1SNMPCMD(1)                         Net-SNMP                         SNMPCMD(1)
2
3
4

NAME

6       snmpcmd - options and behaviour common to most of the Net-SNMP command-
7       line tools
8

SYNOPSIS

10       snmpcmd [OPTIONS] AGENT [PARAMETERS]
11

DESCRIPTION

13       This manual page describes the common options for  the  SNMP  commands:
14       snmpbulkget,  snmpbulkwalk,  snmpdelta,  snmpget, snmpgetnext, snmpnet‐
15       stat, snmpset, snmpstatus, snmptable, snmptest, snmptrap,  snmpdf, snm‐
16       pusm  , snmpwalk .  The command line applications use the SNMP protocol
17       to communicate with an SNMP capable network entity, an agent.  Individ‐
18       ual applications typically (but not necessarily) take additional param‐
19       eters that are given after the agent specification.   These  parameters
20       are documented in the manual pages for each application.
21

COMMAND-LINE CONFIG OPTIONS

23       In  addition  to  the options described in this manual page, all of the
24       tokens described in the snmp.conf and other .conf manual pages  can  be
25       used  on the command line of Net-SNMP applications as well by prefixing
26       them with "--".  EG, specifying --dontLoadHostConfig=true on  the  com‐
27       mand  line  will  turn  off  loading of the host specific configuration
28       files.
29
30       The snmp.conf file settings and the double-dash arguments over-ride the
31       single-dash  arguments.   So it's important to note that if single-dash
32       arguments aren't working because you have  settings  in  the  snmp.conf
33       file  that  conflict  with them then you'll need to use the longer-form
34       double-dash arguments to successfully trump  the  snmp.conf  file  set‐
35       tings.
36

Generic Options

38       These  options  control  how the Net-SNMP commands behave regardless of
39       what version of SNMP you are using.  See further below for options that
40       control specific versions or sub-modules of the SNMP protocol.
41
42       -d     Dump (in hexadecimal) the raw SNMP packets sent and received.
43
44       -D[TOKEN[,...]]
45              Turn  on  debugging  output for the given TOKEN(s).  Try ALL for
46              extremely verbose output.
47
48
49       -h, --help
50              Display a brief usage message and then exit.
51
52       -H     Display a list of configuration file  directives  understood  by
53              the command and then exit.
54
55       -I [brRhu]
56              Specifies input parsing options. See INPUT OPTIONS below.
57
58       -L [eEfFoOsS]
59              Specifies output logging options. See LOGGING OPTIONS below.
60
61       -m MIBLIST
62              Specifies  a  colon separated list of MIB modules (not files) to
63              load for this application.  This overrides (or augments) the en‐
64              vironment  variable  MIBS, the snmp.conf directive mibs, and the
65              list of MIBs hardcoded into the Net-SNMP library.
66
67              If MIBLIST has a leading '-' or '+' character, then the MIB mod‐
68              ules  listed  are loaded in addition to the default list, coming
69              before or after this list respectively.  Otherwise,  the  speci‐
70              fied MIBs are loaded instead of this default list.
71
72              The  special  keyword ALL is used to load all MIB modules in the
73              MIB directory search list.  Every file whose name does not begin
74              with "." will be parsed as if it were a MIB file.
75
76       -M DIRLIST
77              Specifies  a  colon  separated list of directories to search for
78              MIBs.  This overrides (or  augments)  the  environment  variable
79              MIBDIRS, the snmp.conf directive mibdirs, and the default direc‐
80              tory hardcoded into the Net-SNMP library (/usr/share/snmp/mibs).
81
82              If DIRLIST has a leading '-' or '+' character,  then  the  given
83              directories are added to the default list, being searched before
84              or after the directories on this list respectively.   Otherwise,
85              the  specified  directories are searched instead of this default
86              list.
87
88              Note that the directories appearing later in the list have  have
89              precedence over earlier ones.  To avoid searching any MIB direc‐
90              tories, set the MIBDIRS environment variable to the empty string
91              ("").
92
93              Note that MIBs specified using the -m option or the mibs config‐
94              uration directive will be loaded from  one  of  the  directories
95              listed by the -M option (or equivalents).  The mibfile directive
96              takes a full path to the specified MIB file, so  this  does  not
97              need to be in the MIB directory search list.
98
99       -v 1 | 2c | 3
100              Specifies  the  protocol  version to use: 1 (RFCs 1155-1157), 2c
101              (RFCs 1901-1908), or 3 (RFCs 2571-2574).  The default  is  typi‐
102              cally   version  3.   Overrides  the  defVersion  token  in  the
103              snmp.conf file.  -O [abeEfnqQsStTuUvxX] Specifies output  print‐
104              ing options. See OUTPUT OPTIONS below.
105
106       -P [cdeRuwW]
107              Specifies MIB parsing options.  See MIB PARSING OPTIONS below.
108
109       -r retries
110              Specifies  the number of retries to be used in the requests. The
111              default is 5.
112
113       -t timeout
114              Specifies the timeout in seconds between retries. The default is
115              1.   Floating  point numbers can be used to specify fractions of
116              seconds.
117
118       -V, --version
119              Display version information for the application and then exit.
120
121       -Yname="value"
122
123       --name="value"
124              Allows one to  specify  any  token  ("name")  supported  in  the
125              snmp.conf file and sets its value to "value". Overrides the cor‐
126              responding token in the snmp.conf file. See snmp.conf(5) for the
127              full list of tokens.
128
129
130

