Archived; click post to view.
Excerpt: Now we arrive at the question of how much address space to allocate for…anyone. You may be a service provider, you may be a business, you may be a home user. Today, this question is quite easy to solve. If you’re a business-class customer, you ask your ISP for a block of addresses, and based off of your need (or ability to justify the need), you’ll be allocated some addresses. For many small-to-medium businesses, this can be as small as 8, or even 4 addresses. Let’s face it – in light of the current availability of globally routable IPv4 addresses,…
Assigning IPv6 Prefixes for Customers
February 25, 2013 by 10 Comments
A /64 On Every Link? Are You Crazy?
February 25, 2013 by Leave a Comment
Archived; click post to view.
Excerpt: I’ve had some great conversations lately with a lot of folks on the topic of IPv6 prefix length in a variety of applications, specifically one very good discussion on just about anything IPv6 between me, the kind folks over at The Class-C Block and Tom Hollingworth (aka The Networking Nerd). For many folks that are considering the impact of going dual-stack in their environments, the idea of using a /64 on all links is still a point of contention. This becomes a religious debate when this argument is centered around point-to-point (2 host) links. After all – on paper, using a subnet length…
[IPv6] Subnetting – Wait, we still need to do that?
January 11, 2011 by 3 Comments
Archived; click post to view.
Excerpt: Subnetting, in short, can be thought of as an adjustable “slide rule” that tells the network infrastructure the logical size of a sub-network, or subnet. This is useful if you know how many IP addresses you’ll to suit the needs of a predetermined number of PCs, so you can plan the size of your subnets to match that requirement. With IPv4, subnet masks are used to determine how big the subnets are. A standard IPv4 address requires 32 bits to describe it. These are commonly seen in the following format: 192.168.0.1 You’ve probably also seen these addresses accompanied by their “subnet masks”. A…
