x SuSE Linux 13.1-RELEASE x
x SuSE Linux 13.1-RELEASEx
SNMPCMD(1) Net-SNMP SNMPCMD(1)
NAME
snmpcmd - options and behaviour common to most of the Net-SNMP command-
line tools
SYNOPSIS
snmpcmd [OPTIONS] AGENT [PARAMETERS]
DESCRIPTION
This manual page describes the common options for the SNMP commands:
snmpbulkget, snmpbulkwalk, snmpdelta, snmpget, snmpgetnext, snmpnet-
stat, snmpset, snmpstatus, snmptable, snmptest, snmptrap, snmpdf, snm-
pusm , snmpwalk . The command line applications use the SNMP protocol
to communicate with an SNMP capable network entity, an agent. Individ-
ual applications typically (but not necessarily) take additional param-
eters that are given after the agent specification. These parameters
are documented in the manual pages for each application.
COMMAND-LINE CONFIG OPTIONS
In addition to the options described in this manual page, all of the
tokens described in the snmp.conf and other .conf manual pages can be
used on the command line of Net-SNMP applications as well by prefixing
them with "--". EG, specifying --dontLoadHostConfig=true on the com-
mand line will turn off loading of the host specific configuration
files.
The snmp.conf file settings and the double-dash arguments over-ride the
single-dash arguments. So it's important to note that if single-dash
arguments aren't working because you have settings in the snmp.conf
file that conflict with them then you'll need to use the longer-form
double-dash arguments to successfully trump the snmp.conf file set-
tings.
Generic Options
These options control how the Net-SNMP commands behave regardless of
what version of SNMP you are using. See further below for options that
control specific versions or sub-modules of the SNMP protocol.
-d Dump (in hexadecimal) the raw SNMP packets sent and received.
-D[TOKEN[,...]]
Turn on debugging output for the given TOKEN(s). Try ALL for
extremely verbose output.
-h, --help
Display a brief usage message and then exit.
-H Display a list of configuration file directives understood by
the command and then exit.
-I [brRhu]
Specifies input parsing options. See INPUT OPTIONS below.
-L [eEfFoOsS]
Specifies output logging options. See LOGGING OPTIONS below.
-m MIBLIST
Specifies a colon separated list of MIB modules (not files) to
load for this application. This overrides (or augments) the en-
vironment variable MIBS, the snmp.conf directive mibs, and the
list of MIBs hardcoded into the Net-SNMP library.
If MIBLIST has a leading '-' or '+' character, then the MIB mod-
ules listed are loaded in addition to the default list, coming
before or after this list respectively. Otherwise, the speci-
fied MIBs are loaded instead of this default list.
The special keyword ALL is used to load all MIB modules in the
MIB directory search list. Every file whose name does not begin
with "." will be parsed as if it were a MIB file.
-M DIRLIST
Specifies a colon separated list of directories to search for
MIBs. This overrides (or augments) the environment variable
MIBDIRS, the snmp.conf directive mibdirs, and the default direc-
tory hardcoded into the Net-SNMP library (/usr/share/snmp/mibs).
If DIRLIST has a leading '-' or '+' character, then the given
directories are added to the default list, being searched before
or after the directories on this list respectively. Otherwise,
the specified directories are searched instead of this default
list.
Note that the directories appearing later in the list have have
precedence over earlier ones. To avoid searching any MIB direc-
tories, set the MIBDIRS environment variable to the empty string
("").
Note that MIBs specified using the -m option or the mibs config-
uration directive will be loaded from one of the directories
listed by the -M option (or equivalents). The mibfile directive
takes a full path to the specified MIB file, so this does not
need to be in the MIB directory search list.
-v 1 | 2c | 3
Specifies the protocol version to use: 1 (RFCs 1155-1157), 2c
(RFCs 1901-1908), or 3 (RFCs 2571-2574). The default is typi-
cally version 3. Overrides the defVersion token in the
snmp.conf file. -O [abeEfnqQsStTuUvxX] Specifies output print-
ing options. See OUTPUT OPTIONS below.
