Users Guide

Layer 2 Switching Commands 456
Ethernet CFM Commands
Dell EMC Networking N1500/N2200/N3200 Series Switches
Connectivity Fault Management (CFM) is the OAM Protocol provision for
end-to-end service layer OAM in carrier Ethernet networks. CFM provides
mechanisms to support the operator in performing connectivity checks, fault
detection, fault verification and isolation, and fault notification per service in
the network domain of interest. Unlike Ethernet OAM defined in IEEE
802.3ah, where the faults are detected and notified on a single point-to-point
IEEE Std. 802.3 LAN, this capability deals with the fault diagnosis at service
layer across networks comprising multiple LANs, including LANs other than
802.3 media. Refer to IEEE 802.1ag for an explanation of CFM. Typically, the
MEP ID and maintenance association levels are assigned by the top level
network service provider.
Dell EMC Networking CFM is available on the N1500/N2200/N3200-ON
series switches. CFM is not compatible with iSCSI optimization. Disable
iSCSI optimization before enabling CFM.
Dell EMC Networking CFM supports the following functionality:
• Path discovery (linktrace message)
• Fault detection (continuity check message)
• Fault verification and isolation (loopback and linktrace messages)
• Fault notification (alarm indication signal or SNMP trap)
ethernet cfm domain
Use the ethernet cfm domain command in Global Configuration mode to
enter into Maintenance Domain Configuration mode for an existing domain.
Use the optional level parameter to create a domain and enter into
maintenance domain Configuration mode. In maintenance domain
Configuration mode, maintenance associations are created and per-
maintenance domain services can be configured. Use the no form of the
command to delete a maintenance domain.
Syntax
ethernet cfm domain domain-name [level 0-7 ]