Hadoop distributed mode

[Mark]

 I am trying to configure out distributed Hadoop setup but for some 
reason my datanodes can not connect to the namenode.

2010-09-06 04:06:05,040 INFO org.apache.hadoop.ipc.Client: Retrying 
connect to server: /10.101.102.11:9000. Already tried 0 time(s).
2010-09-06 04:06:06,041 INFO org.apache.hadoop.ipc.Client: Retrying 
connect to server: /10.101.102.11:9000. Already tried 1 time(s).
2010-09-06 04:06:07,042 INFO org.apache.hadoop.ipc.Client: Retrying 
connect to server: /10.101.102.11:9000. Already tried 2 time(s).
2010-09-06 04:06:08,042 INFO org.apache.hadoop.ipc.Client: Retrying 
connect to server: /10.101.102.11:9000. Already tried 3 time(s).
2010-09-06 04:06:09,043 INFO org.apache.hadoop.ipc.Client: Retrying 
connect to server: /10.101.102.11:9000. Already tried 4 time(s).
2010-09-06 04:06:10,043 INFO org.apache.hadoop.ipc.Client: Retrying 
connect to server: /10.101.102.11:9000. Already tried 5 time(s).
2010-09-06 04:06:11,044 INFO org.apache.hadoop.ipc.Client: Retrying 
connect to server: /10.101.102.11:9000. Already tried 6 time(s).
2010-09-06 04:06:12,044 INFO org.apache.hadoop.ipc.Client: Retrying 
connect to server: /10.101.102.11:9000. Already tried 7 time(s).
2010-09-06 04:06:13,045 INFO org.apache.hadoop.ipc.Client: Retrying 
connect to server: /10.101.102.11:9000. Already tried 8 time(s).
2010-09-06 04:06:14,045 INFO org.apache.hadoop.ipc.Client: Retrying 
connect to server: /10.101.102.11:9000. Already tried 9 time(s).
2010-09-06 04:06:14,048 ERROR 
org.apache.hadoop.hdfs.server.datanode.DataNode: java.io.IOException: 
Call to /10.101.102.11:9000 failed on local exception: 
java.net.NoRouteToHostException: No route to host

I also can't connect to master-hadoop:50070 or master-hadoop:50030 from 
any other machine but the master/name node. Any ideas why this may be 
happening?

Thanks.