I am trying to configure a replica set with three nodes: node A, B and C. I execute the rs.add()'s from node A and after that rs.status() shows that the three nodes are PRIMARY. Moreover node B and C have 0 pingMs. If I execute rs.status() from node B or C the only node listed is the self (As PRIMARY). I tried adding an arbiter but it didn't work (it behaved as the nodes B and C). I think this can be a networking problem but I can't figure it out.

Edit: This is the output for netstat -anp|grep 27017:

tcp        0      0 0.0.0.0:27017           0.0.0.0:*               LISTEN      -
tcp        0      0 10.0.1.211:55772        10.0.1.213:27017        TIME_WAIT   -
tcp        0      0 127.0.0.1:50509         127.0.0.1:27017         ESTABLISHED -
tcp        0      0 127.0.0.1:27017         127.0.0.1:50509         ESTABLISHED -
tcp        0      0 10.0.1.211:55774        10.0.1.213:27017        TIME_WAIT   -
tcp        0      0 10.0.1.211:55776        10.0.1.213:27017        ESTABLISHED -
tcp        0      0 10.0.1.211:39180        10.0.1.212:27017        ESTABLISHED -
tcp        0      0 10.0.1.211:39178        10.0.1.212:27017        TIME_WAIT   -
tcp        0      0 10.0.1.211:39176        10.0.1.212:27017        TIME_WAIT   -
unix  2      [ ACC ]     STREAM     LISTENING     3291267  -                   /tmp/mongodb-27017.sock

the private ips for the node B and C are 10.0.1.212 and 10.0.1.213 respectively (they appear to have an established connection in the 27017 port according to the netstat output).