-P [cdeRuwW]
Specifies MIB parsing options. See MIB PARSING OPTIONS below.
-r retries
Specifies the number of retries to be used in the requests. The
default is 5.
-t timeout
Specifies the timeout in seconds between retries. The default is
1. Floating point numbers can be used to specify fractions of
seconds.
-V, --version
Display version information for the application and then exit.
-Yname="value"
--name="value"
Allows one to specify any token ("name") supported in the
snmp.conf file and sets its value to "value". Overrides the cor-
responding token in the snmp.conf file. See snmp.conf(5) for the
full list of tokens.
SNMPv3 Options
The following options are generic to all forms of SNMPv3, regardless of
whether it's the original SNMPv3 with USM or the newer SNMPv3 over
(D)TLS support.
-l secLevel
Set the securityLevel used for SNMPv3 messages (noAuthNoPriv|au-
thNoPriv|authPriv). Appropriate pass phrase(s) must provided
when using any level higher than noAuthNoPriv. Overrides the
defSecurityLevel token in the snmp.conf file.
-n contextName
Set the contextName used for SNMPv3 messages. The default con-
textName is the empty string "". Overrides the defContext token
in the snmp.conf file.
SNMPv3 over TLS Options
These options pass transport-specific parameters to the TLS layer. If
you're using SNMP over TLS or DTLS you'll need to pass a combination of
these either through these command line options or through snmp.conf
configuration tokens.
A note about <certificate-specifier>s : Net-SNMP looks for X.509 cer-
tificates in each of the normal SNMP configuration directory search
paths under a "tls" subdirectory. IE, it will look in ~/.snmp/tls and
in /usr/local/share/snmp/tls for certificates. The certificate compo-
nents (eg, the public and private halves) are stored in sub-directories
underneath this root set of directories. See the net-snmp-cert tool
for help in importing, creating and managing Net-SNMP certificates.
<certificate-specifier>s can reference either a fingerprint of the cer-
tificate to use (the net-snmp-cert tool can help you figure out the
certificates) or the filename's prefix can be used. For example, if
you had a "snmpd.crt" certificate file then you could simply refer to
the certificate via the "snmpd" specifier.
-T localCert=<certificate-specifier>
Indicates to the transport which key should be used to initiate
(D)TLS client connections. This would typically be a certifi-
cate found using the certificate fingerprint, the application
name (eg snmpd, snmptrapd, perl, python) or genericized name
"snmpapp" if using one of the generic applications (snmpget, sn-
mpwalk, etc). This can also be set using the localCert speci-
fier in a snmp.conf configuration file.
-T peerCert=<certificate-specifier>
If you expect a particular certificate to be presented by the
other side then you can use this specifier to indicate the cer-
tificate it should present. If it fails to present the expected
certificate the client will refuse to open the connection (be-
cause doing otherwise could lead to man-in-the-middle attacks).
This can also be set using the peerCert specifier in a snmp.conf
configuration file.
-T trust_cert=<certificate-specifier>
If you have a trusted CA certificate you wish to anchor trust
with, you can use this flag to load a given certificate as a
trust anchor. A copy of the certificate must exist within the
Net-SNMP certificate storage system or this must point to a com-
plete path name. Also see the "trustCert" snmp.conf configura-
tion token.
-T their_hostname=<name>
If the server's presented certificate can be validating using a
trust anchor then their hostname will be checked to ensure their
presented hostname matches one that is expected (you don't want
to connect to goodhost.example.com and accept a certificate pre-
sented by badhost.example.com do you?). This token can specify
the exact host name expected to be presented by the remote side,
either in a subjectAltName field or in the CommonName field of
the server's X.509 certificate.
SNMPv3 with USM Options
These options are specific to using SNMPv3 with the original User-based
Security Model (USM).
