When service expansion is required on the existing network, check and ensure that the cross-connect resources are sufficient.
Symptom
The customer needs to add several VC-12 services to the OptiX OSN 3500 in service on the existing network. After the service configuration is delivered, the NMS returns a message indicating that the lower order cross-connect board cannot provide sufficient higher order paths for the lower order service. The error code is 38882. As a result, the added services are in inactive state.
Cause Analysis
The possible causes are as follows:
- Cause 1: The software version of the cross-connect board does not match with the version specified in the mapping table.
- Cause 2: The cross-connect matrix is incorrect.
- Cause 3: The configuration is incorrect.
- Cause 4: The cross-connect capacity is limited.
Procedure
- Check and ensure that the software version of the cross-connect board matches with the version specified in the mapping table. Thus, cause 1 can be excluded.
- Switch the active and standby cross-connect boards, and the fault persists. Thus, cause 2 can be excluded.
- Check the cross-connect configuration of the NE, and find the following phenomenon: VC-12 services can be created on an existing VC-4 server trail, rather than on a new VC-4 server trail. Thus, cause 3 can be excluded.
- The most probable cause of the fault is as follows: The cross-connect board reserves 63 VC-12 resources for the existing VC-4 server trails. After new VC-4 server trails are added, lower order resources are insufficient for use.
- Optimize the service configuration and reduce the number of VC-4 server trails, to make optimal use of cross-connect resources.
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