Users Guide

Switch Feature Overview 81
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 873.
Cisco Protocol Filtering
The Cisco Protocol Filtering feature (also known as Link Local Protocol
Filtering) filters Cisco protocols that should not normally be relayed by a
bridge. The group addresses of these Cisco protocols do not fall within the
IEEE defined range of the 802.1D MAC Bridge Filtered MAC Group
Addresses (01-80-C2-00-00-00 to 01-80-C2-00-00-0F).
For information about configuring LLPF, settings see "Port-Based Traffic
Control" on page 899.
DHCP Layer-2 Relay
This feature permits layer-3 relay agent functionality in layer-2 switched
networks. The switch supports layer-2 DHCP relay configuration on
individual ports, link aggregation groups (LAGs) and VLANs.
For information about configuring layer-2 DHCP relay settings see "Layer-2
and Layer-3 Relay Features" on page 1155.