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SNMPBULKWALK(1) Net-SNMP SNMPBULKWALK(1)
NAME
snmpbulkwalk - retrieve a subtree of management values using SNMP GETBULK requests
SYNOPSIS
snmpbulkwalk [APPLICATION OPTIONS] [COMMON OPTIONS] AGENT [OID]
DESCRIPTION
snmpbulkwalk is an SNMP application that uses SNMP GETBULK requests to query a network en-
tity efficiently 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 GETBULK requests. All vari-
ables 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 ar-
gument is present, snmpbulkwalk will search MIB-2.
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 snmpbulkwalk to loop indef-
initely. By default, snmpbulkwalk tries to detect this behavior and warns you
when it hits an agent acting illegally. Use -Cc to turn off this behaviour.
-Ci Include the given OID in the search range. Normally snmpbulkwalk uses GETBULK re-
quests starting with the OID you specified and returns all results in the MIB tree
after that OID. Sometimes, you may wish to include the OID specified on the com-
mand line in the printed results if it is a valid OID in the tree itself. This
option lets you do this.
-Cn<NUM>
Set the non-repeaters field in the GETBULK PDUs. This specifies the number of
supplied variables that should not be iterated over. The default is 0.
-Cp Upon completion of the walk, print the number of variables found.
-Cr<NUM>
Set the max-repetitions field in the GETBULK PDUs. This specifies the maximum
number of iterations over the repeating variables. The default is 10.
In addition to these options, snmpbulkwalk takes the common options described in the snm-
pcmd(1) manual page. Note that snmpbulkget REQUIRES an argument specifying the agent to
query and at most one OID argument, as described above.
EXAMPLE
The command:
snmpbulkwalk -v2c -Os -c public 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
In contrast to snmpwalk, this information will typically be gathered in a single transac-
tion with the agent, rather than one transaction per variable found. snmpbulkwalk is thus
more efficient in terms of network utilisation, which may be especially important when re-
trieving large tables.
NOTE
As the name implies, snmpbulkwalk utilizes the SNMP GETBULK message, which is not avail-
able in SNMP v1.
SEE ALSO
snmpcmd(1), variables(5).
V5.9.1 01 May 2002 SNMPBULKWALK(1)
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On Apache
Under GNU General Public License
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