FibeAir IP-20C/S/E
User Guide
Ceragon Proprietary and Confidential
Page 317 of 597
Y.1731 Ethernet FM (Fault Management) consists of three protocols that
operate together to aid in fault management:
Continuity check
Link trace
Loopback
Note:
Link trace and Loopback are planned for future release.
IP-20 utilizes these protocols to maintain smooth system operation and
non-stop data flow.
Note:
Support for IEEE 802.1ag is planned for future release.
The following are the basic building blocks of FM:
MD (Maintenance Domain) – An MD defines the network segment for
which connectivity faults are managed via SOAM.
MA/MEG (Maintenance Association/Maintenance Entity Group) – An
MA/MEG contains a set of MEPs.
MEP (Maintenance Association End Points) – Each MEP is located on a
service point of an Ethernet service. By exchanging CCMs (Continuity
Check Messages), local and remote MEPs have the ability to detect the
network status, discover the MAC address of the remote unit/port where
the peer MEP is defined, and identify network failures.
Note:
MIPs (Maintenance Association Intermediate Points) are not
supported in the current release.
CCM (Continuity Check Message) – MEPs in the network exchange CCMs
with their peers at defined intervals. This enables each MEP to detect loss
of connectivity or failure in the remote MEP.