Cross-resource constraints lead to failure of low-order service creation

When expanding services in the existing network, care should be taken to first check whether there are sufficient cross resources.

Products

OptiX OSN 3500

Failure category

Other

Description

The customer adds several VC-12 services on the OSN 3500 running in the existing network. After the service configuration is issued, the network management reports the message "There are not enough high-order channels on the low-order cross board for the low-order services (error code: 38882 )", and the new services are not activated.

Cause Analysis

Possible causes are as follows:

Cause 1: Crossboard software mismatch

Cause 2: Cross Matrix Error

Cause 3: Configuration error

Cause 4: Crossover capacity limitation

Operation Procedure

Check that the cross-board software is consistent with the matching table to eliminate possible cause 1.

Perform a master-standby reversal on the crossover board, the fault is not eliminated, rule out possible cause 2.

Check the network element crossover configuration and find that: you can can create new VC-12 services on the existing VC-4 service layer path, but you cannot create VC-12 services on the newly created VC-4 service layer path. Rule out possible cause 3.

Therefore the probable cause of this failure is that the cross-board has reserved 63VC-12 resources for the existing VC-4 service layer paths, and there are not enough low-order resources available for the newly created VC-4 service layer paths.

Optimize the service configuration to reduce the number of VC-4 service layer paths and make full use of the crossover resources.