Users Guide

92 Switch Feature Overview
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 1023.
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 949.
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 1235.
NOTE: This feature is available on the Dell EMC NetworkingN1500/N2200
Switches Series switches only.