Configuring Lldp; About Lldp - Cisco Nexus 9000 Series Configuration Manual

Configuring LLDP

This chapter describes how to configure the Link Layer Discovery Protocol (LLDP) in order to discover
other devices on the local network.
This chapter includes the following sections:
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About LLDP

The Cisco Discovery Protocol (CDP) is a device discovery protocol that allows network management
applications to automatically discover and learn about other Cisco devices that are connected to the network.
To permit the discovery of non-Cisco devices, the switch also supports the Link Layer Discovery Protocol
(LLDP), a vendor-neutral device discovery protocol that is defined in the IEEE 802.1ab standard. LLDP
allows network devices to advertise information about themselves to other devices on the network. This
protocol runs over the data-link layer, which allows two systems running different network layer protocols
to learn about each other.
LLDP is a one-way protocol that transmits information about the capabilities and current status of a device
and its interfaces. LLDP devices use the protocol to solicit information only from other LLDP devices.
LLDP supports a set of attributes that it uses to discover other devices. These attributes contain type, length,
and value (TLV) descriptions. LLDP devices can use TLVs to send and receive information to other devices
on the network. Details such as configuration information, device capabilities, and device identity can be
advertised using this protocol.
LLDP advertises the following TLVs by default:
• Management address
About LLDP, page 209
Licensing Requirements for LLDP, page 210
Guidelines and Limitations for LLDP, page 210
Default Settings for LLDP, page 211
Configuring LLDP, page 211
Verifying the LLDP Configuration, page 214
Configuration Example for LLDP, page 215
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