Selection of the SNCP protection type during configuration of the ODUk SNCP protection on TOM boards

26

1. SNC/I: SNC protection for inherent monitoring
(1) Description: This method protects services (for example, server-layer trails and server/ODUk adaptation) against defects detected on the ODUk link. No defect detection is performed at the ODUk layer itself. Connections are indirectly monitored by using the data that is inherently available from the server-layer network.
(2) Application scenario:
a. The subnet that ODUk signals traverse does not have an electrical regeneration site.
b. The tributary boards can receive any client-side services.
2. SNC/N: SNC protection for non-intrusive monitoring
(1). Description: This method protects services against defects detected at the E2E ODUk path (ODUkP) layer or ODUk TCM (ODUkT) sub-layers. Defect detection is performed at the ODUk layer itself. The connections are directly monitored by use of listen-only (non-intrusive) monitoring of the original characteristic information.
(2) Application scenario:
a. No limit is set on the type of sites in the subnet where ODUk signals traverse.
b. In case of SNC/N (PM), it is recommended that tributary boards receive non-OTN services. In case of SNC/N (TCM), tributary boards can receive any client-side services.
3. SNC/S: SNC protection for sub-layer monitoring
(1) Description: This method protects services against defects detected at the TCM sub-layer (ODUkT) of the ODUk protection. Switching can be triggered only by defects of the protected domain. An ODUk fault cannot trigger protection switching.
(2) Application scenario:
a. No limit is set on the type of sites in the subnet where ODUk signals traverse.
b. Tributary boards can receive any client-side services.

Other related questions:
Precautions for selecting the SNCP type during ODUk SNCP configuration
When configuring ODUk SNCP protection, you are advised to set the SNCP type to SNC/N to enable non-intrusive monitoring on both the source and sink ends of the protection group. This setting facilitates network monitoring. In cascading or nested protection scenarios, however, you are advised to set the SNCP type to SNC/S.

ODUk SNCP protection of the SNC/I type
ODUk SNCP (SNC/I) protects services against defects detected at the ODUk link connection (such as server layer trails and server/ODUk adaptation functions). It does not detect defects at the ODUk layer itself. Connections may be indirectly monitored by using the data that is inherently available from the server layer network.

ODUk SNCP protection of the SNC/N type
ODUk SNCP (SNC/N) protects services against defects detected at the ODUk path (ODUkP) layer or ODUk TCM (ODUkT) sub-layers in E2E mode. It detects defects at the ODUk layer itself. The connection may be directly monitored by use of listen-only (non-intrusive) monitoring of the original characteristic information.

Principles of ODUk SNCP protection
Generally, ODUk SNCP protection needs to be configured using one tributary board and two line boards to implement dual feeding and selective receiving of ODUk services in the OTN network.

Switching time of ODUk SNCP protection
The switching time of ODUk SNCP protection cannot exceed 50 ms, excluding the detection time.

If you have more questions, you can seek help from following ways:
To iKnow To Live Chat
Scroll to top