One Network Architect's View of Life, the Internet, and Everything
From the category archives:
We (the Global Network Engineering Community(GNEC)) have made many mistakes with IPv4 Peering and Transit configurations and operational practices. As operators begin turning up more and more IPv6 E-BGP sessions with peers and transit providers, there is an opportunity to do things right from the beginning.
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As with IPv4, an IPv6 address serves as an identifier for an interface or group of interfaces. Also like IPv4, IPv6 addresses come in several types, based on how they represent those interfaces. IPv6 has three types of addresses. This post covers all three, plus some special purpose addresses as well.
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The primary difference between IPv4 and IPv6 addresses is length. IPv4 addresses are 32 bits long and IPv6 addresses are 128 bits long. This means that an IPv4 address is made up of 32 1s and 0s while an IPv6 address is made up of 128 of them – 128 binary digits. This massive length forces IPv6 addresses to be written using a different notation than IPv4 addresses and thus makes them very easy to distinguish from IPv4 addresses.
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As a member of the ARIN Advisory Council (AC), I have to stay up to date on all of the goings on in the world of ARIN policy development (that’s kind of the point of the AC). These policy changes affect many people but are fairly hard to keep track of for most (most engineers [...]
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Since I’m starting to speak more publicly and more often, I thought I’d throw out a schedule so that folks will know where I’ll be. So, to kick that off, here is my next 3 months of speaking engagements: LACNIC XVI / LACNOG 2011 / Internet ON 3 to 7 October 2011 Buenos Aires, Argentina [...]
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The American Registry for Internet Numbers (ARIN) announced today (27 September 2011) the publication of ARIN Number Resource Policy Manual (NRPM) version 2011.4. As an active member of the ARIN community and an elected member of the ARIN Advisory Council (AC), I am always excited to see new policies implemented (yes, I’m a special breed [...]
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The 2011 Rocky Mountain IPv6 Summit was held in Denver earlier this week (25-27 April) at the Grand Hyatt. It was a great event, as we have come to expect from the Rocky Mountain IPv6 Task Force. I was especially pleased that they stepped the presentation content up a notch with regard to technical depth [...]
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Day One: Advanced IPv6 Configuration is a sequel to my first book, Day One: Exploring IPv6, and picks up right where it left off. Namely with BGP. In addition to a fairly thorough look at BGP (iBGP and eBGP / native IPv6 peering and sharing IPv6 routes over IPv4 peering), the book jumps into a few of the additional and often overlooked aspects of deploying an IPv6 network. This includes a look into topics and tools including VRRP, ICMPv6 rate limiting, CoS, IPv6 path MTU discovery, DHCPv6, zero hop-limit, Multicast Listener Discovery (MLD) and Duplicate Address Detection (DAD).
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