Details
Description
We use a 3.4 mongos to add a 3.2 shard and expect success here: https://github.com/mongodb/mongo/blob/96d6fcb0c18e7d3e99bce7877714e32ed1313bbf/jstests/multiVersion/set_feature_compatibility_version.js#L289.
We use a 3.4 mongos to add a 3.2 shard and expect success here: https://github.com/mongodb/mongo/blob/96d6fcb0c18e7d3e99bce7877714e32ed1313bbf/jstests/multiVersion/set_feature_compatibility_version.js#L289.