7705 SAR Interfaces
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Interface Configuration Guide
3HE 11011 AAAC TQZZA Edition: 01
3.5 Link Layer Discovery Protocol (LLDP)
The IEEE 802.1ab Link Layer Discovery Protocol (LLDP) allows stations that are
attached to the same IEEE 802 LAN (emulation) to advertise information for the
purpose of populating physical or logical topology and device discovery
management information databases. In other words, IEEE 802.1ab Link Layer
Discovery Protocol allows an LLDP agent to learn connectivity and management
information from adjacent stations. The information obtained via this protocol is
stored in standard MIBs which can be accessed via management protocols such as
SNMP.
LAN emulation and logical topology is applicable to customer bridge scenarios
(enterprise or carrier of carrier) connected to a provider network offering a
transparent LAN emulation service to their customers. LAN emulation helps
customers detect intermediate provider misconnections by offering a view of the
customer topology where the provider service is represented as a LAN
interconnecting customer bridges.
The IEEE 802.1ab standard defines a protocol that:
• advertises connectivity and management information about the local station to
adjacent stations on the same IEEE 802 LAN
• receives network management information from adjacent stations on the same
IEEE 802 LAN
• operates with all IEEE 802 access protocols and network media
• establishes a network management information schema and object definitions
that are suitable for storing connection information about adjacent stations
• provides compatibility with a number of MIBs as shown in Figure 21
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