SNR S2940-8G-v2 Switch Configuration Guide
LLDP-MED
Chapter 13
LLDP-MED
13.1 Introduction to LLDP-MED
LLDP-MED (Link Layer Discovery Protocol-Media Endpoint Discovery) based on 802.1AB LLDP
(Link Layer Discovery Protocol) of IEEE. LLDP provides a standard link layer discovery mode, it
sends local device information (including its major capability, management IP address, device ID
and port ID) as TLV (type/length/value) triplets in LLDPDU (Link Layer Discovery Protocol Data
Unit) to the direct connection neighbors. The device information received by the neighbors will be
stored with a standard management information base (MIB). This allows a network management
system to quickly detect and identify the communication status of the link.
In 802.1AB LLDP, there is no transmission and management about the voice device informa-
tion. To deploy and manage voice device expediently, LLDP-MED TLVs provide multiple infor-
mation, such as PoE (Power over Ethernet), network policy, and the location information of the
emergent telephone service.
13.2 LLDP-MED Configuration Task Sequence
1. Basic LLDP-MED configuration
Command Explanation
Port mode
lldp transmit med tlv all
no lldp transmit med tlv all
Configure the specified port to send all LLDP-MED TLVs.
The no command disables the function.
lldp transmit med tlv capability
no lldp transmit med tlv capabil-
ity
Configure the specified port to send LLDP-MED Capability
TLV. The no command disables the capability.
lldp transmit med tlv networkPol-
icy
no lldp transmit med tlv net-
workPolicy
Configure the specified port to send LLDP-MED Network
Policy TLV. The no command disables the capability.
lldp transmit med tlv extendPoe
no lldp transmit med tlv extend-
Poe
Configure the specified port to send LLDP-MED Extended
Power-Via-MDI TLV. The no command disables the capa-
bility.
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