For point-to-point chained networks, you can configure linear multiplexing segments to protect services in point-to-point chained networks.

Prerequisites

Procedure

1. Select "Service > SDH Protection Subnet > Create Multiplexing Segment Linear Protection 1+1" in the main menu to enter the "Create Protection Subnet" page.

   
   

   Description:

   If you want to create a multiplexed segment linear protection M:N, select "Service > SDH Protection Subnet > Create Multiplexed Segment Linear Protection M:N" in the main menu to enter the corresponding creation page.

   
   

2. Enter the name of the protection subnet. You can usually use the default name, for example, Multiplexed Segment Linear Protection 1+1_1.
3. Select the capacity level of the protection subnet. For example: STM-4.
   
   
4. Set the "Recovery Mode" and "Reverse Mode" according to the type of protection and your needs.

   
   

   Note:

   Pay attention when setting the parameters:

   • For multiplexed segment linear protection M:N, you also need to set the number of working links "N". "M" is the number of protection links, which cannot be set, and can only be 1 at present.
   • "Recovery mode" refers to the processing strategy that is used after the faulted line returns to normal. "Non-recovery mode" means that after the faulty line returns to normal, the service is not restored to the primary channel. "Recovery mode" means that after the faulty line is restored to normal, the service is automatically restored to the primary channel.
   • "Reversal mode" means the reversal strategy used when a fault occurs on the line. "Single-ended inversion" means that when a fault occurs at the receiving end, inversion occurs at the receiving end; when a fault occurs at the transmitting end, inversion occurs at the transmitting end, so that the service is protected. "Double-end inversion" means that both the receiving end and the transmitting end are inverted when either the receiving end or the transmitting end fails, so that the service can be protected. The selection of "inversion mode" is only for 1+1 linear multiplexing segment protection. For 1:1 linear multiplexing segment protection, the inversion mode cannot be selected, and its inversion mode is double-end inversion by default.
   • The essence of "resource sharing" is to map the same single board port to multiple protection subnets. When there are multiple protection subnets occupying the same ports of the same single board, "Resource Sharing" must be selected, while for different protection subnets occupying different ports of a single board, "Resource Sharing" does not need to be selected.
   • "Classify according to VC4" means that different VC4s are assigned to different protection subnets, and its function is to realize virtual optical protection. For example, an STM-16 fiber can be divided into the 1st to 4th VC4s belonging to the shared protection of an STM-4 multiplexing segment, and the 5th to 8th VC4s belonging to the unprotected ring.

   
   

5. Select the nodes included in the protection subnet to be created. Double-click on the selected network element in the main topology to add it to the list of nodes on the left, while is displayed on the network element icon (double-click on the network element again to cancel the setting).
6. Click "Next" to enter "Link Selection" to set the parameters of "Working Link" and "Protected Link". physical information of the link, and other parameters.
7. Click Finish to send the configuration. The system pops up the "Operation Result" prompt box, click "Close".
8. Right-click on the protection subnet and select "Protection Subnet Properties".
9. Click the Protected Subnet Maintenance tab to confirm that the Protocol Controller is up.

   
   

   Description:

   If the Protocol Controller is not started, select all network elements of the protection subnet. Right-click and select Start/Stop Protocol > Startup from the pop-up shortcut menu, and click Yes twice in the prompt box to put all Protocol Controllers in the Protocol Startup state. "Protocol Startup" state.

   
   

10. Click the "Protection Subnet Parameters" tab, and set the "Inversion Recovery Waiting Time" and "SD Trigger Condition" as required. Click Apply to send the configuration.

    
    

    Description:

    The "Reverse Recovery Wait Time" setting should be the same for each network element in the same Optix Metro1000 protection subnet.