Alcatel-Lucent 7750 SR - Continuity Check (CC); Figure 29: CFM Continuity Check; Figure 30: CFM CC Failure Scenario

Services
7750 SR OS Services Guide Page 107
Continuity Check (CC)
A Continuity Check Message (CCM) is a multicast frame that is generated by an MEP to its
remote MEPs in the same MA. The CCM does not require a reply message. To identify faults, the
receiving MEP maintains an MEP database with the MAC addresses of the remote MEPs that it
expects to maintain connectivity checking. The MEP database can be provisioned manually or
dynamically built via learning. Only static provisioning is supported. When there is no CCM from
a monitored remote MEP in a pre-configured period, the local MEP raises an alarm.
Figure 29: CFM Continuity Check
Figure 30: CFM CC Failure Scenario
Fig_15
MEP1
MEP1 MEP3MEP2 MEP5
MEP11
MEP4 MEP7
Bridge
Port
MIP
MEP
MEP6 MEP8
MEP10 MEP3
MEP2 MEP12
MEP4
Fig_16
MEP1
MEP1
NMS
Fault
MEP3MEP2 MEP5
MEP11
MEP4 MEP7
Bridge
Port
MIP
MEP
MEP6 MEP8
MEP10 MEP3
MEP2 MEP12
MEP4
NMS