Maintenance Point Roles
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10.3.3 Continuity Check Messages (CCM)
CCM Messages are multicast messages sent from MEP to MEP at configurable intervals. Loss of continuity is detected after no CCM is
received for 3.5 times the CCM interval.
Note: There can be 4,094 VLANs per port and up to eight maintenance levels. This yields a worst case CCM transmission rate of 9.8
million CCMs per second if 3.3ms interval is used.
Continuity Check Message (CCM)
RDI Flags added in CCM Messages indicates loss of continuity in the remote direction.
CCM Message Format
TX130M+_e-manual_D07-00-051P_RevD00