SNMP::...Juniper(3pm)

💖 SNMP::Info::Layer3::Juniper 💖

okay so bestie, this is a page from the User Contributed Perl Documentation (the SNMP::...Juniper(3pm) manual, which is the short name for SNMP::Info::Layer3::Juniper) and it's literally the whole guide to talking SNMP to Juniper routers. no cap. let's get into it 🦋

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✨ NAME ✨

SNMP::Info::Layer3::Juniper — the SNMP Interface to L3 Juniper Devices. it's giving layer three, but make it Juniper. 💅

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🎀 AUTHOR 🎀

Bill Fenner — the icon who wrote this. 👑

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✨ SYNOPSIS ✨

so here's how you use it, fr fr:

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

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

like, you just let it figure out what device you're on (that's the AutoSpecify), and it prints the subclass it landed on. main character energy, honestly. ✨

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💜 DESCRIPTION 💜

this is the subclass for Juniper Devices running JUNOS. that's the vibe. that's the whole vibe.

🌸 Inherited Classes 🌸

• SNMP::Info::Layer3 — yeah she inherits from Layer3, as one does.

🌈 Required MIBs 🌈

bestie you're gonna need these loaded, no skipping:

• JUNIPER-VLAN-MIB dated "200901090000Z" or later. (yes, it needs to be that one or newer, don't come at me with an old one 🙈)
• JUNIPER-CHASSIS-DEFINES-MIB
• JUNIPER-MIB
• JUNIPER-VIRTUALCHASSIS-MIB
• JUNIPER-L2ALD-MIB

🧚 Inherited Classes' MIBs 🧚

go check "Required MIBs" in SNMP::Info::Layer3 for its own MIB requirements, because she has her own needs too.

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👑 GLOBALS 👑

these are the methods that return scalar values from SNMP. just one little value each. simple. elegant. iconic.

• $juniper->vendor() — returns 'juniper'. that's it. that's the whole method. 💖
• $juniper->os() — returns 'junos'. slay.
• $juniper->layers() — checks the forwarding table for Layer 2 support, because some routers with switches do not report layers properly. like, they lie a little. so we check ourselves. 🫶
• $juniper->os_ver() — returns the software version, extracted first from "sysDescr", or from "lldpLocSysDesc" if it's not available in "sysDescr".
• $juniper->model() — returns the model from "sysObjectID", with "jnxProductName" removed from the beginning. bye prefix. 💅
• $juniper->serial() — returns serial number. that comes from ("jnxBoxSerialNo").
• $juniper->mac() — returns the MAC address used by this bridge when it must be referred to in a unique fashion. from ("dot1dBaseBridgeAddress").
• $juniper->box_descr() — the name, model, or detailed description of the device. from ("jnxBoxDescr").
• $juniper->version() — pulls from ("jnxVirtualChassisMemberSWVersion").
• $juniper->vc_model() — pulls from ("jnxVirtualChassisMemberModel").

🌟 Globals imported from SNMP::Info::Layer3 🌟

see the documentation in "GLOBALS" in SNMP::Info::Layer3 for the details, bestie.

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🔥 TABLE METHODS 🔥

these ones return tables of info — as a reference to a hash. so many hashes. we love a hash. 💜

• $juniper->qb_fdb_index() — returns a reference to a hash: key = FDB ID, value = VLAN ID.
• $juniper->v_index() — returns ("jnxL2aldVlanTag") or ("jnxExVlanTag") depending upon switch software version.
• $juniper->v_name() — returns ("jnxL2aldVlanName") or ("jnxExVlanName") depending upon switch software version.
• $juniper->v_type() — returns ("jnxL2aldVlanType") or ("jnxExVlanType") depending upon switch software version.
• $juniper->i_trunk() — from ("jnxExVlanPortAccessMode").
• $juniper->i_vlan() — returns a mapping between "ifIndex" and the PVID or default VLAN.
• $juniper->i_vlan_membership() — returns a reference to a hash of arrays: key = "ifIndex", value = array of VLAN IDs. these are the VLANs which are members of the egress list for the port.
• $juniper->i_vlan_membership_untagged() — returns a reference to a hash of arrays: key = "ifIndex", value = array of VLAN IDs. these are the VLANs which are members of the untagged egress list for the port. (untagged!! different list!! don't mix them up 😭)
• $juniper->peth_port_ifindex() — returns a reference to a hash: key = PowerEthernet MIB interface number, value = "ifIndex". since Juniper does not provide a mapping function, this does it manually. for example, ge-0/0/1 registers as PowerEthernet interface '1.2'. (manual labor, but make it cute 🎀)

🦋 Pseudo ENTITY-MIB information 🦋

these methods emulate the ENTITY-MIB Physical Table methods using JUNIPER-MIB and JUNIPER-VIRTUALCHASSIS-MIB. fake it till you make it, but accurately. ✨

• $juniper->e_index() — returns a reference to a hash. Key: IID, Value: Integer, indices are combined into a eight digit integer, each index is two digits padded with leading zero if required.
• $juniper->e_class() — returns a reference to a hash. Key: IID, Value: General hardware type.
• $juniper->e_descr() — returns a reference to a hash. Key: IID, Value: Human friendly name.
• $juniper->e_hwver() — returns a reference to a hash. Key: IID, Value: Hardware version.
• $juniper->e_vendor() — returns a reference to a hash. Key: IID, Value: juniper.
• $juniper->e_serial() — returns a reference to a hash. Key: IID, Value: Serial number.
• $juniper->e_pos() — returns a reference to a hash. Key: IID, Value: The relative position among all entities sharing the same parent.
• $juniper->e_type() — returns a reference to a hash. Key: IID, Value: Type of component/sub-component as defined in JUNIPER-CHASSIS-DEFINES-MIB.
• $juniper->e_parent() — returns a reference to a hash. Key: IID, Value: The value of e_index() for the entity which 'contains' this entity. a value of zero indicates this entity is not contained in any other entity.
• $entity->e_fru() — BOOLEAN. Is a Field Replaceable unit? comes from ("entPhysicalFRU").

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

see the documentation in "TABLE METHODS" in SNMP::Info::Layer3 for the details, bestie.

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💀 reminder: this all came from perl v5.40.1, dated 2026-02-28. that's your version and your date, don't forget them. 🫶

and that's the whole page!! go forth and SNMP responsibly, queen. 💖✨👑