Link Layer Discovery Protocol - Cisco Catalyst 4500 Series Configuration Manual

Layer 2 Software Features
Feature guides document features that are supported on many different software releases and platforms.
Your Cisco software release or platform may not support all the features documented in a feature guide.
See the Feature Information table at the end of the feature guide for information about which features in
that guide are supported in your software release. Use Cisco Feature Navigator to find information about
platform support and Cisco software image support. To access Cisco Feature Navigator, go to
http://www.cisco.com/go/cfn. An account on Cisco.com is not required.
IEEE 802.3ad Link Aggregation (LACP)
http://www.cisco.com/en/US/docs/ios/cether/configuration/guide/ce_lnkbndl.html
Link Aggregation Control Protocol (LACP) (802.3ad) for Gigabit Interfaces
http://www.cisco.com/en/US/docs/ios/ios_xe/cether/configuration/guide/ce_lnkbndl_xe.html

Link Layer Discovery Protocol

To support non-Cisco devices and to allow for interoperability between other devices, the switch
supports the IEEE 802.1AB LLDP. Link Layer Discovery Protocol (LLDP) is a neighbor discovery
protocol that is used for 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 supports a set of attributes that it uses to discover neighbor devices. These attributes contain type,
length, and value descriptions and are referred to as TLVs. LLDP supported devices can use TLVs to receive
and send information to their neighbors. Details such as configuration information, device capabilities,
and device identity can be advertised using this protocol.
For information on configuring LLDP, see
Service."
Link State Tracking
Link-state tracking, also known as trunk failover, is a feature that binds the link state of multiple
interfaces. For example, link-state tracking provides redundancy in the network when used with server
NIC adapter teaming. When server network adapters are configured in a primary or secondary
relationship known as teaming, if the link is lost on the primary interface, connectivity is transparently
changed to the secondary interface.
For information on configuring Link State Tracking, see
Link State Tracking."
Location Service
The location service feature allows the switch to provide location and attachment tracking information
for its connected devices to a Cisco Mobility Services Engine (MSE). The tracked device can be a
wireless endpoint, a wired endpoint, or a wired switch or controller. The switch informs device link up
and link down events through encrypted Network Mobility Services Protocol (NMSP) location and
attachment notifications to the MSE.
For information on configuring LLDP, see
Service."
Software Configuration Guide—Release IOS XE 3.3.0SG and IOS 15.1(1)SG
1-6
Chapter 29, "Configuring LLDP, LLDP-MED, and Location
Chapter 24, "Configuring EtherChannel and
Chapter 29, "Configuring LLDP, LLDP-MED, and Location
Chapter 1 Product Overview
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