Avaya 4524GT, Руководство по настройке

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Chapter 5: Link Layer Discovery Protocol
(802.1ab)
This chapter describes the Link Layer Discovery Protocol (LLDP) (IEEE 802.1ab) and contains the
following topics:
Link Layer Discovery Protocol (IEEE 802.1AB) Overview on page 63
See the following sections for the procedures to configure LLDP:
• Configuring LLDP using ACLI on page 164
• LLDP configuration using EDM on page 284
Link Layer Discovery Protocol (IEEE 802.1AB) Overview
From Release 5.1 and on, switch software supports the Link Layer Discovery Protocol (LLDP)
(IEEE 802.1AB), which enables stations connected to a LAN to advertise their capabilities to
each other, enabling the discovery of physical topology information for network management.
LLDP-compatible stations can consist of any interconnection device including PCs, IP Phones,
switches, and routers. Each LLDP station stores LLDP information in a standard Management
Information Base (MIB), making it possible for a network management system (NMS) or
application to access the information.
Each LLDP station:
• advertises connectivity and management information about the local station to adjacent
stations on the same 802 LAN (802.3 Ethernet with 4500 Series).
• 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 9: LLDP How it works on page 64 shows an example of how LLDP works in a
network.
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