We have three node cluster in the same datacenter configured using private ip and every thing is working fine . We wanted to add the DR for this node.When we try to add the node using seed node as public-IP we are getting error as
ERROR [main] 2017-12-04 02:35:12,329 CassandraDaemon.java:747 - Exception encountered during startup java.lang.RuntimeException: Unable to gossip with any seeds
Can someone help me with adding the node to the cluster which is on different data center?