http://www.perlmonks.org?node_id=293674


in reply to Send SNMP trap

I've a couple quick thoughts/questions on this...

Check where your building your Net::SNMP session, and verify what version of SNMP you are using. The docs for Net::SNMP, at the end of the traps section, states:

NOTE: This method can only be used when the version of the object is set to SNMPv1.

One other thing that poped into my head, is networks. I hope that your two machines are on the same subnet as your manager... Most routers drop snmp by default, just a thought. Should have read your comment more carefully, Doah!

Update:Have you tried changing:
my @oids = ($svSvcName, OCTET_STRING, $message);

To:
my @oids = ($svSvcName, 0x01, $message);

A longshot, but I'm rather inexperienced with sending traps.

LR

Whip me, Beat me, Make me use Y-ModemG.

Replies are listed 'Best First'.
Re: Re: Send SNMP trap
by tertullian01 (Acolyte) on Sep 23, 2003 at 22:04 UTC
    The session is using SNMPv1. I tried changing OCTET_STRING to 0x01 and it ended in the same result. 
    Unknown ASN.1 type [0x01]

    [download]
    I am including the full code so anyone can take a look at what is going on: 
    use strict;
use Net::SNMP qw(:snmp);
my ($session, $error) = Net::SNMP->session(
                                           -hostname    => shift || '$
+host',
                                           -community   => 'public',
                                           -version     => 'snmpv1',
                                           -port        => shift || 16
+2
);

if (!defined($session)) {
    printf("ERROR: %s.\n", $error);
    exit 1;
}

my $svSvcName = '1.3.6.1.4.1.77.1.2.3.1.1';
my $message = "THIS IS AN SNMP TEST";
my @oids = ($svSvcName, "OCTET_STRING", $message);
#my @oids;

my $result = $session->trap(
                            -agentaddr    => '$monitor',
                            -varbindlist  => \@oids
                            #-varbindlist  => [$svSvcName, OCTET_STRIN
+G, "$message"]
);

if (!defined($result)) {

    printf("ERROR: %s.\n", $session->error);

    $session->close;

    exit 1;

}

$session->close;

    [download]
    Also I don't know if this is of importance but the script is running on a Windows 2000 machine with perl 5.8
[reply]
[d/l]
[select]
      
use Net::SNMP qw(:asn1);

# missing $monitor?
my $monitor = '192.168.254.1';

# remove quotes from OCTET_STRING, it's a constant.
my @oids = ($svSvcName, OCTET_STRING, $message);

      [download]

      the above changes make it work for me.

      # snmptrapd -f -P
2003-09-23 15:20:06 NET-SNMP version 5.0.6 Started.
2003-09-23 15:20:25 192.168.254.1(via 192.168.254.1) TRAP, SNMP v1, co
+mmunity public
        SNMPv2-SMI::enterprises Enterprise Specific Trap (0) Uptime: 0
+:00:01.00
        SNMPv2-SMI::enterprises.77.1.2.3.1.1 = STRING: "THIS IS AN SNM
+P TEST"
2003-09-23 15:20:48 192.168.254.1(via 192.168.254.1) TRAP, SNMP v1, co
+mmunity public
        SNMPv2-SMI::enterprises Enterprise Specific Trap (0) Uptime: 0
+:00:01.00
        SNMPv2-SMI::enterprises.77.1.2.3.1.1 = STRING: "THIS IS AN SNM
+P TEST"
2003-09-23 15:21:08 192.168.254.1(via 192.168.254.1) TRAP, SNMP v1, co
+mmunity public
        SNMPv2-SMI::enterprises Enterprise Specific Trap (0) Uptime: 0
+:00:00.00
        SNMPv2-SMI::enterprises.77.1.2.3.1.1 = STRING: "THIS IS AN SNM
+P TEST"

      [download]
[reply]
[d/l]
[select]
        That worked perfectly. I don't remember when I added the quotes to OCTET_STRING but that ridded me of the error. However what fixed the true proble was changing THIS: use Net::SNMP qw(:snmp); TO: use Net::SNMP qw(:asn1); Thanks for your help.
[reply]

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