Dual-Stack Lite (DS-Lite)

DS-Lite employs IPv4-over-IPv6 tunnels to cross an IPv6 access network to reach a carrier-grade IPv4-IPv4 NAT. This facilitates the phased introduction of IPv6 on the Internet by providing backward compatibility with IPv4.

DS-Lite running on MS-MPCs or MS-MICs does not support the following features, which are supported on MS-DPCs:

• ALGs
• Limitations per subnet
• Clearing NAT mappings and flows for a specific subscriber, for a basic bridging broadband device (B4), or for a specific service set
• Port Control Protocol