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TIA-1057 (LLDP-MED) Overview
Link layer discovery protocol — media endpoint discovery (LLDP-MED) as defined by ANSI/ TIA-1057—
provides additional organizationally specific TLVs so that endpoint devices and network connectivity
devices can advertise their characteristics and configuration information; the OUI for the
Telecommunications Industry Association (TIA) is 00-12-BB.
• LLDP-MED Endpoint Device — any device that is on an IEEE 802 LAN network edge can
communicate using IP and uses the LLDP-MED framework.
• LLDP-MED Network Connectivity Device — any device that provides access to an IEEE 802 LAN to an
LLDP-MED endpoint device and supports IEEE 802.1AB (LLDP) and TIA-1057 (LLDP-MED). The Dell
Networking system is an LLDP-MED network connectivity device.
Regarding connected endpoint devices, LLDP-MED provides network connectivity devices with the ability
to:
• manage inventory
• manage Power over Ethernet (PoE)
• identify physical location
• identify network policy
LLDP-MED is designed for, but not limited to, VoIP endpoints.
TIA Organizationally Specific TLVs
The Dell Networking system is an LLDP-MED Network Connectivity Device (Device Type 4).
Network connectivity devices are responsible for:
• transmitting an LLDP-MED capability TLV to endpoint devices
• storing the information that endpoint devices advertise
The following table describes the five types of TIA-1057 Organizationally Specific TLVs.
Table 42. TIA-1057 (LLDP-MED) Organizationally Specific TLVs
Type SubType TLV Description
127 1 LLDP-MED Capabilities Indicates:
• whether the
transmitting device
supports LLDP-MED
• what LLDP-MED
TLVs it supports
• LLDP device class
127 2 Network Policy Indicates the application
type, VLAN ID, Layer 2
Priority, and DSCP value.
127 3 Location Identification Indicates that the
physical location of the
Link Layer Discovery Protocol (LLDP)
547