LLDP-EXT-MED-MIB

MIB Reference — IPNetwork Monitor · Updated September 09, 2026

All MIBsLLDP-EXT-MED-MIB

Organization: TIA TR41.4 Working Group

Last Updated: 2005-07-28

Category: Protocol: LLDP

Description: LLDP-MED (Media Endpoint Discovery) extension MIB defined by TIA for VoIP devices, supporting network policy and location identification.

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What Is LLDP-EXT-MED-MIB?

LLDP-EXT-MED-MIB (also known as LLDP-MED) is a vendor-neutral standards-based MIB defined by TIA (TR-41.4, published as ANSI/TIA-1057) that extends the base LLDP-MIB with Media Endpoint Discovery capabilities for VoIP and other network endpoint devices. It exposes configuration and discovery data including per-port media policy configuration (VLAN ID, priority, application type), device class information, and TLV transmission/notification enable settings. Its main monitoring value is in software/configuration status: it lets administrators verify that a port is correctly advertising and receiving network policy (VLAN, QoS priority) and location information needed for phones or other media endpoints to auto-configure, and that LLDP-MED notifications are enabled to catch topology or policy changes. It explicitly depends on and branches from the base LLDP-MIB (lldpExtensions) using a TIA-assigned OUI, so it cannot function independently of core LLDP support; engineers researching the LLDP-EXT-MED-MIB RFC lineage will find that LLDP-MED itself is a TIA/ANSI standard rather than an IETF RFC, though it is commonly discussed alongside the IEEE 802.1AB LLDP specification. It is typically deployed on switches and VoIP phones/endpoints in enterprise networks to support plug-and-play voice/video device provisioning.

IPNetwork Monitor allows you to monitor SNMP objects defined in LLDP-EXT-MED-MIB. Use the built-in SNMP Monitoring Browser to explore available variables, view their current values and descriptions, and select the objects you want to monitor. You can then create SNMP monitors, configure thresholds, and receive alerts when monitored values change.

Supported Devices

  • vendor-neutral, standards-based MIB, not tied to a specific manufacturer
  • LAN switch with LLDP-MED support
  • VoIP phone or media endpoint device

Monitoring Examples

An administrator would poll lldpXMedPortConfigTable/lldpXMedPortConfigEntry to check whether a given switch port has lldpXMedPortConfigTLVsTxEnable and lldpXMedPortConfigNotifEnable set correctly, and inspect lldpXMedLocMediaPolicyTable entries (lldpXMedLocMediaPolicyVlanID, lldpXMedLocMediaPolicyPriority) to confirm the voice VLAN and priority being advertised to an attached IP phone. If lldpXMedPortCapSupported shows the device class capability but lldpXMedLocDeviceClass is not populated as expected, this points to a misconfigured or non-compliant endpoint failing to receive proper network policy. lldpXMedFastStartRepeatCount governs how aggressively fast LLDP-MED exchanges occur at link-up, useful when diagnosing slow endpoint provisioning.

What Can Be Monitored

  • media endpoint device class
  • per-port media policy (VLAN, priority)
  • TLV transmit/notification enable settings
  • LLDP-MED fast-start repeat count
  • location identification data
Imported Objects

From LLDP-MIB

lldpExtensionsOBJECT-IDENTITY
lldpLocPortNumOBJECT-TYPE
lldpPortConfigEntryOBJECT-TYPE
lldpRemChassisIdOBJECT-TYPE
lldpRemChassisIdSubtypeOBJECT-TYPE
lldpRemIndexOBJECT-TYPE
lldpRemLocalPortNumOBJECT-TYPE
lldpRemTimeMarkOBJECT-TYPE

From SNMP-FRAMEWORK-MIB

SnmpAdminString

From SNMPv2-CONF

MODULE-COMPLIANCE
NOTIFICATION-GROUP
OBJECT-GROUP

From SNMPv2-SMI

Gauge32
Integer32
MODULE-IDENTITY
NOTIFICATION-TYPE
OBJECT-TYPE
Unsigned32

From SNMPv2-TC

TEXTUAL-CONVENTION
TruthValue
OIDs

RFC description

Link Layer Discovery Protocol Media Endpoint Devices extension (RFC 3634).

Start monitoring Vendor-neutral TIA/IEEE standard, LLDP-MED (LAN switch/VoIP phone or media endpoint) with a free 30-day trial of IPNetwork Monitor. Import MIBs, browse SNMP OIDs, create custom SNMP monitors, configure alerts, and monitor any SNMP-enabled network device from a single console.

Download LLDP-EXT-MED-MIB