SNMPv3 Options

132       The following options are generic to all forms of SNMPv3, regardless of
133       whether it's the original SNMPv3 with USM  or  the  newer  SNMPv3  over
134       (D)TLS support.
135
136
137       -l secLevel
138              Set the securityLevel used for SNMPv3 messages (noAuthNoPriv|au‐
139              thNoPriv|authPriv).  Appropriate pass  phrase(s)  must  provided
140              when  using  any  level higher than noAuthNoPriv.  Overrides the
141              defSecurityLevel token in the snmp.conf file.
142
143       -n contextName
144              Set the contextName used for SNMPv3 messages.  The default  con‐
145              textName is the empty string "".  Overrides the defContext token
146              in the snmp.conf file.
147
148

SNMPv3 over TLS Options

150       These options pass transport-specific parameters to the TLS layer.   If
151       you're using SNMP over TLS or DTLS you'll need to pass a combination of
152       these either through these command line options  or  through  snmp.conf
153       configuration tokens.
154
155       A  note  about <certificate-specifier>s : Net-SNMP looks for X.509 cer‐
156       tificates in each of the normal  SNMP  configuration  directory  search
157       paths  under a "tls" subdirectory.  IE, it will look in ~/.snmp/tls and
158       in /usr/local/share/snmp/tls for certificates.  The certificate  compo‐
159       nents (eg, the public and private halves) are stored in sub-directories
160       underneath this root set of directories.  See  the  net-snmp-cert  tool
161       for  help  in  importing,  creating and managing Net-SNMP certificates.
162       <certificate-specifier>s can reference either a fingerprint of the cer‐
163       tificate  to  use  (the  net-snmp-cert tool can help you figure out the
164       certificates) or the filename's prefix can be used.   For  example,  if
165       you  had  a "snmpd.crt" certificate file then you could simply refer to
166       the certificate via the "snmpd" specifier.
167
168       -T localCert=<certificate-specifier>
169              Indicates to the transport which key should be used to  initiate
170              (D)TLS  client  connections.  This would typically be a certifi‐
171              cate found using the certificate  fingerprint,  the  application
172              name  (eg  snmpd,  snmptrapd,  perl, python) or genericized name
173              "snmpapp" if using one of the generic applications (snmpget, sn‐
174              mpwalk,  etc).   This can also be set using the localCert speci‐
175              fier in a snmp.conf configuration file.
176
177       -T peerCert=<certificate-specifier>
178              If you expect a particular certificate to be  presented  by  the
179              other  side then you can use this specifier to indicate the cer‐
180              tificate it should present.  If it fails to present the expected
181              certificate  the  client will refuse to open the connection (be‐
182              cause doing otherwise could lead to man-in-the-middle  attacks).
183              This can also be set using the peerCert specifier in a snmp.conf
184              configuration file.
185
186       -T trust_cert=<certificate-specifier>
187              If you have a trusted CA certificate you wish  to  anchor  trust
188              with,  you  can  use  this flag to load a given certificate as a
189              trust anchor.  A copy of the certificate must exist  within  the
190              Net-SNMP certificate storage system or this must point to a com‐
191              plete path name.  Also see the "trustCert" snmp.conf  configura‐
192              tion token.
193
194       -T their_hostname=<name>
195              If  the server's presented certificate can be validating using a
196              trust anchor then their hostname will be checked to ensure their
197              presented  hostname matches one that is expected (you don't want
198              to connect to goodhost.example.com and accept a certificate pre‐
199              sented  by badhost.example.com do you?).  This token can specify
200              the exact host name expected to be presented by the remote side,
201              either  in  a subjectAltName field or in the CommonName field of
202              the server's X.509 certificate.
203

