You can make your named network services available via IPv6 with a few simple steps.  First, your DNS server or DNS service provider should first hand out AAAA DNS records (pronounced quad-A record) which map hostnames to IPv6 addresses.  Second, you should provide PTR records to allow IPv6 Reverse DNS (rDNS) lookups.  Finally, you should take steps to make the DNS server itself reachable via IPv6. Setup your DNS Server to start serving AAAA rec…

Read More >>

Tags: AAAA, CNR, dns, IPv6, network infrastructure, PTR

The 2012 North American IPv6 Summit was held in Denver, Colorado on April 9-12, 2012.  As usual, it was an excellent conference with the largest attendance of any IPv6 event in North America this year.  There were many excellent speakers who gave timely talks on the state of IPv6 deployment, gaps in the overall education within the end-user base as well as advances and limitations in vendor support. I gave a keynote talk on “Enterprise Int…

Read More >>

Tags: 2012 North American IPv6 Summit, Cisco Validated Designs, CVDs, internet edge design, IPv6, IPv6 deployment, Rocky Mountain IPv6 Task Force, Shannon McFarland

…have been developed for encoding an IPv4 address inside of an IPv6 address. For instance, to maintain backward compatibility with IPv4, RFC 4291 defines both IPv4-compatible and IPv4-mapped addresses (both types begin with 80 0′s) to provide a direct mapping for IPv4 addresses in IPv6. Various tunneling protocols such as ISATAP, 6to4, and Teredo also encode the IPv4 address in the IPv6 address. ISATAP Intra-Site Automatic Tunnel Addressing…

Read More >>

Tags: IPv6-security

As we approach the much talked about World IPv6 Launch on June 6th, 2012 it is important to help as many as possible do what is needed to prepare their own Internet Edge to not only participate in the launch but also to ensure business continuity regardless of which IP version is used.  Start now so you don’t have to rush your deployment at the end. There are important first steps to take before you ever type the first command or click th…

Read More >>

Tags: Cisco ACE, Cisco Validated Designs, IPv6, server load balancing, Shannon McFarland, World IPv6 Launch

My last post was all about finding IPv6 prefixes on the IPv6 Internet. I think the next natural question is “What about IPv6 traffic?” or more specifically, “What about IPv6 traffic on my network?” In this post, I’ll talk about some network tools, or instrumentation, that can be used to find and measure IPv6 traffic that is out on your network. Network instrumentation is going to be important whether you plan to integrate IPv6 into your network…

Read More >>

Tags: ACLs used to identify IPv6, Cisco Services, IDS/IPS for IPv6 identification, IPv6, IPv6 discovery with QoS policy, IPv6 on Switching, IPv6 Traffic, netflow, SNMP MIB