Lldp Operational Modes; Connectivity And Management Information - Avaya 4524GT Configuration Manual

Link Layer Discovery Protocol (802.1ab)
Figure 9: LLDP How it works
1. The Ethernet Routing Switch and LLDP-enabled router advertise chassis/port IDs
2. The devices store the information about each other in local MIB databases,
3. A network management system retrieves the data stored by each device and builds

LLDP operational modes

LLDP is a one-way protocol. An LLDP agent can transmit information about the capabilities
and current status of the system associated with its MAC service access point (MSAP)
identifier. The LLDP agent also can receive information about the capabilities and current
status of the system associated with a remote MSAP identifier. However, LLDP agents cannot
solicit information from each other.
You can set the local LLDP agent to transmit only, receive only, or to both transmit and receive
LLDP information. You can configure the state for LLDP reception and transmission using
SNMP or ACLI commands.

Connectivity and management information

The information fields in each LLDP frame are in a Link Layer Discovery Protocol Data Unit
(LLDPDU) as a sequence of short, variable length information elements known as TLVs (type,
length, value).
64 Configuration — System
and system descriptions to each other.
accessible by using SNMP.
a network topology map.
April 2011