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Chapter 19: Ethernet Protocols (CLI)
Configuring LLDP (CLI)
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Page 19-382
Configuring LLDP (CLI)
Link Layer Discovery Protocol (LLDP) is a vendor-neutral layer 2 protocol that can be used by a
network element attached to a specific LAN segment to advertise its identity and capabilities and
to receive identity and capacity information from physically adjacent layer 2 peers. LLDP is a part
of the IEEE 802.1AB – 2005 standard that enables automatic network connectivity discovery by
means of a port identity information exchange between each port and its peer. Each port
periodically sends and also expects to receive frames called Link Layer Discovery Protocol Data
Units (LLDPDU). LLDPDUs contain information in TLV format about port identity, such as MAC
address and IP address.
LLDP is used to send notifications to the NMS, based on data of the local unit and data gathered
from peer systems. These notifications enable the NMS to build an accurate network topology.
This section includes:
Configuring the General LLDP Parameters (CLI)
Displaying the General LLDP Parameters (CLI)
Configuring LLDP Port Parameters (CLI)
Displaying LLDP Port Parameters (CLI)
Displaying LLDP Local System Parameters (CLI)
Displaying the LLDP Remote System Parameters (CLI)
Displaying LLDP Statistics (CLI)
Configuring the General LLDP Parameters (CLI)
This section explains how to define the general LLDP parameters for the unit. For instructions on
defining port-specific parameters, see
Configuring LLDP Port Parameters (CLI)
To define the Transmit Interval, which is the interval at which LLDP frames are transmitted, enter
the following command in root view:
root> ethernet lldp tx-interval-set tx-interval <tx-interval>
The time-to-live (TTL) determines the length of time LLDP frames are retained by the receiving
device. The TTL is determined by multiplying the Transmit Interval by the TTL Multiplier.
To define the TTL Multiplier, enter the following command in root view.
root> ethernet lldp tx-hold-multiplier-set hold-multiplier <hold-
multiplier>
To define the interval between transmissions of LLDP notifications during normal transmission
periods, enter the following command in root view.
root> ethernet lldp notif-interval-set notif-interval <notif-interval>