Can you check if the ports are open and you are able to communicate?
UNKNOWN-DC is printed when it is not gossiping with the other node.
I would check the security group settings and verify if the telnet to the
targe port is working as expected.

Regards,
</VJ>



On Thu, Mar 8, 2012 at 11:41 AM, Todd Nine <todd.n...@gmail.com> wrote:

> Hi all,
>   I've recently upgraded a test cluster from 0.8.x to 1.0.8 for testing
> multi data center communications.  I have the following configuration file
> on 3 nodes in a single data center.
>
> https://gist.github.com/4671e4ae562a47f96ed2
>
> However, when I run node tool on any of these nodes, they recognize the
> others are up, but no data is available.
>
>
> nodetool -h localhost ring
> Address         DC          Rack        Status State   Load
>  Owns    Token
>
>      113427455640312821154458202477256070485
> 10.172.106.192  UNKNOWN-DC  UNKNOWN-RACKDown   Normal  ?
> 33.33%  0
> 50.18.3.222     us-west     1c          Up     Normal  3.95 GB
> 33.33%  56713727820156410577229101238628035242
> 10.172.134.239  UNKNOWN-DC  UNKNOWN-RACKDown   Normal  ?
> 33.33%  113427455640312821154458202477256070485
>
> If I remove the broadcast_address from the yaml, everything works fine,
> but I can't communicate across data centers.  Any ideas why I'm getting
> this error?  The listen_address is the private ip, and the
> broadcast_address is the public ip.
>
> Thanks,
> Todd
>

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