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.TH SNMPBULKWALK 1 "01 May 2002" VVERSIONINFO "Net-SNMP"

.SH NAME

snmpbulkwalk - retrieve a subtree of management values using SNMP GETBULK requests

.SH SYNOPSIS

.B snmpbulkwalk

[APPLICATION OPTIONS] [COMMON OPTIONS] AGENT [OID]

.SH DESCRIPTION

.B snmpbulkwalk

is an SNMP application that uses SNMP GETBULK requests to query a

network entity efficiently for a tree of information.

.PP

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

.IR variables(5) .

If no OID argument is present,

.B snmpbulkwalk

will search MIB\-2.

.PP

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.

.PP

If the tree search causes attempts to search beyond the end of the

MIB, the message "End of MIB" will be displayed.

.SH OPTIONS

.TP 8

.B \-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

.B snmpbulkwalk

to loop indefinitely.  By default,

.B snmpbulkwalk

tries to detect this behavior and warns you when it hits an agent

acting illegally.  Use

.B \-Cc

to turn off this behaviour.

.TP

.B \-Ci

Include the given OID in the search range.  Normally

.B 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.

.TP

.BI \-Cn <NUM>

Set the

.I non-repeaters

field in the GETBULK PDUs.  This specifies the number of supplied

variables that should not be iterated over.  The default is 0.

.TP

.B \-Cp

Upon completion of the walk, print the number of variables found.

.TP

.BI \-Cr <NUM>

Set the

.I max-repetitions

field in the GETBULK PDUs.  This specifies the maximum number of

iterations over the repeating variables.  The default is 10.

.PP

In addition to these options,

.B snmpbulkwalk

takes the common options described in the 

.I snmpcmd(1)

manual page.

Note that

.B snmpbulkget

REQUIRES an argument specifying the agent to query

and at most one OID argument, as described above.

.SH EXAMPLE

The command:

.PP

snmpbulkwalk \-v2c \-Os \-c public zeus system

.PP

will retrieve all of the variables under system:

.PP

sysDescr.0 = STRING: "SunOS zeus.net.cmu.edu 4.1.3_U1 1 sun4m"

.br

sysObjectID.0 = OID: enterprises.hp.nm.hpsystem.10.1.1

.br

sysUpTime.0 = Timeticks: (155274552) 17 days, 23:19:05

.br

sysContact.0 = STRING: ""

.br

sysName.0 = STRING: "zeus.net.cmu.edu"

.br

sysLocation.0 = STRING: ""

.br

sysServices.0 = INTEGER: 72

.PP

In contrast to

.BR snmpwalk ,

this information will typically be gathered in a single transaction

with the agent, rather than one transaction per variable found.

.B snmpbulkwalk

is thus more efficient in terms of network utilisation, which may be

especially important when retrieving large tables.

.SH NOTE

As the name implies,

.B snmpbulkwalk

utilizes the SNMP GETBULK message, which is not available in SNMP v1.

.SH "SEE ALSO"

snmpcmd(1), variables(5).