-3[MmKk] 0xHEXKEY
Sets the keys to be used for SNMPv3 transactions. These options
allow you to set the master authentication and encryption keys
(-3m and -3M respectively) or set the localized authentication
and encryption keys (-3k and -3K respectively). SNMPv3 keys can
be either passed in by hand using these flags, or by the use of
keys generated from passwords using the -A and -X flags dis-
cussed below. For further details on SNMPv3 and its usage of
keying information, see the Net-SNMP tutorial web site (
http://www.Net-SNMP.org/tutorial-5/commands/ ). Overrides the
defAuthMasterKey (-3m), defPrivMasterKey (-3M), defAuthLocal-
izedKey (-3k) or defPrivLocalizedKey (-3K) tokens, respectively,
in the snmp.conf file, see snmp.conf(5).
-a authProtocol
Set the authentication protocol
(MD5|SHA|SHA-512|SHA-384|SHA-256|SHA-224) used for authenticated
SNMPv3 messages. Overrides the defAuthType token in the
snmp.conf file.
-A authPassword
Set the authentication pass phrase used for authenticated SNMPv3
messages. Overrides the defAuthPassphrase token in the
snmp.conf file. It is insecure to specify pass phrases on the
command line, see snmp.conf(5).
-e engineID
Set the authoritative (security) engineID used for SNMPv3 RE-
QUEST messages, given as a hexadecimal string (optionally pre-
fixed by "0x"). It is typically not necessary to specify this
engine ID, as it will usually be discovered automatically.
-E engineID
Set the context engineID used for SNMPv3 REQUEST messages scope-
dPdu, given as a hexadecimal string. If not specified, this
will default to the authoritative engineID.
-u secName
Set the securityName used for authenticated SNMPv3 messages.
Overrides the defSecurityName token in the snmp.conf file.
-x privProtocol
Set the privacy protocol (DES or AES) used for encrypted SNMPv3
messages. Overrides the defPrivType token in the snmp.conf
file. This option is only valid if the Net-SNMP software was
build to use OpenSSL.
-X privPassword
Set the privacy pass phrase used for encrypted SNMPv3 messages.
Overrides the defPrivPassphrase token in the snmp.conf file. It
is insecure to specify pass phrases on the command line, see
snmp.conf(5).
-Z boots,time
Set the engineBoots and engineTime used for authenticated SNMPv3
messages. This will initialize the local notion of the agents
boots/time with an authenticated value stored in the LCD. It is
typically not necessary to specify this option, as these values
will usually be discovered automatically.
SNMPv1 and SNMPv2c Options
-c community
Set the community string for SNMPv1/v2c transactions. Overrides
the defCommunity token in the snmp.conf file.
AGENT SPECIFICATION
The string AGENT in the SYNOPSIS above specifies the remote SNMP entity
with which to communicate. This specification takes the form:
[<transport-specifier>:]<transport-address>
At its simplest, the AGENT specification may consist of a hostname, or
an IPv4 address in the standard "dotted quad" notation. In this case,
communication will be attempted using UDP/IPv4 to port 161 of the given
host. Otherwise, the <transport-address> part of the specification is
parsed according to the following table:
<transport-specifier> <transport-address> format
udp hostname[:port] or IPv4-address[:port]
tcp hostname[:port] or IPv4-address[:port]
unix pathname
ipx [network]:node[/port]
aal5pvc or pvc [interface.][VPI.]VCI
udp6 or udpv6 or udpipv6 hostname[:port] or IPv6-address:port or
'['IPv6-address']'[:port]
tcp6 or tcpv6 or tcpipv6 hostname[:port] or IPv6-address:port or
'['IPv6-address']'[:port]
Note that <transport-specifier> strings are case-insensitive so that,
for example, "tcp" and "TCP" are equivalent. Here are some examples,
along with their interpretation:
hostname:161 perform query using UDP/IPv4 datagrams to host-
name on port 161. The ":161" is redundant here
since that is the default SNMP port in any
case.
udp:hostname identical to the previous specification. The
"udp:" is redundant here since UDP/IPv4 is the
default transport.
