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).





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