"One [college] campus expects that on June 6, 50 percent percent of its network traffic will be IPv6 because its top four most-visited sites are participating in World IPv6 Launch Day," Daigle says. "It might surprise some enterprises how much IPv6 traffic they will see if their users are going to Google, Facebook or Yahoo."
The anticipated surge of IPv6 traffic after June 6 is expected to bring new security threats along with it.
In February Arbor Networks reported the first-ever IPv6-based distributed denial-of-service attacks. While IPv6 security incidents remain rare, experts predict that as more Internet traffic flows over IPv6, DDoS attacks, malware and other threats will follow.
Experts say enterprise network managers should upgrade their DDoS detection, intrusion protection and deep packet inspection systems to support IPv6.
"It's time for the enterprise to make sure that their security devices are IPv6-enabled, that they have the ability to look at IPv6 traffic and to create rules for it and do intrusion detection," advises Bob Hinden, one of the creators of IPv6 and a Check Point fellow. "Most host operating systems -- Windows Vista, 7, Mac OS, Linux, iOS, and Android -- all have IPv6 in them. Even though they may not think they have IPv6 turned on, there might be tunneled traffic coming from outside their enterprise. It's important that the enterprise know what's going on with IPv6 in their network."
Read more about LAN and WAN in Network World's LAN & WAN section.