snmpwalk.1.def
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- .TH SNMPWALK 1 "08 Feb 2002" VVERSIONINFO "Net-SNMP"
- .UC 4
- .SH NAME
- snmpwalk - retrieve a subtree of management values using SNMP GETNEXT requests
- .SH SYNOPSIS
- .B snmpwalk
- [APPLICATION OPTIONS] [COMMON OPTIONS] [OID]
- .SH DESCRIPTION
- .B snmpwalk
- is an SNMP application that uses SNMP GETNEXT requests to query a
- network entity for a tree of information.
- .PP
- An object identifier (OID) may be given on the command line. This OID
- specifies which portion of the object identifier space will be
- searched using GETNEXT requests. All variables in the subtree
- below the given OID are queried and their values presented to the user.
- Each variable name is given in the format specified in
- .IR variables(5) .
- .PP
- If no OID argument is present,
- .B snmpwalk
- will search the subtree rooted at SNMPv2-SMI::mib-2
- (including any MIB object values from other MIB modules,
- that are defined as lying within this subtree).
- If the network entity has an error processing the request packet, an
- error packet will be returned and a message will be shown, helping to
- pinpoint why the request was malformed.
- .PP
- If the tree search causes attempts to search beyond the end of the
- MIB, the message "End of MIB" will be displayed.
- .SH OPTIONS
- .TP 8
- .B -Cc
- Do not check whether the returned OIDs are increasing. Some agents
- (LaserJets are an example) return OIDs out of order, but can
- complete the walk anyway. Other agents return OIDs that are out of
- order and can cause
- .B snmpwalk
- to loop indefinitely. By default,
- .B snmpwalk
- tries to detect this behavior and warns you when it hits an agent
- acting illegally. Use
- .B -Cc
- to turn off this check.
- .TP
- .B -Ci
- Include the given OID in the search range. Normally
- .B snmpwalk
- uses GETNEXT requests starting with the OID you specified and returns
- all results in the MIB subtree rooted at that OID. Sometimes, you may
- wish to include the OID specified on the command line in the printed
- results if it is a valid OID in the tree itself. This option lets you
- do this explicitly.
- .TP
- .B -CI
- In fact, the given OID will be retrieved automatically if the main
- subtree walk returns no useable values. This allows a walk of a
- single instance to behave as generally expected, and return the
- specified instance value.
- This option turns off this final GET request, so a walk of a
- single instance will return nothing.
- .TP
- .B -Cp
- Upon completion of the walk, print the number of variables found.
- .TP
- .B -Ct
- Upon completion of the walk, print the total wall-clock time it took
- to collect the data (in seconds). Note that the timer is started just
- before the beginning of the data request series and stopped just after
- it finishes. Most importantly, this means that it does not include
- snmp library initialization, shutdown, argument processing, and any
- other overhead.
- .PP
- In addition to these options,
- .B snmpwalk
- takes the common options described in the
- .I snmpcmd(1)
- manual page.
- .SH EXAMPLE
- The command:
- .PP
- snmpwalk -Os -c public -v 1 zeus system
- .PP
- will retrieve all of the variables under system:
- .PP
- sysDescr.0 = STRING: "SunOS zeus.net.cmu.edu 4.1.3_U1 1 sun4m"
- .br
- sysObjectID.0 = OID: enterprises.hp.nm.hpsystem.10.1.1
- .br
- sysUpTime.0 = Timeticks: (155274552) 17 days, 23:19:05
- .br
- sysContact.0 = STRING: ""
- .br
- sysName.0 = STRING: "zeus.net.cmu.edu"
- .br
- sysLocation.0 = STRING: ""
- .br
- sysServices.0 = INTEGER: 72
- .SH "SEE ALSO"
- snmpcmd(1), snmpbulkwalk(1), variables(5).