SNMP - Snmpwalk Manpage
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snmpwalk --help
USAGE: snmpwalk [OPTIONS] AGENT [OID]
Version: 5.9.3
Web: http://www.net-snmp.org/
Email: net-snmp-coders@lists.sourceforge.net
OPTIONS:
-h, --help display this help message
-H display configuration file directives understood
-v 1|2c|3 specifies SNMP version to use
-V, --version display package version number
SNMP Version 1 or 2c specific
-c COMMUNITY set the community string
SNMP Version 3 specific
-a PROTOCOL set authentication protocol (MD5|SHA|SHA-224|SHA-256|SHA-384|SHA-512)
-A PASSPHRASE set authentication protocol pass phrase
-e ENGINE-ID set security engine ID (e.g. 800000020109840301)
-E ENGINE-ID set context engine ID (e.g. 800000020109840301)
-l LEVEL set security level (noAuthNoPriv|authNoPriv|authPriv)
-n CONTEXT set context name (e.g. bridge1)
-u USER-NAME set security name (e.g. bert)
-x PROTOCOL set privacy protocol (DES|AES|AES-192|AES-256)
-X PASSPHRASE set privacy protocol pass phrase
-Z BOOTS,TIME set destination engine boots/time
General communication options
-r RETRIES set the number of retries
-t TIMEOUT set the request timeout (in seconds)
Debugging
-d dump input/output packets in hexadecimal
-D[TOKEN[,...]] turn on debugging output for the specified TOKENs
(ALL gives extremely verbose debugging output)
General options
-m MIB[:...] load given list of MIBs (ALL loads everything)
-M DIR[:...] look in given list of directories for MIBs
(default: $HOME/.snmp/mibs:/usr/share/snmp/mibs:/usr/share/snmp/mibs/iana:/usr/share/snmp/mibs/ietf)
-P MIBOPTS Toggle various defaults controlling MIB parsing:
u: allow the use of underlines in MIB symbols
c: disallow the use of "--" to terminate comments
d: save the DESCRIPTIONs of the MIB objects
e: disable errors when MIB symbols conflict
w: enable warnings when MIB symbols conflict
W: enable detailed warnings when MIB symbols conflict
R: replace MIB symbols from latest module
-O OUTOPTS Toggle various defaults controlling output display:
0: print leading 0 for single-digit hex characters
a: print all strings in ascii format
b: do not break OID indexes down
e: print enums numerically
E: escape quotes in string indices
f: print full OIDs on output
n: print OIDs numerically
p PRECISION: display floating point values with specified PRECISION (printf format string)
q: quick print for easier parsing
Q: quick print with equal-signs
s: print only last symbolic element of OID
S: print MIB module-id plus last element
t: print timeticks unparsed as numeric integers
T: print human-readable text along with hex strings
u: print OIDs using UCD-style prefix suppression
U: don't print units
v: print values only (not OID = value)
x: print all strings in hex format
X: extended index format
-I INOPTS Toggle various defaults controlling input parsing:
b: do best/regex matching to find a MIB node
h: don't apply DISPLAY-HINTs
r: do not check values for range/type legality
R: do random access to OID labels
u: top-level OIDs must have '.' prefix (UCD-style)
s SUFFIX: Append all textual OIDs with SUFFIX before parsing
S PREFIX: Prepend all textual OIDs with PREFIX before parsing
-L LOGOPTS Toggle various defaults controlling logging:
e: log to standard error
o: log to standard output
n: don't log at all
f file: log to the specified file
s facility: log to syslog (via the specified facility)
(variants)
[EON] pri: log to standard error, output or /dev/null for level 'pri' and above
[EON] p1-p2: log to standard error, output or /dev/null for levels 'p1' to 'p2'
[FS] pri token: log to file/syslog for level 'pri' and above
[FS] p1-p2 token: log to file/syslog for levels 'p1' to 'p2'
-C APPOPTS Set various application specific behaviours:
p: print the number of variables found
i: include given OID in the search range
I: don't include the given OID, even if no results are returned
c: do not check returned OIDs are increasing
t: Display wall-clock time to complete the walk
T: Display wall-clock time to complete each request
E {OID}: End the walk at the specified OID
man 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] 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. Some‐
times, 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 re‐
turn 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).
V5.9.3 28 May 2007 SNMPWALK(1)
