SDH Protection

Hi friend you can try below steps and hope its can help u:

To configure a protection subnet on an MSTP device, perform the following steps:
1. Choose Service > SDH Protection Subnet from the Main Menu. (SDH Protection Subnet is used as an example of the subnet type.)
2. Enter the name of the protection subnet.
3. Select the capacity level of the protection subnet.
4. Select Resource Sharing and Assigned by VC4.
5. Select the nodes that belong to the protection subnet to be created.
6. Set the attribute of each node.
7. Click Next. On the Select Link window that is displayed, set Physical Link Information.
8. Click OK.

Thanks!

Dear friend! 

You can view many documents about protection subnets in the product documentation. I have provided you with the following links:

Configuring a Non-Protection Chain

If a service in the chain does not need to be protected, you can configure a non-protection chain. In this case, all the timeslots in the chain can be used to transmit the service.

Configuring a Non-Protection Ring

When services on a ring do not need protection, you can configure a non-protection (NP) ring. All timeslots on the ring can be used to transmit services.

Creating an MS Ring Protection Subnet

The MS ring protection scheme is adopted in a common ring network. Normally, it is adopted to protect a channel to transmit additional services. By running the APS protocol, it achieves the MS level protection.

Creating a Linear MS Protection Subnet

In a chain network, an NE can protect a service in different sections of the fiber after a linear MS protection subnet is created.

Configuring DNI Protection

You can create DNI protection for the interworking nodes of two rings, and for the protection of the interworking services between two ring networks. The network can be a combination of equipment from different vendors or different protection modes. Moreover, DNI is also available to fiber and node failures.

Thank you!