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After primarily evaluation we run tulip from command line and test the added nodes for their ping servers. The complete test contains 107 sites to be traced by TULIP client. This generates the log file with all the successful and failing landmarks.
tulip-log-analyze.pl
The purpose of this script is to parse the log file and provide us a hawk eye view of the landmarks which are failing or are successful . We then disable all those nodes which do not reply to requests by reflector.cgi. This script also generates the total delay/time taken by each landmark to respond. We will use this parameter for the final selection of our tier 0 landmarks.