Hi, Prefixes are given on a perinterface basis. I found that the router itself forms an address with the prefix given. I have the following doubts. a) Can we disable router from forming addresses with prefixes that are given to it? I feel that prefixes are given to an interface by router so that it is advertised to the connected hosts. Iam confused with why the router itself has to form an address with the prefix that it advertises? b) Can a router advertise a global unicast address prefix (say of length 120 bits) to the hosts? the RFC mentions that the prefix length should be in between 4 & 127 bits. But it does not mention about the length in case of global unicast address prefix? Kindly reply. regards ravi prasad __________________________________________________________________ Get your own FREE, personal Netscape Webmail account today at http://webmail.netscape.com/ To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-net" in the body of the message