Natively, DRCP supports connection tagging, which is a single label without weights. So, labeling with single label works transparently if you use UCP with DRCP. Multiple label UCP connections work, but they have the following behavior changes:
The cost method in the ConnectionLabelingCallback API is not invoked if you use UCP with DRCP using connection labeling
UCP can invoke the configure method in the ConnectionLabelingCallback API more with DRCP configuration than without DRCP configuration.
See Also:
Oracle Database JDBC Developer's Guide for more information about DRCP