Protocol (SNMP)