User's Manual

Dell Networking W-Series ArubaOS 6.4.x| User Guide Link Layer Discovery Protocol | 595
Chapter 26
Link Layer Discovery Protocol
ArubaOS provides support for Link Layer Discovery Protocol (LLDP) on the controllers 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:
l Important Points to Remember on page 595
l LLDP Overview on page 595
l Configuring LLDP on page 596
l Monitoring LLDP Configuration on page 596
Important Points to Remember
l Inventory-management, and Location TLVs are not currently supported.
l Aggregation-management and Power-management TLVs are not supported.
l LLDP-MED will be supported in a future release.
l SNMP support is currently not available for LLDP MIBs.
l LLDP is not supported on the expanded slots and the management port of the W-6000M3 controller.
l Cisco Discovery Protocol (CDP) proprietary is not supported.
l The maximum number of neighbors that can be learnt on the controllers (including all the per port
neighbor) 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. ArubaOS supports a simple one-way
neighbor discovery protocol with periodic transmissions of LLDP PDU.
l LLDP frames are constrained to a local link.
l LLDP frames are TLV (Type-Length-Value) form.
l 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
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.
ArubaOS supports the following optional basic management TLVs which are enabled by default:
l MAC Phy configuration TLV
l Management address TLV
l Maximum frame size TLV
l Port-description TLV
l Port VLAN ID TLV
l System capabilities TLV
l System description TLV