nodetool join 

Causes the node to join the ring.

Causes the node to join the ring.

Synopsis 

$ nodetool <options> join
DataStax Enterprise 5.0 Installer No-Services and tarball installations:
installation_location/resources/cassandra/bin
Options
Short Long Description
-h --host Hostname or IP address.
-p --port Port number.
-pwf --password-file Password file path.
-pw --password Password.
-u --username Remote JMX agent username.
-- Separates an option from an argument that could be mistaken for a option.

Description 

Causes the node to join the ring, assuming the node was initially not started in the ring using the -Djoin_ring=false cassandra utility option. The joining node should be properly configured with the desired options for seed list, initial token, and auto-bootstrapping.