NAME
snmpbulkwalk - retrieve a subtree of management values using SNMP
GETBULK requests
SYNOPSIS
snmpbulkwalk [APPLICATION OPTIONS] [COMMON OPTIONS] [OID]
DESCRIPTION
snmpbulkwalk is an SNMP application that uses SNMP GETBULK requests to
query a network entity 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 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, 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
indefinitely. 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 requests 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 command 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 snmpcmd(1) manual page.
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 transaction 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 retrieving
large tables.
NOTE
As the name implies, snmpbulkwalk utilizes the SNMP GETBULK message,
which is not available in SNMP v1.
SEE ALSO
snmpcmd(1), variables(5).