Lightweight DS-Lite

DS-Lite, or Dual-Stack Lite (RFC6333),is a solution to deal with the IPv4 exhaustion problem once an IPv6 access network is deployed. It enables unmodified IPv4 application to access the IPv4 Internet over the IPv6 access network. In the DS-Lite architecture, global IPv4 addresses are shared among subscribers in the AFTR, acting as a Carrier-Grade NAT (CGN). At ISC, our team would like to introduce a faster, and lighter, implementation of DS-Lite; called Lightweight DS-Lite (LWDS-Lite).

LWDS-Lite is a new version of AFTR that supports Stateless Deterministic NAT (SD-NAT).

Based on ISC DHCP 4.2.0 and ISC AFTR 1.1, LWDS-Lite supports:

  • TSV (Transfer Services Network) mode; enabling the ability to support IPv4 requests over IPv6
  • DHCPv6  Relay Agent
  • AFTR options
  • B4 code implementation in:
    • OpenWRT; with custom ISC DHCP packages for the WRT3700 and WRT 3800 chipsets
    • Ubuntu: Detailed set of instructions on how to set it up (under Links and Resources)

At this time, ISC regrets that we do not have the resources to offer support or training on the LWDS-Lite software.