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] [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 net-
       work 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.

       -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.


EXAMPLE

       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


SEE ALSO

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



4th Berkeley Distribution         08 Feb 2002                      SNMPWALK(1)

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