Nortel 425-24T, Configuration Manual, Page: 41 / 488

Chapter 1 About Ethernet Switches 325 and 425 41
System Configuration Guide
• receives network management information from adjacent stations on the same
LAN.
LLDP also makes it possible to discover certain configuration inconsistencies or
malfunctions that can result in impaired communications at higher layers. For
example, it can be used to discover duplex mismatches between an IP Phone and
the connected switch.
LLDP is compatible with IETF PROTO MIB (IETF RFC 2922).
Figure 1 shows an example of how LLDP works in a network.
Figure 1 LLDP — how it works
1 The Ethernet Switch and router advertise chassis/port IDs and system
descriptions to each other.
2 The devices store the information about each other in local MIB databases,
accessible using SNMP.
3 A network management system retrieves the data stored by each device and
builds a network topology map.
TM
Ethernet Switch 425
IP Phone
Management
Workstation
Router
1
3
3
2
2