Starting in NSX-T version 3.2.1 the following API is available to clean up stale Edge entries from the NSX Manager:
Method: POST
URI: https://<nsx-mgr>/api/v1/transport-nodes?action=clean_stale_entries
If POSTMAN is not available, use below curl command from root user on NSX Manager that has VIP assigned:
# curl -u admin -k -X POST https://127.0.0.1/api/v1/transport-nodes?action=clean_stale_entries
If you believe you have encountered this issue and the noted workaround is not an option, please open a support case with Broadcom Support and refer to this KB article.
For more information, see Creating and managing Broadcom support cases.