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).