If I have a machine with multiple IPs, and I bind a mongod to each ip, I am unable to add the daemons to a replicate set. Attemtps to do a rs.add() or rs.addArb() fails with the "can't find self in new replset config" assertion error.

Three test cases: (assume the mongo data directories are cleaned out before running the test)

Case 1 - success, expected
mongod1: ip1, port 27017
mongod2: ip1, port 27018
mongod3: ip1, port 27019

mongod1:
rs.initiate() -> success
rs.add("ip1:27018") -> success
rs.addArb("ip1:27019") -> success

Case 2 - success, expected
mongod1: ip1, 27017
mongod2: ip2, 27018
mongod3: ip3, 27019

mongod1:
rs.initiate() -> success
rs.add("ip2:27018") -> success
rs.addArb("ip3:27019") -> success

Case 3 failure - unexpected
mongod1: ip1, port 27017
mongod2: ip2, port 27017
mongod3: ip3, port 27017

mongod1:
rs.initiate() -> success
rs.add("ip2:27017") -> failure
rs.addArb("ip3:27017") -> failure

error message

{
"assertion" : "can't find self in new replset config",
"assertionCode" : 13433,
"errmsg" : "db assertion failure",
"ok" : 0
}

The error message is found in db/repl/rs_config.cpp 2.0.1 1.8.4