TCP:hostname:1161 connect to hostname on port 1161 using TCP/IPv4
and perform query over that connection.
udp6:hostname:10161 perform the query using
UDP/IPv6 datagrams to port 10161 on hostname
(which will be looked up as an AAAA record).
UDP6:[fe80::2d0:b7ff:fe21:c6c0]
perform the query using UDP/IPv6 datagrams to
port 161 at address fe80::2d0:b7ff:fe21:c6c0.
tcpipv6:[::1]:1611 connect to port 1611 on the local host (::1 in
IPv6 parlance) using TCP/IPv6 and perform query
over that connection.
tls:hostname:10161
dtls:hostname:10161 Connects using SNMP over DTLS or TLS as docu-
mented by the ISMS working group (RFCs not yet
published as of this date). This will require
(and automatically ensures) that the TSM secu-
rity model is in use. You'll also need to set
up trust paths for the certificates presented
by the server (see above for descriptions of
this).
ssh:hostname:22 Connects using SNMP over SSH as documented by
the ISMS working group (RFCs not yet published
as of this date). This will require that the
TSM security model is in use (--defSecurity-
Model=tsm).
ipx::00D0B7AAE308 perform query using IPX datagrams to node num-
ber 00D0B7AAE308 on the default network, and
using the default IPX port of 36879 (900F hexa-
decimal), as suggested in RFC 1906.
ipx:0AE43409:00D0B721C6C0/1161
perform query using IPX datagrams to port 1161
on node number 00D0B721C6C0 on network number
0AE43409.
unix:/tmp/local-agent connect to the Unix domain socket /tmp/lo-
cal-agent, and perform the query over that con-
nection.
/tmp/local-agent identical to the previous specification, since
the Unix domain is the default transport iff
the first character of the <transport-address>
is a '/'.
alias:myname perform a connection to the myname alias which
needs to be defined in the snmp.conf file using
a line like " alias myname udp:127.0.0.1:9161
". Any type of transport definition can be
used as the alias expansion parameter. Aliases
are particularly useful for using repeated com-
plex transport strings.
AAL5PVC:100 perform the query using AAL5 PDUs sent on the
permanent virtual circuit with VPI=0 and
VCI=100 (decimal) on the first ATM adapter in
the machine.
PVC:1.10.32 perform the query using AAL5 PDUs sent on the
permanent virtual circuit with VPI=10 (decimal)
and VCI=32 (decimal) on the second ATM adapter
in the machine. Note that "PVC" is a synonym
for "AAL5PVC".
Note that not all the transport domains listed above will always be
available; for instance, hosts with no IPv6 support will not be able to
use udp6 transport addresses, and attempts to do so will result in the
error "Unknown host". Likewise, since AAL5 PVC support is only cur-
rently available on Linux, it will fail with the same error on other
platforms.
MIB PARSING OPTIONS
The Net-SNMP MIB parser mostly adheres to the Structure of Management
Information (SMI). As that specification has changed through time, and
in recognition of the (ahem) diversity in compliance expressed in MIB
files, additional options provide more flexibility in reading MIB
files.
-Pc Toggles whether ASN.1 comments should extend to the end of the
MIB source line. Strictly speaking, a second appearance of "--"
should terminate the comment, but this breaks some MIB files.
The default behaviour (to interpret comments correctly) can also
be set with the configuration token commentToEOL.
-Pd Disables the loading of MIB object DESCRIPTIONs when parsing MIB
files. This reduces the amount of memory used by the running
application.
-Pe Toggles whether to show errors encountered when parsing MIB
files. These include references to IMPORTed modules and MIB ob-
jects that cannot be located in the MIB directory search list.
The default behaviour can also be set with the configuration to-
ken showMibErrors.
-PR If the same MIB object (parent name and sub-identifier) appears
multiple times in the list of MIB definitions loaded, use the
last version to be read in. By default, the first version will
be used, and any duplicates discarded. This behaviour can also
be set with the configuration token mibReplaceWithLatest.
