snmpwalk

SNMPWALK(1)                        Net-SNMP                        SNMPWALK(1)



NAME
       snmpwalk - retrieve a subtree of management values using SNMP GETNEXT
       requests

SYNOPSIS
       snmpwalk [APPLICATION OPTIONS] [COMMON OPTIONS] AGENT [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.

       -CE {OID}
               End the walk at the specified OID, rather than a simple
               subtree.  This can be used to walk a partial subtree, selected
               columns of a table, or even two or more tables within a single
               command.

       -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.

EXAMPLES
       Note that snmpwalk REQUIRES  an argument specifying the agent to query
       and at most one OID argument, as described there.  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
       (plus the contents of the sysORTable).

       The command:

       snmpwalk -Os -c public -v 1 -CE sysORTable zeus system

       will retrieve the scalar values, but omit the sysORTable.

SEE ALSO
       snmpcmd(1), snmpbulkwalk(1), variables(5).



V5.8                              28 May 2007                      SNMPWALK(1)