snmp_config(4) File Formats snmp_config(4)NAME
snmp_config - overview of Net-SNMP configuration files
SYNOPSIS
snmp_config
DESCRIPTION
This page gives an overview of the various configuration files used by the Net-SNMP software that is shipped with the Solaris operating
system.
In a configuration file, lines beginning with a hash character (#) are treated as a comment and are not parsed.
Search Order
By default, the Net-SNMP applications look for configuration files in the following directories in the order listed:
1. /etc/sma/snmp
2. /usr/sfw/lib
3. $HOME/.snmp
In each of these directories, the Net-SNMP applications look for files with the extensions .conf and local.conf, in that order.
The default search path described above can be overridden by setting the environment variable SNMPCONFPATH to a colon-separated list of
directories. SNMPCONFPATH is used to allow users to place configuration files in specific directories for their application needs. Cur-
rently defaulted to /etc/sma/snmp and /usr/local/share/snmp.
Applications that store persistent data will also look in the /var/net-snmp directory for configuration files.
Switching Configuration Types in Mid-File
You can switch in mid-file the configuration type that the parser is supposed to be reading. For example, assume you want to turn on packet
dumping output for the agent by default, but you do not want to turn on packet dumping for the rest of the applications (such as snmpget
and snmpwalk). Normally, to enable packet dumping, you would enter a line such as the one below in the snmp.conf file:
dumpPacket true
Such a line turns on packet dumping for all of the applications. Instead, you can put the same line in the snmpd.conf file so that it
applies only to the snmpd daemon. However, you need to tell the parser to expect this line. You do this by putting a special, type-specifi-
cation token inside square brackets. For example, inside your snmpd.conf file you can enter:
[snmp] dumpPacket true
This tells the parser to parse the line as if it were inside a snmp.conf file instead of an snmpd.conf file. If you want to parse multiple
lines rather than just one, you can make the context switch apply to the remainder of the file or until the next context switch directive
by putting the special token on a line by itself:
# make this file handle snmp.conf tokens:
[snmp]
dumpPacket true
logTimestamp true
# return to our original snmpd.conf tokens:
[snmpd]
rocommunity mypublic
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWsmcmd |
+-----------------------------+-----------------------------+
|Interface Stability |External |
+-----------------------------+-----------------------------+
SEE ALSO snmpd.conf(4), attributes(5), sma_snmp(5)SunOS 5.10 16 Jan 2004 snmp_config(4)
Check Out this Related Man Page
SNMP_CONFIG(5) Net-SNMP SNMP_CONFIG(5)NAME
snmp_config - handling of Net-SNMP configuration files
DESCRIPTION
The Net-SNMP package uses various configuration files to configure its applications. This manual page merely describes the overall nature
of them, so that the other manual pages don't have to.
DIRECTORIES SEARCHED
First off, there are numerous places that configuration files can be found and read from. By default, the applications look for configura-
tion files in the following 4 directories, in order: /etc/snmp, /usr/share/snmp, /usr/lib64/snmp, and $HOME/.snmp. In each of these direc-
tories, it looks for files with the extension of both conf and local.conf (reading the second ones last). In this manner, there are 8
default places a configuration file can exist for any given configuration file type.
Additionally, the above default search path can be overridden by setting the environment variable SNMPCONFPATH to a colon-separated list of
directories to search for. The path for the persistent data should be included when running applications that use persistent storage, such
as snmpd.
Applications will read persistent configuration files in the following order of preference:
file in SNMP_PERSISTENT_FILE environment variable
directories in SNMPCONFPATH environment variable
directory defined by persistentDir snmp.conf variable
directory in SNMP_PERSISTENT_DIR environment variable
default /var/lib/net-snmp directory
Finally, applications will write persistent configuration files in the following order of preference:
file in SNMP_PERSISTENT_FILE environment variable
directory defined by persistentDir snmp.conf variable
directory in SNMP_PERSISTENT_DIR environment variable
default /var/lib/net-snmp directory
Note: When using SNMP_PERSISTENT_FILE, the filename should match the application name. For example, /var/net-snmp/snmpd.conf.
CONFIGURATION FILE TYPES
Each application may use multiple configuration files, which will configure various different aspects of the application. For instance,
the SNMP agent (snmpd) knows how to understand configuration directives in both the snmpd.conf and the snmp.conf files. In fact, most
applications understand how to read the contents of the snmp.conf files. Note, however, that configuration directives understood in one
file may not be understood in another file. For further information, read the associated manual page with each configuration file type.
Also, most of the applications support a -H switch on the command line that will list the configuration files it will look for and the
directives in each one that it understands.
The snmp.conf configuration file is intended to be a application suite wide configuration file that supports directives that are useful for
controlling the fundamental nature of all of the SNMP applications, such as how they all manipulate and parse the textual SNMP MIB files.
SWITCHING CONFIGURATION TYPES IN MID-FILE
It's possible to switch in mid-file the configuration type that the parser is supposed to be reading. Since that sentence doesn't make
much sense, lets give you an example: say that you wanted to turn on packet dumping output for the agent by default, but you didn't want to
do that for the rest of the applications (ie, snmpget, snmpwalk, ...). Normally to enable packet dumping in the configuration file you'd
need to put a line like:
dumpPacket true
into the snmp.conf file. But, this would turn it on for all of the applications. So, instead, you can put the same line in the snmpd.conf
file so that it only applies to the snmpd daemon. However, you need to tell the parser to expect this line. You do this by putting a spe-
cial type specification token inside a [] set. In other words, inside your snmpd.conf file you could put the above snmp.conf directive by
adding a line like so:
[snmp] dumpPacket true
This tells the parser to parse the above line as if it were inside a snmp.conf file instead of an snmpd.conf file. If you want to parse a
bunch of lines rather than just one then you can make the context switch apply to the remainder of the file or until the next context
switch directive by putting the special token on a line by itself:
# make this file handle snmp.conf tokens:
[snmp]
dumpPacket true
logTimestamp true
# return to our original snmpd.conf tokens:
[snmpd]
rocommunity mypublic
COMMENTS
Any lines beginning with the character '#' in the configuration files are treated as a comment and are not parsed.
API INTERFACE
Information about writing C code that makes use of this system in either the agent's MIB modules or in applications can be found in the
read_config(3) manual page.
SEE ALSO snmpconf(1), read_config(3), snmp.conf(5), snmpd.conf(5)4th Berkeley Distribution 5 May 2005 SNMP_CONFIG(5)