Hi, I am looking at /usr/include/bits/in.h in glibc 2.2.2, lines 59-61: #define IP_DEFAULT_MULTICAST_TTL 1 #define IP_DEFAULT_MULTICAST_LOOP 1 #define IP_MAX_MEMBERSHIPS 20 How were these values chosen? Are they based on some kernel parameter limitations? Thanks. -- Craig Rodrigues http://www.gis.net/~craigr rodrigc@mediaone.net