Switch Features 69Connectivity 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 layerinstance in carrier networks. The CFM feature provides mechanisms to helpyou perform connectivity checks, fault detection, fault verification andisolation, and fault notification per service in a network domain.For information about configuring IEEE 802.1ag settings, see "ConfiguringConnectivity Fault Management" on page 771.Cisco Protocol FilteringThe Cisco Protocol Filtering feature (also known as Link Local ProtocolFiltering) filters Cisco protocols that should not normally be relayed by abridge. The group addresses of these Cisco protocols do not fall within theIEEE defined range of the 802.1D MAC Bridge Filtered MAC GroupAddresses (01-80-C2-00-00-00 to 01-80-C2-00-00-0F).For information about configuring LLPF, settings see "Configuring Port-Based Traffic Control" on page 691.DHCP Layer 2 RelayThis feature permits Layer 3 Relay agent functionality in Layer 2 switchednetworks. The switch supports L2 DHCP relay configuration on individualports, link aggregation groups (LAGs) and VLANs.For information about configuring L2 DHCP Relay settings see "ConfiguringL2 and L3 Relay Features" on page 919.NOTE: The Connectivity Fault Management feature is available only on thePowerConnect M6348.
