Thanks. Setting the broadcast address to the external IP address and setting the listen_address to 0.0.0.0 seems to have fixed it. Does that mean that all other nodes, even those on the same local network, will communicate with that node using it's external IP address? It would be much better if nodes on the local network could use the internal IP address and only nodes not on the same network would use the external one.
----- Original Message ----- From: "aaron morton" <aa...@thelastpickle.com> To: user@cassandra.apache.org Sent: Thursday, February 9, 2012 12:42:54 AM Subject: Re: internode communication using multiple network interfaces I have 3 Cassandra nodes in one data center all on the same local network, which needs to replicate from an off site data center. Only 1 of the 3 nodes, called dw01, is externally accessible. If you want to run a multi data centre cluster, all the nodes in both data centers need to be able to connect to each other. When it comes to exposing nodes behind a fire wall broadcast_address can help, see the help in cassandra.yam and https://issues.apache.org/jira/browse/CASSANDRA-2491 Hope that helps. ----------------- Aaron Morton Freelance Developer @aaronmorton http://www.thelastpickle.com On 9/02/2012, at 9:56 AM, Chris Hart wrote: Hi, I have 3 Cassandra nodes in one data center all on the same local network, which needs to replicate from an off site data center. Only 1 of the 3 nodes, called dw01, is externally accessible. dw01 has 2 network interfaces, one externally accessible and one internal. All 3 nodes talk to each other fine when I set dw01's listen_address to the internal IP address. As soon as I set the listen_address to the external IP address, there is no communication between dw01 and other 2 nodes. The other nodes should be able to send to dw01's external IP address (I can telnet from them to dw01 on port 7000 and 7001 just fine), but dw01 obviously would need to use it's internal network interface to send anything to the other 2 nodes. Is this a setup that is possible with Cassandra? If not, any recommendations on how I could implement this? Thanks, Chris
