"When IPv6 is deployed, an ISP must enable legal interception of IPv6 traffic because of legislation. Since this is an extra investment that may hold back massive uptake of IPv6."

This functionality must be implemented when there is a legal obligation for an ISP to offer interception of network traffic. Therefore, either the manufacturer of the equipment needs to upgrade its equipment to support interception of IPv6, or the ISP must consider using equipment from another manufacturer. This will require investments which may not lead to extra revenues. An ISP may circumvent this requirement by tunneling IPv6 traffic over IPv4.