This feature adds support for dual-stack UEs over wlan-gw. Each dual-stack UE appears to WLAN-GW as a bridged client. Dual-stack UE support includes both SLAAC and DHCPv6, with and without linking with DHCPv4. Handling of DHCPv6, RS/RA, and NS/NA messages over wlan-gw has been added. WLAN-GW can assign /128 GUA to the UE via DHCPv6 or assign a /64 prefix in SLAAC to each UE. Each UE can be handed via DHCPv6, a /128 IA_NA from a unique /64 prefix, with the ‟on-link” flag is off in the RA message. This is because the public Wi-Fi users are distinct subscribers, and the communication must always be via WLAN-GW. The CPE must prevent local-switching on the Wi-Fi link even if the /64 prefix is signaled as on-link or if the UEs are handed out /128 from the same /64 prefix.
Existing ESMv6 support on normal group-interface is applicable to wlan-gw group-interface and is already documented in the ESMv6 sections in this guide. There are a few exceptions that are mentioned in following sections.