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changing localaddr

by vpitchai (Initiate)
on Nov 02, 2011 at 14:53 UTC ( #935414=perlquestion: print w/ replies, xml ) Need Help??
vpitchai has asked for the wisdom of the Perl Monks concerning the following question:

Hi Experts; I am using the perl NET SNMP module to send SMNP version 2 traps, able to set the managers address (dest. ip address) with the hostname option without any issues but struggling to change the source ip address of the trap packet. If i set the localaddr to a different ip address (in my case, the ip address of the device), the script execution fails. What are options to set the source ip address? Thanks

Comment on changing localaddr
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Re: changing localaddr
by NetWallah (Abbot) on Nov 02, 2011 at 15:40 UTC
Re: changing localaddr
by Khen1950fx (Canon) on Nov 02, 2011 at 17:30 UTC
    I was thinking along the same lines as NetWallah, but I discovered that -agentaddr isn't recognized by SNMPv2c. Maybe this is closer to what you need.
    #!/usr/bin/perl use strict; use warnings; use Net::SNMP::XS; use Net::SNMP qw(:ALL); my ( $session, $error ) = Net::SNMP->session( -hostname => '', -community => 'public', -localaddr => '', -port => SNMP_TRAP_PORT, -version => 'snmpv2c', -community => 'public', -debug => '0x02', -nonblocking => 0, ); if ( not defined $session ) { printf "ERROR: %s.\n", $error; exit 1; } my $result = $session->snmpv2_trap( -varbindlist => [ '', TIMETICKS, 600, '', OBJECT_IDENTIFIER, '', '', OCTET_STRING, 'Hub', '', OCTET_STRING, 'Closet Hub', ], ); if ( not defined $result ) { printf "ERROR: %s.\n", $session->error(); } else { printf "SNMPv2-Trap-PDU sent.\n"; }
Re: changing localaddr
by McA (Priest) on Nov 02, 2011 at 15:16 UTC

    probably a silly question, but the source address you specify is one which is bound to an interface on your sending machine?
    What is the error message?

    Best regards

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