Such ordering is normally only relevant if there are two MIB
files with conflicting object definitions for the same OID (or
different revisions of the same basic MIB object).
-Pu Toggles whether to allow the underline character in MIB object
names and other symbols. Strictly speaking, this is not valid
SMI syntax, but some vendor MIB files define such names. The
default behaviour can also be set with the configuration token
mibAllowUnderline.
-Pw Show various warning messages in parsing MIB files and building
the overall OID tree. This can also be set with the configura-
tion directive mibWarningLevel 1
-PW Show some additional warning messages, mostly relating to pars-
ing individual MIB objects. This can also be set with the con-
figuration directive mibWarningLevel 2
OUTPUT OPTIONS
The format of the output from SNMP commands can be controlled using
various parameters of the -O flag. The effects of these sub-options
can be seen by comparison with the following default output (unless
otherwise specified):
$ snmpget -c public -v 1 localhost sysUpTime.0
SNMPv2-MIB::sysUpTime.0 = Timeticks: (14096763) 1 day, 15:09:27.63
-Oa Display string values as ASCII strings (unless there is a DIS-
PLAY-HINT defined for the corresponding MIB object). By de-
fault, the library attempts to determine whether the value is a
printable or binary string, and displays it accordingly.
This option does not affect objects that do have a Display Hint.
-Ob Display table indexes numerically, rather than trying to inter-
pret the instance subidentifiers as string or OID values:
$ snmpgetnext -c public -v 1 localhost vacmSecurityModel
SNMP-VIEW-BASED-ACM-MIB::vacmSecurityModel.0."wes" = xxx
$ snmpgetnext -c public -v 1 -Ob localhost vacmSecurityModel
SNMP-VIEW-BASED-ACM-MIB::vacmSecurityModel.0.3.119.101.115 = xxx
-Oe Removes the symbolic labels from enumeration values:
$ snmpget -c public -v 1 localhost ipForwarding.0
IP-MIB::ipForwarding.0 = INTEGER: forwarding(1)
$ snmpget -c public -v 1 -Oe localhost ipForwarding.0
IP-MIB::ipForwarding.0 = INTEGER: 1
-OE Modifies index strings to escape the quote characters:
$ snmpgetnext -c public -v 1 localhost vacmSecurityModel
SNMP-VIEW-BASED-ACM-MIB::vacmSecurityModel.0."wes" = xxx
$ snmpgetnext -c public -v 1 -OE localhost vacmSecurityModel
SNMP-VIEW-BASED-ACM-MIB::vacmSecurityModel.0.\"wes\" = xxx
This allows the output to be reused in shell commands.
-Of Include the full list of MIB objects when displaying an OID:
.iso.org.dod.internet.mgmt.mib-2.system.sysUpTime.0 =
Timeticks: (14096763) 1 day, 15:09:27.63
-On Displays the OID numerically:
.1.3.6.1.2.1.1.3.0 = Timeticks: (14096763) 1 day,
15:09:27.63
-Op PRECISION
Uses the PRECISION string to allow modification of the value
output format. This is used with OPAQUE float/double at the mo-
ment, but might be usabe for other types in the future. Allowed
PRECISION strings are compatible to the flag/field with/preci-
sion part of the printf(3) function:
$ snmpget localhost outputVoltage.1
WIENER-CRATE-MIB::outputVoltage.u0 = Opaque: Float: 0.000000
V
$ snmpget -Op +020.12 localhost outputVoltage.1
WIENER-CRATE-MIB::outputVoltage.u0 = Opaque: Float:
+000000.000000000000 V
-Oq Removes the equal sign and type information when displaying
varbind values:
SNMPv2-MIB::sysUpTime.0 1:15:09:27.63
-OQ Removes the type information when displaying varbind values:
SNMPv2-MIB::sysUpTime.0 = 1:15:09:27.63
-Os Display the MIB object name (plus any instance or other subiden-
tifiers):
sysUpTime.0 = Timeticks: (14096763) 1 day, 15:09:27.63
-OS Display the name of the MIB, as well as the object name:
SNMPv2-MIB::sysUpTime.0 = Timeticks: (14096763) 1 day,
15:09:27.63
This is the default OID output format.
