SNMPWALK
Section: Net-SNMP (1)
Updated: 08 Feb 2002
Index Return to Main Contents
NAME
snmpwalk - retrieve a subtree of management values using SNMP GETNEXT requests
SYNOPSIS
snmpwalk [APPLICATION OPTIONS] [COMMON OPTIONS] [OID]
DESCRIPTION
snmpwalk is an SNMP application that uses SNMP GETNEXT requests to query a network entity for a
tree of information.
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 variables(5).
If no OID argument is present, 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.
If the tree search causes attempts to search beyond the end of the MIB, the message "End of MIB" will be displayed.
OPTIONS
- -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 snmpwalk to loop
indefinitely. By default, snmpwalk tries to detect this behavior and warns you when it hits an agent acting
illegally. Use -Cc to turn off this check.
- -Ci
- Include the given OID in the search range. Normally 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.
- -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.
- -Cp
- Upon completion of the walk, print the number of variables found.
- -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.
In addition to these options, snmpwalk takes the common options described in the snmpcmd(1) manual page.
EXAMPLE
The command:
snmpwalk -Os -c public -v 1 zeus system
will retrieve all of the variables under system:
sysDescr.0 = STRING: "SunOS zeus.net.cmu.edu 4.1.3_U1 1 sun4m"
sysObjectID.0 = OID: enterprises.hp.nm.hpsystem.10.1.1
sysUpTime.0 = Timeticks: (155274552) 17 days, 23:19:05
sysContact.0 = STRING: ""
sysName.0 = STRING: "zeus.net.cmu.edu"
sysLocation.0 = STRING: ""
sysServices.0 = INTEGER: 72
SEE ALSO
snmpcmd(1),
snmpbulkwalk(1),
variables(5).
Index
- NAME
- SYNOPSIS
- DESCRIPTION
- OPTIONS
- EXAMPLE
- SEE ALSO
This document was created by
man2html, using the manual pages.
Time: 13:12:00 GMT, September 23, 2007
