private void addUnknownHost(Set<String> remoteLocators) {
    String unknownHostName = "unknownGeodeHostWanAutoDiscoveryDUnitTest";
    boolean unknownHostFound = false;
    int numTries = 10;
    for (int i = 0; i < numTries; i++) {
      try {
        InetAddress.getByName(unknownHostName);
      } catch (UnknownHostException e) {
        unknownHostFound = true;
        break;
      }
      unknownHostName = "_" + unknownHostName + "_";
    }
    assertTrue("An unknown host name could not be found in " + numTries + " tries",
        unknownHostFound);

    remoteLocators.add(unknownHostName + "[12345]");
  }
Test to validate that TK site's locator is recognized by LN and NY. Test to validate that HK
site's locator is recognized by LN , NY, TK.
geode-wan/src/distributedTest/java/org/apache/geode/internal/cache/wan/misc/WanAutoDiscoveryDUnitTest.java