AOS-W 6.5.3.x | User Guide Link Layer Discovery Protocol | 657
Chapter 26
Link Layer Discovery Protocol
AOS-W provides support for Link Layer Discovery Protocol (LLDP) on the switches to advertise identity
information and capabilities to other nodes on the network, and store the information discovered about the
neighbors.
This chapter contains the following major sections:
n Important Points to Remember on page 657
n LLDP Overview on page 657
n Configuring LLDP on page 658
n Monitoring LLDP Configuration on page 659
Important Points to Remember
n Inventory-management and Location TLVs are not currently supported.
n Aggregation-management and Power-management TLVs are not supported.
n SNMP support is currently unavailable for LLDP MIBs.
n Cisco Discovery Protocol (CDP) proprietary is not supported.
n The maximum number of neighbors that can be learned on the switches (including all the per port
neighbors) is 250.
LLDP Overview
Link Layer Discovery Protocol (LLDP), defined in the IEEE 802.1AB standard, is a Layer 2 protocol that allows
network devices to advertise their identity and capabilities on a LAN. AOS-W supports a simple one-way
neighbor discovery protocol with periodic transmissions of LLDP PDU.
n LLDP frames are constrained to a local link.
n LLDP frames are TLV (Type-Length-Value) form.
n LLDP Multicast address is 01-80-C2-00-00-0E.
LLDP provides support for a set of attributes used to discover neighbor devices. These attributes are referred
to as TLVs, which contain type, length, and value descriptions. LLDP supported devices use TLVs to receive and
send information such as configuration information, device capabilities, and device identity to their neighbors.
AOS-W supports the following optional basic management TLVs that are enabled by default:
n MAC Phy configuration TLV
n Management address TLV
n Maximum frame size TLV
n Port-description TLV
n Port VLAN ID TLV
n System capabilities TLV
n System description TLV
n System name TLV
n VLANname TLV
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