Transition Networks
S4224 Web User Guide
33558 Rev. C
Page 204 of 669
EPS Configuration
The Ethernet (Linear) Protection Switch (EPS) instances are configured from the
Configuration
>
EPS
menu path.
Linear Protection is implemented for maintaining connectivity via alternate path in case the current data
path fails. Two or more parallel instances are configured between ports of a unit pair. Two of the paths
are configured into an Ethernet Protection switching group as a pair of Working-Protecting instances.
By default, the designated Working instance is used for data communication. In case of a failure of the
Working instance, a Protection switch is executed and the Protecting instance then bears the traffic.
The implementation uses mechanisms defined in Ethernet OAM Specifications (ITU-T.Y.1731) for
checking path health. OAM MEPs are configured on instances configured in the Protection Setup
between peer units.
Protection Groups can be configured to support revertive or non-revertive mode (i.e., when the Working
instance has been restored, whether there should be a Protection switch to use the Working instance
again or whether to continue using the Protecting instance).
You can also configure the time to react to instance faults and also to hold for some time between
switches, to increase the efficiency of Protection switching and to avoid intermittent or unstable instance
conditions.
Different protection schemes (1+1, 1:1, 1:N) can be configured as detailed in the sections below.
Note
: Since the protection switching mechanism requires monitoring for both working and protection
transport entities, MEPs must be activated for monitoring the working and protection transport entities.
See the “
SOAM MEP Configuration
” section that follows this section for more information.
When you click the
Add New EPS
button, the Ethernet Protection Switching table display.
The Ethernet (Linear) Protection Switch parameters are explained below.
Delete
This button is used to mark an EPS for deletion in the next Save operation.
EPS ID
The ID of the EPS. Click on the ID of an EPS to enter its configuration page (see below).
Domain
Port
:
This will create an EPS in the Port Domain. 'W/P Flow' is a Port.