Comments on: Networking 101: More Subnets, and IPv6 http://www.longitudetech.com/networking/networking-101-more-subnets-and-ipv6/ Sun, 13 Jun 2010 23:51:25 +0000 hourly 1 http://wordpress.org/?v=3.0 By: Fast Ethernet Fiber Converter Launched by GAO | Used Test Equipment http://www.longitudetech.com/networking/networking-101-more-subnets-and-ipv6/comment-page-1/#comment-114 Fast Ethernet Fiber Converter Launched by GAO | Used Test Equipment Mon, 15 Mar 2010 23:54:02 +0000 http://www.longitudetech.com/blog/?p=49#comment-114 [...] Networking 101: More Subnets, &#1072&#1495&#1281 IPv6 [...] [...] Networking 101: More Subnets, &#1072&#1495&#1281 IPv6 [...]

]]> By: charlie http://www.longitudetech.com/networking/networking-101-more-subnets-and-ipv6/comment-page-1/#comment-69 charlie Sun, 28 Feb 2010 06:30:20 +0000 http://www.longitudetech.com/blog/?p=49#comment-69 :) As posted on reddit.com too: Great comments! (and "confusing" is only in comparison, to newcomers) There is another, upcoming post, that delves into IPv6. This was just meant to be brief and in the context to introduce the differences. :)
As posted on reddit.com too:

Great comments!
(and “confusing” is only in comparison, to newcomers)

There is another, upcoming post, that delves into IPv6. This was just meant to be brief and in the context to introduce the differences.

]]> By: p1mrx http://www.longitudetech.com/networking/networking-101-more-subnets-and-ipv6/comment-page-1/#comment-68 p1mrx Sun, 28 Feb 2010 06:28:35 +0000 http://www.longitudetech.com/blog/?p=49#comment-68 This article mentions IPv6, but only to say that it's "confusing." The truth is, hexadecimal makes a lot more sense when you're dealing with bitmasks. If CIDR existed when IPv4 was designed, then IPv4 likely would have used hexadecimal as well. Making people memorize 128, 192, 224, 240, 248, 252, 254, and 255 is just cruel. Another notable omission is that IPv6 subnets scale better because ND (neighbor discovery, the replacement for ARP) uses Ethernet multicast. ND defines 2^24 multicast domains, based on the last 3 bytes of the IP address. When a request is sent, only the hosts which have joined that multicast group need to interrupt the CPU. This article mentions IPv6, but only to say that it’s “confusing.” The truth is, hexadecimal makes a lot more sense when you’re dealing with bitmasks. If CIDR existed when IPv4 was designed, then IPv4 likely would have used hexadecimal as well. Making people memorize 128, 192, 224, 240, 248, 252, 254, and 255 is just cruel.

Another notable omission is that IPv6 subnets scale better because ND (neighbor discovery, the replacement for ARP) uses Ethernet multicast. ND defines 2^24 multicast domains, based on the last 3 bytes of the IP address. When a request is sent, only the hosts which have joined that multicast group need to interrupt the CPU.

]]>