Administrator Guide

Switch Feature Overview 79
Link Layer Discovery Protocol (LLDP)
The IEEE 802.1AB defined standard, Link Layer Discovery Protocol (LLDP),
allows the switch to advertise major capabilities and physical descriptions.
This information can be used to help identify system topology and detect bad
configurations on the LAN.
For information about configuring LLDP, settings see "Discovering Network
Devices " on page 825.
Link Layer Discovery Protocol (LLDP) for Media Endpoint Devices
The Link Layer Discovery Protocol for Media Endpoint Devices (LLDP-
MED) provides an extension to the LLDP standard for network configuration
and policy, device location, and Power over Ethernet.
For information about configuring LLDP-MED, settings see "Discovering
Network Devices " on page 825.
Connectivity Fault Management (IEEE 802.1ag)
The Connectivity Fault Management (CFM) feature, also known as Dot1ag,
supports Service Level Operations, Administration, and Management
(OAM). CFM is the OAM Protocol provision for end-to-end service layer
instance in carrier networks. The CFM feature provides mechanisms to help
perform connectivity checks, fault detection, fault verification and isolation,
and fault notification per service in a network domain.
For information about configuring IEEE 802.1ag settings, see "Connectivity
Fault Management " on page 923.
Priority-based Flow Control (PFC)
The Priority-based Flow Control feature allows the switch to pause or inhibit
transmission of individual priorities within a single Ethernet link. By
configuring PFC to pause a congested priority (priorities) independently,
NOTE: This feature is available on the Dell Networking N4000 Series switches
only.
NOTE: This feature is available on the Dell Networking N4000 Series switches
only.