Cassandra nodes using internal network to try and talk externally

Hi, I have a Cassandra 2.2.5 cluster with a datacenter DC03 with 5 nodes in a ring and I have DC04 with one node. Setup by default with all nodes talking on the external interfaces works well, no problems, all nodes in each DC can see and talk to each other. I’m trying to follow the instructi

SizeTiered to Leveled Compaction runs out of RAM

We run a fairly small production Cassandra 2.2.4 cluster with 5 nodes on Rackspace VMs, (4 cores, 4GB RAM, SSD backed) and whilst these nodes are on the small side, day to day it has kept up with our workload fine. We currently use SizeTieredCompactionStrategy and want to move to the LeveledS