Appendix E. SNMP Support for Perl
This appendix summarizes Mike
Mitchell’s SNMP_util
module, which we have
used in our Perl scripts throughout this book. This module is
distributed with Simon Leinen’s SNMP Perl module; Mike’s
module, together with Simon’s, can make SNMP programming a
snap. You can get these modules from http://www.switch.ch/misc/leinen/snmp/perl/
or http://www.cpan.org.
Perl scripts need two
use
statements to take advantage of the SNMP Perl
module:
use BER; use SNMP_Session;
The BER
and SNMP_Session
modules make up the core of Simon’s package. The
SNMP_util
module discussed in this appendix makes
using this package a little easier. It requires only one
use
statement:
use SNMP_util;
Mike’s package uses the other two modules, so it’s not necessary to include all three in your scripts.
MIB Management Routines
The following sections describe a set of routines for working with MIBs.
snmpmapOID( )
The MIB objects in RFC 1213 (MIB-II) and
RFC 2955 (Frame Relay) are preloaded by the routines in this package.
This means that you can refer to a symbolic name like
sysLocation.0 rather than to its numeric OID
(.1.3.6.1.2.1.1.6 ). The
snmpmapOID()
routine allows you to add name-OID
pairs to this map. The routine is used as follows:
snmpmapOID(text, OID, [text, OID...]
)
All the parameters are strings. text is the textual (or symbolic) name that you want to use and OID is the numeric object ID of the object to which the name refers. A single call to this routine may specify any ...
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