http://adywicaksono.wordpress.com/2007/11/07/private-ip-address/ Tue, 01 Sep 2009 08:41:45 +0000 http://wordpress.com/ hourly 1 http://adywicaksono.wordpress.com/2007/11/07/private-ip-address/#comment-160 Bogdan Fri, 16 Nov 2007 10:18:46 +0000 http://adywicaksono.wordpress.com/2007/11/07/private-ip-address/#comment-160 The main idea of the IPv6 was to forget about NAT and give the ability for each device in the Net (PCs, mobile phones, tosters, etc) have their own IP. This IP will be reachable from anywhere, because it's "real" IP. Another idea was to reduce routing tables on core routers. It will be similar to phone numbering scheme - prefix defines the geographic position of the host. Currently 2 PC in the same room may have absolutely different IP addresses (if they got them from different ISPs) and this is really ugly :) 2 years ago I wrote <a href="http://www.mib.net.ua/2007/11/master-degree-work.html" rel="nofollow">master degree work</a> about transition to IPv6 mechanisms (it's in ukrainian). But after some analysing I found that there are a lot of unused (reserved in terms of IANA) IP addresses blocks. Just have a look on <a href="http://www.iana.org/assignments/ipv4-address-space" rel="nofollow">IPv4 address space</a>. How could it be that a lot of engg "cries" about absence of IP addresses, when almost 30% of whole address space isn't used? :) Probably that's the answer on question why we still use Private IP Address. The main idea of the IPv6 was to forget about NAT and give the ability for each device in the Net (PCs, mobile phones, tosters, etc) have their own IP. This IP will be reachable from anywhere, because it’s “real” IP. Another idea was to reduce routing tables on core routers. It will be similar to phone numbering scheme – prefix defines the geographic position of the host. Currently 2 PC in the same room may have absolutely different IP addresses (if they got them from different ISPs) and this is really ugly
2 years ago I wrote master degree work about transition to IPv6 mechanisms (it’s in ukrainian). But after some analysing I found that there are a lot of unused (reserved in terms of IANA) IP addresses blocks. Just have a look on IPv4 address space. How could it be that a lot of engg “cries” about absence of IP addresses, when almost 30% of whole address space isn’t used?
Probably that’s the answer on question why we still use Private IP Address.

]]>