SNMPv3 with USM Options

205       These options are specific to using SNMPv3 with the original User-based
206       Security Model (USM).
207
208       -3[MmKk]  0xHEXKEY
209              Sets the keys to be used for SNMPv3 transactions.  These options
210              allow you to set the master authentication and  encryption  keys
211              (-3m  and  -3M respectively) or set the localized authentication
212              and encryption keys (-3k and -3K respectively).  SNMPv3 keys can
213              be  either passed in by hand using these flags, or by the use of
214              keys generated from passwords using the -A  and  -X  flags  dis‐
215              cussed  below.   For  further details on SNMPv3 and its usage of
216              keying  information,  see  the  Net-SNMP  tutorial  web  site  (
217              http://www.Net-SNMP.org/tutorial-5/commands/  ).   Overrides the
218              defAuthMasterKey (-3m),  defPrivMasterKey  (-3M),  defAuthLocal‐
219              izedKey (-3k) or defPrivLocalizedKey (-3K) tokens, respectively,
220              in the snmp.conf file, see snmp.conf(5).
221
222       -a authProtocol
223              Set            the            authentication            protocol
224              (MD5|SHA|SHA-512|SHA-384|SHA-256|SHA-224) used for authenticated
225              SNMPv3  messages.  Overrides  the  defAuthType  token   in   the
226              snmp.conf file.
227
228       -A authPassword
229              Set the authentication pass phrase used for authenticated SNMPv3
230              messages.   Overrides  the  defAuthPassphrase   token   in   the
231              snmp.conf  file.  It  is insecure to specify pass phrases on the
232              command line, see snmp.conf(5).
233
234       -e engineID
235              Set the authoritative (security) engineID used  for  SNMPv3  RE‐
236              QUEST  messages,  given as a hexadecimal string (optionally pre‐
237              fixed by "0x").  It is typically not necessary to  specify  this
238              engine ID, as it will usually be discovered automatically.
239
240       -E engineID
241              Set the context engineID used for SNMPv3 REQUEST messages scope‐
242              dPdu, given as a hexadecimal string.   If  not  specified,  this
243              will default to the authoritative engineID.
244
245       -u secName
246              Set  the  securityName  used  for authenticated SNMPv3 messages.
247              Overrides the defSecurityName token in the snmp.conf file.
248
249       -x privProtocol
250              Set the privacy protocol (AES) used for  encrypted  SNMPv3  mes‐
251              sages.   Overrides  the defPrivType token in the snmp.conf file.
252              This option is only valid if the Net-SNMP software was build  to
253              use OpenSSL.
254
255       -X privPassword
256              Set  the privacy pass phrase used for encrypted SNMPv3 messages.
257              Overrides the defPrivPassphrase token in the snmp.conf file.  It
258              is  insecure  to  specify  pass phrases on the command line, see
259              snmp.conf(5).
260
261       -Z boots,time
262              Set the engineBoots and engineTime used for authenticated SNMPv3
263              messages.   This  will initialize the local notion of the agents
264              boots/time with an authenticated value stored in the LCD.  It is
265              typically  not necessary to specify this option, as these values
266              will usually be discovered automatically.
267
268
269

SNMPv1 and SNMPv2c Options

271       -c community
272              Set the community string for SNMPv1/v2c transactions.  Overrides
273              the defCommunity token in the snmp.conf file.
274
275

