Chris 🇹🇼 | Telegram 尼有事嗎 says to YSITD
config interface wan option ifname eth1 option proto static option ip6addr 2001:db80::2/64 # Own address option ip6gw 2001:db80::1 # Gateway address option ip6prefix 2001:db80:1::/48 # Prefix addresses for distribution to downstream interfaces option dns 2001:db80::1 # DNS server