-Ot Display TimeTicks values as raw numbers:
SNMPv2-MIB::sysUpTime.0 = 14096763
-OT If values are printed as Hex strings, display a printable ver-
sion as well.
-Ou Display the OID in the traditional UCD-style (inherited from the
original CMU code). That means removing a series of "standard"
prefixes from the OID, and displaying the remaining list of MIB
object names (plus any other subidentifiers):
system.sysUpTime.0 = Timeticks: (14096763) 1 day,
15:09:27.63
-OU Do not print the UNITS suffix at the end of the value.
-Ov Display the varbind value only, not the OID:
$ snmpget -c public -v 1 -Ov localhost ipForwarding.0
INTEGER: forwarding(1)
-Ox Display string values as Hex strings (unless there is a DIS-
PLAY-HINT defined for the corresponding MIB object). By de-
fault, the library attempts to determine whether the value is a
printable or binary string, and displays it accordingly.
This option does not affect objects that do have a Display Hint.
-OX Display table indexes in a more "program like" output, imitating
a traditional array-style index format:
$ snmpgetnext -c public -v 1 localhost ipv6RouteTable
IPv6-MIB::ipv6RouteIfIndex.63.254.1.0.255.0.0.0.0.0.0.0.0.0.0.0.64.1 = INTEGER: 2
$ snmpgetnext -c public -v 1 -OX localhost ipv6RouteTable
IPv6-MIB::ipv6RouteIfIndex[3ffe:100:ff00:0:0:0:0:0][64][1] = INTEGER: 2
Most of these options can also be configured via configuration tokens.
See the snmp.conf(5) manual page for details.
LOGGING OPTIONS
The mechanism and destination to use for logging of warning and error
messages can be controlled by passing various parameters to the -L
flag.
-Ln Disable all logging.
-Le Log messages to the standard error stream.
-Lf FILE
Log messages to the specified file.
-Lo Log messages to the standard output stream.
-Ls FACILITY
Log messages via syslog, using the specified facility ('d' for
LOG_DAEMON, 'u' for LOG_USER, or '0'-'7' for LOG_LOCAL0 through
LOG_LOCAL7).
There are also "upper case" versions of each of these options, which
allow the corresponding logging mechanism to be restricted to certain
priorities of message. Using standard error logging as an example:
-LE pri
will log messages of priority 'pri' and above to standard error.
See below for possible 'pri' values-
-LE pri1-pri2
will log messages with priority between 'pri1' and 'pri2' (in-
clusive) to standard error.
For -LF and -LS the priority specification comes before the file or fa-
cility token.
The priorities recognised are:
0 or ! for LOG_EMERG,
1 or a for LOG_ALERT,
2 or c for LOG_CRIT,
3 or e for LOG_ERR,
4 or w for LOG_WARNING,
5 or n for LOG_NOTICE,
6 or i for LOG_INFO, and
7 or d for LOG_DEBUG.
Normal output is (or will be!) logged at a priority level of LOG_NOTICE
INPUT OPTIONS
The interpretation of input object names and the values to be assigned
can be controlled using various parameters of the -I flag. The default
behaviour will be described at the end of this section.
-Ib specifies that the given name should be regarded as a regular
expression, to match (case-insensitively) against object names
in the MIB tree. The "best" match will be used - calculated as
the one that matches the closest to the beginning of the node
name and the highest in the tree. For example, the MIB object
vacmSecurityModel could be matched by the expression vacmsecuri-
tymodel (full name, but different case), or vacm.*model (regexp
pattern).
Note that '.' is a special character in regular expression pat-
terns, so the expression cannot specify instance subidentifiers
or more than one object name. A "best match" expression will
only be applied against single MIB object names. For example,
the expression sys*ontact.0 would not match the instance sysCon-
tact.0 (although sys*ontact would match sysContact). Similarly,
specifying a MIB module name will not succeed (so SN-
MPv2-MIB::sys.*ontact would not match either).
