phpman > man > snmpwalk(1)

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).



V5.9.1                                       28 May 2007                                 SNMPWALK(1)