A new wireless carrier in London, Relish, has announced the deployment of a 4G LTE network. This network is running Carrier Grade NAT to get around problems of IPv4 scarcity. The company announced that they had completed rigorous testing of their CGN implementation...
“But a surprising thing happened: because of workarounds that allow many devices to share one address, IPv4 is still used, even though the number of devices now vastly outnumbers the number of available addresses. Most sites and network operators aren’t even...
We are often asked about the future of the IPv4 market and I will take some time now to discuss that. The IPv4 Market’s Future APNIC and RIPE have virtually exhausted their free pools and have severely limited new allocations. As of this writing, ARIN has about...
A dual-stack transition model was decided upon by the IETF as the appropriate one to use in the transition from IPV4 to IPV6. This was not unreasonable. Since the benefits of NAT (Network Address Translation) started to become apparent around that same time period,...
This article describes how enabling IPv6 in a dual stack environment led to a frustrating inability to send mail through a Microsoft Exchange Server. The troubleshooting of the problem moves through the networking layer of both IPv4 and IPv6 until the application...
