User Guide for FibeAir® IP-20 All-Outdoor Products, CeraOS 10.5
Page 714 of 825
Ceragon Proprietary and Confidential
22.9.3.1
SOAM Overview (CLI)
The Y.1731 standard and the MEF-30 specifications define Service OAM (SOAM).
SOAM is concerned with detecting, isolating, and reporting connectivity faults
spanning networks comprising multiple LANs, including LANs other than IEEE
802.3 media.
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 is planned for future release.
IP-20 utilizes these protocols to maintain smooth system operation and non-stop
data flow.
The following are the basic building blocks of FM:
•
MD (Maintenance Domain)
–
An MD defines the management space on a
network, typically owned and operated by a single entity, for which
connectivity faults are managed via SOAM.
•
MA/MEG (Maintenance Association/Maintenance Entity Group)
–
An
MA/MEG contains a set of MEPs or MIPs.
•
MEP (MEG End Points)
–
Each MEP is located on a service point of an Ethernet
service at the boundary of the MEG. 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.
•
MIP (MEG Intermediate Points)
–
Similar to MEPs, but located inside the MEG
and can only respond to, not initiate, CCM messages.
•
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.
22.9.3.2
Configuring MDs (CLI)
In the current release, you can define one MD, with an
MD Format
of
None
.
To add an MD, enter the following command in root view:
root> ethernet soam md create md-id <md-id> md-format none md-
name <md-name> md-level <md-level>
Note:
Support for MDs with the MD format Character String is planned for
future release. In this release, the software enables you to configure
such MDs, but they have no functionality.
The following command creates MD 5, named TR-988 with maintenance level 5.
root> ethernet soam md create md-id 5 md-format none md-name
TR-988 md-level 5
