The "500 Routing Failure" error is seen when backing up the API Gateway using the Gateway Backup Service (*/ssg/backup) via a web browser.
All supported versions of the API Gateway
The API Gateway node does not trust the certificate found on the other node in the cluster.
To prevent this error from occurring and enable a successful backup, the individual gateways must trust the certificate assigned to the port being used for the backup. This can be accomplished by importing the SSL certificate from any of the gateways via the Manage Certificates utility in the CA Policy Manager (previously known as the Layer 7 Policy Manager).
6. Navigate to the API Gateway node where the initial error was encountered and attempt another backup. You should see the backup file ready for download instead of the "500 Routing Failed" error message seen previously.