AGENT SPECIFICATION

277       The string AGENT in the SYNOPSIS above specifies the remote SNMP entity
278       with which to communicate.  This specification takes the form:
279
280              [<transport-specifier>:]<transport-address>
281
282       At its simplest, the AGENT specification may consist of a hostname,  or
283       an  IPv4 address in the standard "dotted quad" notation.  In this case,
284       communication will be attempted using UDP/IPv4 to port 161 of the given
285       host.   Otherwise, the <transport-address> part of the specification is
286       parsed according to the following table:
287
288           <transport-specifier>       <transport-address> format
289
290           udp                         hostname[:port] or IPv4-address[:port]
291
292           tcp                         hostname[:port] or IPv4-address[:port]
293
294           unix                        pathname
295
296           ipx                         [network]:node[/port]
297
298           aal5pvc or pvc              [interface.][VPI.]VCI
299
300           udp6 or udpv6 or udpipv6    hostname[:port] or IPv6-address:port or
301                                        '['IPv6-address']'[:port]
302
303           tcp6 or tcpv6 or tcpipv6    hostname[:port] or IPv6-address:port or
304                                        '['IPv6-address']'[:port]
305
306       Note that <transport-specifier> strings are case-insensitive  so  that,
307       for  example,  "tcp" and "TCP" are equivalent.  Here are some examples,
308       along with their interpretation:
309
310       hostname:161            perform query using UDP/IPv4 datagrams to host‐
311                               name on port 161.  The ":161" is redundant here
312                               since that is the  default  SNMP  port  in  any
313                               case.
314
315       udp:hostname            identical  to  the previous specification.  The
316                               "udp:" is redundant here since UDP/IPv4 is  the
317                               default transport.
318
319       TCP:hostname:1161       connect to hostname on port 1161 using TCP/IPv4
320                               and  perform  query   over   that   connection.
321                               udp6:hostname:10161  perform  the  query  using
322                               UDP/IPv6 datagrams to port  10161  on  hostname
323                               (which will be looked up as an AAAA record).
324
325       UDP6:[fe80::2d0:b7ff:fe21:c6c0]
326                               perform  the  query using UDP/IPv6 datagrams to
327                               port 161 at address fe80::2d0:b7ff:fe21:c6c0.
328
329       tcpipv6:[::1]:1611      connect to port 1611 on the local host (::1  in
330                               IPv6 parlance) using TCP/IPv6 and perform query
331                               over that connection.
332
333       tls:hostname:10161
334
335       dtls:hostname:10161     Connects using SNMP over DTLS or TLS  as  docu‐
336                               mented  by the ISMS working group (RFCs not yet
337                               published as of this date).  This will  require
338                               (and  automatically ensures) that the TSM secu‐
339                               rity model is in use.  You'll also need to  set
340                               up  trust  paths for the certificates presented
341                               by the server (see above  for  descriptions  of
342                               this).
343
344       ssh:hostname:22         Connects  using  SNMP over SSH as documented by
345                               the ISMS working group (RFCs not yet  published
346                               as  of  this date).  This will require that the
347                               TSM security model is  in  use  (--defSecurity‐
348                               Model=tsm).
349
350       ipx::00D0B7AAE308       perform  query using IPX datagrams to node num‐
351                               ber 00D0B7AAE308 on the  default  network,  and
352                               using the default IPX port of 36879 (900F hexa‐
353                               decimal), as suggested in RFC 1906.
354
355       ipx:0AE43409:00D0B721C6C0/1161
356                               perform query using IPX datagrams to port  1161
357                               on  node  number 00D0B721C6C0 on network number
358                               0AE43409.
359
360       unix:/tmp/local-agent   connect to  the  Unix  domain  socket  /tmp/lo‐
361                               cal-agent, and perform the query over that con‐
362                               nection.
363
364       /tmp/local-agent        identical to the previous specification,  since
365                               the  Unix  domain  is the default transport iff
366                               the first character of the  <transport-address>
367                               is a '/'.
368
369       alias:myname            perform  a connection to the myname alias which
370                               needs to be defined in the snmp.conf file using
371                               a  line  like " alias myname udp:127.0.0.1:9161
372                               ".  Any type of  transport  definition  can  be
373                               used as the alias expansion parameter.  Aliases
374                               are particularly useful for using repeated com‐
375                               plex transport strings.
376
377       AAL5PVC:100             perform  the  query using AAL5 PDUs sent on the
378                               permanent  virtual  circuit  with   VPI=0   and
379                               VCI=100  (decimal)  on the first ATM adapter in
380                               the machine.
381
382       PVC:1.10.32             perform the query using AAL5 PDUs sent  on  the
383                               permanent virtual circuit with VPI=10 (decimal)
384                               and VCI=32 (decimal) on the second ATM  adapter
385                               in  the  machine.  Note that "PVC" is a synonym
386                               for "AAL5PVC".
387
388       Note that not all the transport domains listed  above  will  always  be
389       available; for instance, hosts with no IPv6 support will not be able to
390       use udp6 transport addresses, and attempts to do so will result in  the
391       error  "Unknown  host".   Likewise, since AAL5 PVC support is only cur‐
392       rently available on Linux, it will fail with the same  error  on  other
393       platforms.
394

