This section applies to the 7750 SR and 7450 ESS. However, only the facility MEP has an IOM-specific requirement. SAPs and ports that are not configured as part of facility MEPs are not restricted to a specific IOM. For example, a Tunnel MEP would be required to meet the minimum IOM requirement, similar to the fated shared service SAPs. However, the mate or egress SAP or binding is not required to meet the facility MEP requirement. Of course, there may be other reasons why a mate SAP or binding requires specific IOM/IMM that are outside that of facility MEPs. Similarly, a LAG MEP requires all port members to meet the IOM/IMM requirements for facility MEPs.
Table: Facility MEP support overview provides an overview of Facility MEP support.
| Port MEPs | Tunnel MEPs | LAG MEPs | Router MEPs | ||
|---|---|---|---|---|---|
| Port | LAG | ||||
Sub Second |
Yes |
Yes |
Yes |
Yes |
Yes |
Port: |
|||||
Hybrid Network Access |
Dot1q/QinQ Null/Dot1q Null/Dot1q/QinQ |
QinQ no QinQ |
QinQ no QinQ |
Dot1q/QinQ Null/Dot1q Null/Dot1q/QinQ |
Dot1q/QinQ Null/QinQ N/A |
CCM |
Yes |
Yes |
Yes |
Yes |
Yes |
Y.1731 PM Tools |
Yes |
Yes |
Yes |
Yes |
Yes |
AIS Reception |
— |
Yes |
Yes |
— |
— |
Facility Fault |
Controls port operational state Failure=Link Up Success=Up |
Controls shared fate service SAPs and Epipe AIS |
Controls Shared fate service SAPs and Epipe AIS |
Controls LAG operational state Failure=Oper: down, Success=Oper=up |
Controls IP interface operational state in reaction to CFM state |
Mutually Exclusive |
Mutually Exclusive |
||||
Sub-second CCM-enabled MEPs are platform-specific and may not be supported uniformly on the 7750 SR, 7450 ESS and 7950 XRS platforms. For those 7750 SR, 7450 ESS and 7950 XRS platforms which support sub-second CCM-enabled MEPs, this additional restriction is applied; QinQ tunnel MEPs require a minimum of SF/CPM3.