In IMS8.1 system, HSS and ENS are configured on the same BE. And HSS version is V900R008C01SPC200, ENS version is V900R001C01SPC100, USCDB version is V100R002C03SPC300. Now we need to upgrade ENS to V900R001C02. Could this upgrade be done completely following the upgrade guide?
No. In USCDB, four nodes are configured in one cluster, and more than one node is configured in one cluster of the same board. The USCDB does not support the plane division configuration, which would cause the upgrade failed occasionally. To ensure the upgrade successful, we must upgrade the ENS following the workaround in the attachment.