MIB PARSING OPTIONS

396       The  Net-SNMP  MIB parser mostly adheres to the Structure of Management
397       Information (SMI).  As that specification has changed through time, and
398       in  recognition  of the (ahem) diversity in compliance expressed in MIB
399       files, additional options  provide  more  flexibility  in  reading  MIB
400       files.
401
402       -Pc    Toggles  whether  ASN.1 comments should extend to the end of the
403              MIB source line.  Strictly speaking, a second appearance of "--"
404              should  terminate  the  comment, but this breaks some MIB files.
405              The default behaviour (to interpret comments correctly) can also
406              be set with the configuration token commentToEOL.
407
408       -Pd    Disables the loading of MIB object DESCRIPTIONs when parsing MIB
409              files.  This reduces the amount of memory used  by  the  running
410              application.
411
412       -Pe    Toggles  whether  to  show  errors  encountered when parsing MIB
413              files.  These include references to IMPORTed modules and MIB ob‐
414              jects  that  cannot be located in the MIB directory search list.
415              The default behaviour can also be set with the configuration to‐
416              ken showMibErrors.
417
418       -PR    If  the same MIB object (parent name and sub-identifier) appears
419              multiple times in the list of MIB definitions  loaded,  use  the
420              last  version to be read in.  By default, the first version will
421              be used, and any duplicates discarded.  This behaviour can  also
422              be set with the configuration token mibReplaceWithLatest.
423
424              Such  ordering  is  normally  only relevant if there are two MIB
425              files with conflicting object definitions for the same  OID  (or
426              different revisions of the same basic MIB object).
427
428       -Pu    Toggles  whether  to allow the underline character in MIB object
429              names and other symbols.  Strictly speaking, this is  not  valid
430              SMI  syntax,  but  some vendor MIB files define such names.  The
431              default behaviour can also be set with the  configuration  token
432              mibAllowUnderline.
433
434       -Pw    Show  various warning messages in parsing MIB files and building
435              the overall OID tree.  This can also be set with the  configura‐
436              tion directive mibWarningLevel 1
437
438       -PW    Show  some additional warning messages, mostly relating to pars‐
439              ing individual MIB objects.  This can also be set with the  con‐
440              figuration directive mibWarningLevel 2
441
442

