Welcome to the ZyXEL Networking Glossary - your definitive source for descriptions of networking terms and ZyXEL's product features.
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A CFM domain is a group identified by an MD level and an MA VLAN ID. For example, ports in MD level 1 and MA VLAN 2 are in the same CFM domain while ports in MD level 7 and MA VLAN 2 are in another CFM domain. See also MD and MA.