-Ih disables the use of DISPLAY-HINT information when assigning val-
ues. This would then require providing the raw value:
snmpset ... HOST-RESOURCES-MIB::hrSystemDate.0
x "07 D2 0C 0A 02 04 06 08"
instead of a formatted version:
snmpset ... HOST-RESOURCES-MIB::hrSystemDate.0
= 2002-12-10,2:4:6.8
-Ir disables checking table indexes and the value to be assigned
against the relevant MIB definitions. This will (hopefully) re-
sult in the remote agent reporting an invalid request, rather
than checking (and rejecting) this before it is sent to the re-
mote agent.
Local checks are more efficient (and the diagnostics provided
also tend to be more precise), but disabling this behaviour is
particularly useful when testing the remote agent.
-IR enables "random access" lookup of MIB names. Rather than pro-
viding a full OID path to the desired MIB object (or qualifying
this object with an explicit MIB module name), the MIB tree will
be searched for the matching object name. Thus .iso.org.dod.in-
ternet.mib-2.system.sysDescr.0 (or SNMPv2-MIB::sysDescr.0) can
be specified simply as sysDescr.0.
Warning:
Since MIB object names are not globally unique, this ap-
proach may return a different MIB object depending on
which MIB files have been loaded.
The MIB-MODULE::objectName syntax has the advantage of uniquely
identifying a particular MIB object, as well as being slightly
more efficient (and automatically loading the necessary MIB file
if necessary).
-Is SUFFIX
adds the specified suffix to each textual OID given on the com-
mand line. This can be used to retrieve multiple objects from
the same row of a table, by specifying a common index value.
-IS PREFIX
adds the specified prefix to each textual OID given on the com-
mand line. This can be used to specify an explicit MIB module
name for all objects being retrieved (or for incurably lazy typ-
ists).
-Iu enables the traditional UCD-style approach to interpreting input
OIDs. This assumes that OIDs are rooted at the 'mib-2' point in
the tree (unless they start with an explicit '.' or include a
MIB module name). So the sysDescr instance above would be ref-
erenced as system.sysDescr.0.
Object names specified with a leading '.' are always interpreted as
"fully qualified" OIDs, listing the sequence of MIB objects from the
root of the MIB tree. Such objects and those qualified by an explicit
MIB module name are unaffected by the -Ib, -IR and -Iu flags.
Otherwise, if none of the above input options are specified, the de-
fault behaviour for a "relative" OID is to try and interpret it as an
(implicitly) fully qualified OID, then apply "random access" lookup
(-IR), followed by "best match" pattern matching (-Ib).
ENVIRONMENT VARIABLES
PREFIX The standard prefix for object identifiers (when using UCD-style
output). Defaults to .iso.org.dod.internet.mgmt.mib-2
MIBS The list of MIBs to load. Defaults to
SNMPv2-TC:SNMPv2-MIB:IF-MIB:IP-MIB:TCP-MIB:UDP-MIB:
SNMP-VACM-MIB.
Overridden by the -m option.
MIBDIRS
The list of directories to search for MIBs. Defaults to
/usr/share/snmp/mibs. Overridden by the -M option.
FILES
/etc/snmp/snmpd.conf
Agent configuration file. See snmpd.conf(5).
/etc/snmp/snmp.conf
~/.snmp/snmp.conf
Application configuration files. See snmp.conf(5).
SEE ALSO
snmpget(1), snmpgetnext(1), snmpset(1), snmpbulkget(1), snmpbulk-
walk(1), snmpwalk(1), snmptable(1), snmpnetstat(1), snmpdelta(1), sn-
mptrap(1), snmpinform(1), snmpusm(1), snmpstatus(1), snmptest(1),
snmp.conf(5).
V5.9.4.pre2 20 Jul 2010 SNMPCMD(1)
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