Introduction Introduction
Software Reference for SwitchBlade x3100 Series Switches (Network Management)
7-70
FIGURE 7-7 Main LLDP Components
The LLDP protocol is restricted to a single Local Area Network (LAN). LLDP is prohibited from relaying infor-
mation from one port to another port on the same NE device and therefore prohibited from relaying informa-
tion through a bridged network.
Note that the main purpose of the LLDP protocol is to advertise data that is useful for discovering pertinent
information about a network link port. It is not intended to be used as a configuration protocol in a NE. In
other words, the LLDP protocol is not intended to be used to configure the receiving port in a NE based upon
the advertised information for the corresponding peer port received from the neighboring NE via the network
link spanning them.
During the operation of the LLDP protocol, the advertised data could also be used by NMS to discover port
data configuration inconsistencies at the local NE and remote NE ends, which results in communication failure
between the two NEs. Note however that the LLDP protocol does not provide any mechanisms or procedures
to correct these inconsistencies. It is left to the network provider to correct the inconsistencies discovered via
the LLDP protocol with minimum service interruption.
7.4.1.2 Definitions and Terms
The following terms are used when describing the LLDP protocol:
• LLDP-Aware NE - A network element that has implemented the LLDP protocol.
• Non-LLDP NE - A network element that is not capable of executing the LLDP protocol procedures.
Switch NE and Router NE advertise
their LLDP data to each other
NEs store information about each
other in local storage
NMS retrieves the data stored by
each NE and builds a topology
LLDP DataLLDP Data
Network Physical Link
1
1
1
2
2
2
33
3
LLDP_Physical
SBx3100
SBx3112
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