FibeAir IP-20C/S/E
User Guide
Ceragon Proprietary and Confidential
Page 510 of 597
19.2
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)
19.2.1
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 transmission of LLDP notifications during
normal transmission periods, enter the following command in root view:
root> ethernet lldp notif-interval-set notif-interval <notif-
interval>