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       The ucd-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.


       First  off,  there  are numerous places that configuration
       files can be found and read from.  By default, the  appli­
       cations  look  for  configuration files in the following 3
       directories, in order: /usr/share/snmp, /usr/lib/snmp, and
       $HOME/.snmp.   In  each of these directories, it looks for
       files with the extension of  both  .conf  and  .local.conf
       (reading the second on last).  In this manner, there are 6
       default places a configuration  file  can  exist  for  any
       given configuration file type.

       Additionally,  the  above default search path can be over­
       ridden by setting the environment variable SNMPCONFPATH to
       a ':' separated list of directories to search for.

       Finally, applications that store persistent data will also
       look in the /var/snmp directory  for  configuration  files


       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 appli­
       cations  understand  how  to  read  the  contents  of  the
       snmp.conf files.  Note, however, that configuration direc­
       tives understood in one file  may  not  be  understood  in
       another  file.   For further information, read the associ­
       ated manual page with each configuration file type.  Also,
       most of the applications support a '-H' switch on the com­
       mand line that will list the configuration files  it  will
       look  for  and  the  directives in each one that it under­

       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.


       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  exam­
       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

              # make this file handle snmp.conf tokens:
              dumpPacket true
              logTimestamp true
              # return to our original snmpd.conf tokens:
              rocommunity mypublic


       Any lines beginning with the character '#' in the configu­
       ration  files are treated as a comment and are not parsed.


       Information about writing C code that makes  use  of  this
       system  in  either  the agent's mib modules or in applica­
       tions can be found in the read_config(3) manual page.



                           28 Aug 2001               SNMP.CONF(5)



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