Windows ISATAP Client, Part 1

Last month I had the opportunity to work with a company to perform an IPv6 pilot.  There are a lot of elements to light up … [Read more...]

When Good NICs Do Bad Things: A Blast of IPv6 Multicast Listener Discovery Queries

This is the write-up of a recent event we experienced on our network.  This will be combination of a  journal of symptoms, … [Read more...]

On Link in IPv6

As an avid reader of RFCs and RFC drafts, I'm always running across little bits of knowledge I either already knew and forgot … [Read more...]

The Cost of IPv6 on Amazon Web Services

AWS is a great platform for businesses that have the technical savvy to administer servers and applications but do not want … [Read more...]

Why Should I Consider IPv6 – Part 2

In Part 1 of this series, we discussed what's wrong with IPv4. Looking at our roadmap again, let's move to the next part of … [Read more...]

Why Should I Consider IPv6?

Network Overlap

A lot of people are talking about IPv6, but I'm using IPv4 and quite content. I have plenty of public addresses. As long as … [Read more...]

In the Lab: Review a few IPv6 Routing Protocols and Encapsulating v6 in v4

Lab1-BaseTopology

I have pseudo-learned and forgotten some IPv6 mechanics over the past couple of years. I have re-visited this cycle recently, … [Read more...]

Unexpected OSPFv3 Virtual-Link Behavior

virtuallinktopol

I came across an interesting question in the Cisco Learning Network forums a couple of weeks ago about OSPFv3 virtual-link … [Read more...]

(Some) Vendors Dig IPv6

Now that World IPv6 Launch is behind us, let's look into how a sampling of network hardware vendors support IPv6 on their web … [Read more...]

Your Firewall Sandwich Gives Me Indigestion

The other day a discussion came up on a security mailing list regarding the proper method for implementing "defense in … [Read more...]

Thank Goodness for NAT66

NAT66 lab

I'm participating in a beta test with my ISP for IPv6 connectivity. The ISP deployed a basic IPv6 service that relies … [Read more...]

Why Your Network Should Go IPv6 Only

ipv4-ipv6-logo

The looming exhaustion of IPv4 address space at the Regional Internet Registries (RIRs) in 2012 will pressure organizations … [Read more...]

A look at the new LSA types in OSPFv3 with Vyatta and Cisco

OSPFv3_new_LSA_1

OSPFv3 brings on a few changes. This post will take a look at the two new LSA types in OSPFv3 using a Cisco and Vyatta … [Read more...]

The IPv6 Forum and the IPv6 Ready Logo Program

I'm reading this blog post over on blogs.cisco.com more because I had not seen this “IPV6 Ready Logo Phase 2 (Gold)” than … [Read more...]

First Hop Redundancy Protocols in IPv6: HSRP + GLBP

IPv6_FHRP_basic_network

Currently Cisco has support for Hot Standby Router Protocol (HSRP) and Gateway Load Balancing (GLBP) in IPv6. There is an … [Read more...]