+:command:`ms_mode=<legacy|crc|secure|prefer-crc|prefer-secure>`
+ Set the connection mode that the client uses for transport. The available
+ modes are:
+
+ - ``legacy``: use messenger v1 protocol to talk to the cluster
+
+ - ``crc``: use messenger v2, without on-the-wire encryption
+
+ - ``secure``: use messenger v2, with on-the-wire encryption
+
+ - ``prefer-crc``: crc mode, if denied agree to secure mode
+
+ - ``prefer-secure``: secure mode, if denied agree to crc mode
+