OUTPUT OPTIONS

444       The  format  of  the  output from SNMP commands can be controlled using
445       various parameters of the -O flag.  The effects  of  these  sub-options
446       can  be  seen  by  comparison with the following default output (unless
447       otherwise specified):
448              $ snmpget -c public -v 1 localhost sysUpTime.0
449              SNMPv2-MIB::sysUpTime.0 = Timeticks: (14096763) 1 day, 15:09:27.63
450
451
452       -Oa    Display string values as ASCII strings (unless there is  a  DIS‐
453              PLAY-HINT  defined  for  the  corresponding MIB object).  By de‐
454              fault, the library attempts to determine whether the value is  a
455              printable or binary string, and displays it accordingly.
456
457              This option does not affect objects that do have a Display Hint.
458
459       -Ob    Display  table indexes numerically, rather than trying to inter‐
460              pret the instance subidentifiers as string or OID values:
461                  $ snmpgetnext -c public -v 1 localhost vacmSecurityModel
462                  SNMP-VIEW-BASED-ACM-MIB::vacmSecurityModel.0."wes" = xxx
463                  $ snmpgetnext -c public -v 1 -Ob localhost vacmSecurityModel
464                  SNMP-VIEW-BASED-ACM-MIB::vacmSecurityModel.0.3.119.101.115 = xxx
465
466       -Oe    Removes the symbolic labels from enumeration values:
467                  $ snmpget -c public -v 1 localhost ipForwarding.0
468                  IP-MIB::ipForwarding.0 = INTEGER: forwarding(1)
469                  $ snmpget -c public -v 1 -Oe localhost ipForwarding.0
470                  IP-MIB::ipForwarding.0 = INTEGER: 1
471
472       -OE    Modifies index strings to escape the quote characters:
473                  $ snmpgetnext -c public -v 1 localhost vacmSecurityModel
474                  SNMP-VIEW-BASED-ACM-MIB::vacmSecurityModel.0."wes" = xxx
475                  $ snmpgetnext -c public -v 1 -OE localhost vacmSecurityModel
476                  SNMP-VIEW-BASED-ACM-MIB::vacmSecurityModel.0.\"wes\" = xxx
477
478              This allows the output to be reused in shell commands.
479
480       -Of    Include the full list of MIB objects when displaying an OID:
481                  .iso.org.dod.internet.mgmt.mib-2.system.sysUpTime.0 =
482                             Timeticks: (14096763) 1 day, 15:09:27.63
483
484       -On    Displays the OID numerically:
485                  .1.3.6.1.2.1.1.3.0   =   Timeticks:   (14096763)   1    day,
486              15:09:27.63
487
488       -Op PRECISION
489              Uses  the  PRECISION  string  to allow modification of the value
490              output format.  This is used with OPAQUE float/double at the mo‐
491              ment,  but might be usabe for other types in the future. Allowed
492              PRECISION strings are compatible to the  flag/field  with/preci‐
493              sion part of the printf(3) function:
494                  $ snmpget localhost outputVoltage.1
495                  WIENER-CRATE-MIB::outputVoltage.u0 = Opaque: Float: 0.000000
496              V
497                  $ snmpget -Op +020.12 localhost outputVoltage.1
498                  WIENER-CRATE-MIB::outputVoltage.u0    =    Opaque:    Float:
499              +000000.000000000000 V
500
501       -Oq    Removes  the  equal  sign  and  type information when displaying
502              varbind values:
503                  SNMPv2-MIB::sysUpTime.0 1:15:09:27.63
504
505       -OQ    Removes the type information when displaying varbind values:
506                  SNMPv2-MIB::sysUpTime.0 = 1:15:09:27.63
507
508       -Os    Display the MIB object name (plus any instance or other subiden‐
509              tifiers):
510                  sysUpTime.0 = Timeticks: (14096763) 1 day, 15:09:27.63
511
512       -OS    Display the name of the MIB, as well as the object name:
513                  SNMPv2-MIB::sysUpTime.0   =  Timeticks:  (14096763)  1  day,
514              15:09:27.63
515
516              This is the default OID output format.
517
518       -Ot    Display TimeTicks values as raw numbers:
519                  SNMPv2-MIB::sysUpTime.0 = 14096763
520
521       -OT    If values are printed as Hex strings, display a  printable  ver‐
522              sion as well.
523
524       -Ou    Display the OID in the traditional UCD-style (inherited from the
525              original CMU code).  That means removing a series of  "standard"
526              prefixes  from the OID, and displaying the remaining list of MIB
527              object names (plus any other subidentifiers):
528                  system.sysUpTime.0   =   Timeticks:   (14096763)   1    day,
529              15:09:27.63
530
531       -OU    Do not print the UNITS suffix at the end of the value.
532
533       -Ov    Display the varbind value only, not the OID:
534                  $ snmpget -c public -v 1 -Ov localhost ipForwarding.0
535                  INTEGER: forwarding(1)
536
537       -Ox    Display  string  values  as  Hex strings (unless there is a DIS‐
538              PLAY-HINT defined for the corresponding  MIB  object).   By  de‐
539              fault,  the library attempts to determine whether the value is a
540              printable or binary string, and displays it accordingly.
541
542              This option does not affect objects that do have a Display Hint.
543
544       -OX    Display table indexes in a more "program like" output, imitating
545              a traditional array-style index format:
546                  $ snmpgetnext -c public -v 1 localhost ipv6RouteTable
547                  IPv6-MIB::ipv6RouteIfIndex.63.254.1.0.255.0.0.0.0.0.0.0.0.0.0.0.64.1 = INTEGER: 2
548                  $ snmpgetnext -c public -v 1 -OX localhost ipv6RouteTable
549                  IPv6-MIB::ipv6RouteIfIndex[3ffe:100:ff00:0:0:0:0:0][64][1] = INTEGER: 2
550
551       Most  of these options can also be configured via configuration tokens.
552       See the snmp.conf(5) manual page for details.
553
554

