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Juniper - Ethernet CFM on Physical Interfaces

In Junos OS Release 9.3 and later, CFM also supports aggregated Ethernet interfaces. On interfaces configured on Modular Port Concentrators (MPCs) and Modular Interface Cards (MICs) on MX Series routers, CFM is not supported on untagged aggregated Ethernet member links. MPCs and MICs do support CFM on untagged and tagged aggregated Ethernet logical interfaces.
CFM can be used to monitor the physical link between two routers. This functionality is similar to that supported by the IEEE 802.3ah LFM protocol.

CFM - Configuring Ethernet CFM on Physical Interfaces

Model No. Description
SRX3K-16GE-SFP Juniper Networks 16x1GE SFP CFM for SRX 3000
SRX3K-2XGE-XFP Juniper Networks 2x10GE XFP CFM for SRX 3000
SRX3K-16GE-TX uniper Networks 16x10/100/1000 Copper CFM for SRX 3000