Configuring Lldp; Overview; Basic Concepts - HPE FlexNetwork 5510 HI Series Configuration Manual

Configuring LLDP

You can set an Ethernet interface to work in Layer 3 mode by using the port link-mode route
command (see

Overview

In a heterogeneous network, a standard configuration exchange platform makes sure different types
of network devices from different vendors can discover one another and exchange configuration.
The Link Layer Discovery Protocol (LLDP) is specified in IEEE 802.1AB. The protocol operates on
the data link layer to exchange device information between directly connected devices. With LLDP, a
device sends local device information as TLV (type, length, and value) triplets in LLDP Data Units
(LLDPDUs) to the directly connected devices. Local device information includes its system
capabilities, management IP address, device ID, and port ID. The device stores the device
information in LLDPDUs from the LLDP neighbors in a standard MIB. For more information about
MIBs, see Network Management and Monitoring Configuration Guide. LLDP enables a network
management system to quickly detect and identify Layer 2 network topology changes.

Basic concepts

LLDP agent
An LLDP agent is a mapping of an entity where LLDP runs. Multiple LLDP agents can run on the
same interface.
LLDP agents are divided into the following types:
•
Nearest bridge agent.
•
Nearest customer bridge agent.
•
Nearest non-TPMR bridge agent.
A Two-port MAC Relay (TPMR) is a type of bridge that has only two externally-accessible bridge
ports, and supports a subset of the functions of a MAC bridge. A TPMR is transparent to all
frame-based media-independent protocols except for the following:
•
Protocols destined to it.
•
Protocols destined to reserved MAC addresses that the relay function of the TPMR is
configured not to forward.
LLDP exchanges packets between neighbor agents and creates and maintains neighbor information
for them. Figure 71
modes: customer bridge (CB) and service bridge (SB).
Figure 71 LLDP neighbor relationships
Nearest
customer
bridge
Nearest non-
TPMR bridge
Nearest bridge
GE1/0/1
CB 1
"Configuring Ethernet
shows the neighbor relationships for these LLDP agents. LLDP has two bridge
Nearest non-
TPMR bridge
Nearest bridge
GE1/0/2
SB 1
interfaces").
Nearest non-
TPMR bridge
Nearest bridge Nearest bridge
GE1/0/3
233
Nearest
customer
bridge
Nearest non-
TPMR bridge
GE1/0/4
CB 2