LOGGING OPTIONS

556       The mechanism and destination to use for logging of warning  and  error
557       messages  can  be  controlled  by  passing various parameters to the -L
558       flag.
559
560       -Ln    Disable all logging.
561
562       -Le    Log messages to the standard error stream.
563
564       -Lf FILE
565              Log messages to the specified file.
566
567       -Lo    Log messages to the standard output stream.
568
569       -Ls FACILITY
570              Log messages via syslog, using the specified facility  ('d'  for
571              LOG_DAEMON,  'u' for LOG_USER, or '0'-'7' for LOG_LOCAL0 through
572              LOG_LOCAL7).
573
574       There are also "upper case" versions of each of  these  options,  which
575       allow  the  corresponding logging mechanism to be restricted to certain
576       priorities of message.  Using standard error logging as an example:
577
578       -LE pri
579              will log messages of priority 'pri' and above to standard error.
580              See below for possible 'pri' values-
581
582       -LE pri1-pri2
583              will  log  messages with priority between 'pri1' and 'pri2' (in‐
584              clusive) to standard error.
585
586       For -LF and -LS the priority specification comes before the file or fa‐
587       cility token.
588
589       The priorities recognised are:
590
591              0 or !  for LOG_EMERG,
592              1 or a for LOG_ALERT,
593              2 or c for LOG_CRIT,
594              3 or e for LOG_ERR,
595              4 or w for LOG_WARNING,
596              5 or n for LOG_NOTICE,
597              6 or i for LOG_INFO, and
598              7 or d for LOG_DEBUG.
599
600       Normal output is (or will be!) logged at a priority level of LOG_NOTICE
601
602

