SNMP::...NetSNMP(3pm)

💖 SNMP::Info::Layer3::NetSNMP — bestie's guide to talking SNMP to L3 Net-SNMP devices 💖

okay so real talk: this whole page is SNMP::Info::Layer3::NetSNMP, and it lives in the User Contributed Perl Documentation part of your man pages. yes, the tile says SNMP::...NetSNMP(3pm) because terminals are dramatic and truncate things. iconic of them honestly.

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✨ NAME ✨

SNMP::Info::Layer3::NetSNMP — it's the SNMP Interface to L3 Net-SNMP Devices. that's it, that's the whole vibe. 🦋

👑 AUTHORS 👑

Bradley Baetz and Bill Fenner — the legends who wrote this. we stan. 🫶

🌸 SYNOPSIS 🌸

watch me, this is how you do it:

# Let SNMP::Info determine the correct subclass for you.
my $netsnmp = new SNMP::Info(
                         AutoSpecify => 1,
                         Debug       => 1,
                         DestHost    => 'myrouter',
                         Community   => 'public',
                         Version     => 2
                       )
   or die "Can't connect to DestHost.\n";

my $class      = $netsnmp->class();
print "SNMP::Info determined this device to fall under subclass : $class\n";

so you let SNMP::Info do the detective work and figure out which subclass you actually belong to, no cap. then you ask it class() and print the answer like the proud main character you are. ✨

💅 DESCRIPTION 💅

it's a subclass for Generic Net-SNMP devices. lowkey does exactly what it says on the tin.

🧬 Inherited Classes

• SNMP::Info::Layer3 — yeah, everything in there comes along for the ride.

📚 Required MIBs

these are the MIBs you GOTTA have, fr fr:

• UCD-SNMP-MIB
• NET-SNMP-TC
• HOST-RESOURCES-MIB

🎀 Inherited Classes' MIBs

• peep SNMP::Info::Layer3 for its own MIB requirements, bestie. it's got its own list.

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⭐ GLOBALS ⭐

these are the methods that return a scalar value straight from SNMP. lil one-value snacks. 🍓

• $netsnmp->vendor() — returns 'Net-SNMP'. that's the whole answer, periodt.
• $netsnmp->os() — returns the OS extracted from "sysDescr".
• $netsnmp->os_ver() — returns the software version extracted from "sysDescr", along with the Net-SNMP version. two-for-one, we love.
• $netsnmp->uptime() — returns the system uptime instead of the agent uptime.

NOTE: discontinuity timers and other Time Stamp based objects are based on agent uptime, so use orig_uptime() for those. don't get caught out, bestie 😭

• $netsnmp->serial() — returns ''. yeah. literally empty. it's giving nothing and it's honest about it. 💀

🫶 Globals imported from SNMP::Info::Layer3

see the documentation in SNMP::Info::Layer3 for details. it's all over there. 👀

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🔥 TABLE ENTRIES 🔥

these methods return tables of info in the form of a reference to a hash. tables, bestie. whole entire tables.

🧚 Overrides

• $netsnmp->i_ignore() — returns a reference to hash. increments the value of IID if the port is to be ignored.
  • Ignores loopback. bye bye loopback, not today. 🙈

🌈 Table Methods imported from SNMP::Info::Layer3

see the documentation in SNMP::Info::Layer3 for details. go read it, iykyk.

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💜 NOTES 💜

so, here's the tea. for SNMP::Info to actually classify your device into this class, you might need to drop a config line into your snmpd.conf that looks a lil something like

sysobjectid .1.3.6.1.4.1.8072.3.2.N

where N is the object ID for your OS from the "NET-SNMP-TC" MIB — or 255 if it's not listed. yep, 255, the fallback bestie. some Net-SNMP installations just default to an incorrect return value for "system.sysObjectId", which is annoying but we move.

and for a Net-SNMP device to get recognized as Layer3, you may need a config line similar to

sysservices 76

in your snmpd.conf. yes, 76. put it in. 💅

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and that's the whole page, bestie!! 🎀 this was SNMP::...NetSNMP(3pm) from perl v5.40.1, dated 2026-02-28. go forth and subclass responsibly. slay. ✨👑🦋💖