man > 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 por‐
       tion 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  re‐
               turns no useable values.  This allows a walk of a single instance to behave as gener‐
               ally  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).

V5.9.4.pre2                                  28 May 2007                                 SNMPWALK(1)