INPUT OPTIONS

604       The  interpretation of input object names and the values to be assigned
605       can be controlled using various parameters of the -I flag.  The default
606       behaviour will be described at the end of this section.
607
608       -Ib    specifies  that  the  given name should be regarded as a regular
609              expression, to match (case-insensitively) against  object  names
610              in  the MIB tree.  The "best" match will be used - calculated as
611              the one that matches the closest to the beginning  of  the  node
612              name  and  the highest in the tree.  For example, the MIB object
613              vacmSecurityModel could be matched by the expression vacmsecuri‐
614              tymodel  (full name, but different case), or vacm.*model (regexp
615              pattern).
616
617              Note that '.' is a special character in regular expression  pat‐
618              terns,  so the expression cannot specify instance subidentifiers
619              or more than one object name.  A "best  match"  expression  will
620              only  be  applied against single MIB object names.  For example,
621              the expression sys*ontact.0 would not match the instance sysCon‐
622              tact.0 (although sys*ontact would match sysContact).  Similarly,
623              specifying  a  MIB  module  name  will  not  succeed   (so   SN‐
624              MPv2-MIB::sys.*ontact would not match either).
625
626       -Ih    disables the use of DISPLAY-HINT information when assigning val‐
627              ues.  This would then require providing the raw value:
628                  snmpset ... HOST-RESOURCES-MIB::hrSystemDate.0
629                                  x "07 D2 0C 0A 02 04 06 08"
630              instead of a formatted version:
631                  snmpset ... HOST-RESOURCES-MIB::hrSystemDate.0
632                                  = 2002-12-10,2:4:6.8
633
634       -Ir    disables checking table indexes and the  value  to  be  assigned
635              against the relevant MIB definitions.  This will (hopefully) re‐
636              sult in the remote agent reporting an  invalid  request,  rather
637              than  checking (and rejecting) this before it is sent to the re‐
638              mote agent.
639
640              Local checks are more efficient (and  the  diagnostics  provided
641              also  tend  to be more precise), but disabling this behaviour is
642              particularly useful when testing the remote agent.
643
644       -IR    enables "random access" lookup of MIB names.  Rather  than  pro‐
645              viding  a full OID path to the desired MIB object (or qualifying
646              this object with an explicit MIB module name), the MIB tree will
647              be searched for the matching object name.  Thus .iso.org.dod.in‐
648              ternet.mib-2.system.sysDescr.0 (or  SNMPv2-MIB::sysDescr.0)  can
649              be specified simply as sysDescr.0.
650
651              Warning:
652                     Since  MIB object names are not globally unique, this ap‐
653                     proach may return a different  MIB  object  depending  on
654                     which MIB files have been loaded.
655
656              The  MIB-MODULE::objectName syntax has the advantage of uniquely
657              identifying a particular MIB object, as well as  being  slightly
658              more efficient (and automatically loading the necessary MIB file
659              if necessary).
660
661       -Is SUFFIX
662              adds the specified suffix to each textual OID given on the  com‐
663              mand  line.   This can be used to retrieve multiple objects from
664              the same row of a table, by specifying a common index value.
665
666       -IS PREFIX
667              adds the specified prefix to each textual OID given on the  com‐
668              mand  line.   This can be used to specify an explicit MIB module
669              name for all objects being retrieved (or for incurably lazy typ‐
670              ists).
671
672       -Iu    enables the traditional UCD-style approach to interpreting input
673              OIDs.  This assumes that OIDs are rooted at the 'mib-2' point in
674              the  tree  (unless  they start with an explicit '.' or include a
675              MIB module name).  So the sysDescr instance above would be  ref‐
676              erenced as system.sysDescr.0.
677
678
679       Object  names  specified  with  a leading '.' are always interpreted as
680       "fully qualified" OIDs, listing the sequence of MIB  objects  from  the
681       root  of the MIB tree.  Such objects and those qualified by an explicit
682       MIB module name are unaffected by the -Ib, -IR and -Iu flags.
683
684       Otherwise, if none of the above input options are  specified,  the  de‐
685       fault  behaviour  for a "relative" OID is to try and interpret it as an
686       (implicitly) fully qualified OID, then  apply  "random  access"  lookup
687       (-IR), followed by "best match" pattern matching (-Ib).
688
689

ENVIRONMENT VARIABLES

691       PREFIX The standard prefix for object identifiers (when using UCD-style
692              output).  Defaults to .iso.org.dod.internet.mgmt.mib-2
693
694       MIBS   The list of MIBs to load. Defaults to
695              SNMPv2-TC:SNMPv2-MIB:IF-MIB:IP-MIB:TCP-MIB:UDP-MIB:
696              SNMP-VACM-MIB.
697              Overridden by the -m option.
698
699       MIBDIRS
700              The  list  of  directories  to  search  for  MIBs.  Defaults  to
701              /usr/share/snmp/mibs.  Overridden by the -M option.
702
703

FILES

705       /etc/snmp/snmpd.conf
706              Agent configuration file. See snmpd.conf(5).
707
708       /etc/snmp/snmp.conf
709
710       ~/.snmp/snmp.conf
711              Application configuration files. See snmp.conf(5).
712
713

SEE ALSO

715       snmpget(1),  snmpgetnext(1),  snmpset(1),   snmpbulkget(1),   snmpbulk‐
716       walk(1),  snmpwalk(1),  snmptable(1), snmpnetstat(1), snmpdelta(1), sn‐
717       mptrap(1),  snmpinform(1),  snmpusm(1),   snmpstatus(1),   snmptest(1),
718       snmp.conf(5).
719
720
721
722
723V5.9.1                            20 Jul 2010                       SNMPCMD(1)
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