IPv6 extras

This article relies on the following:

This how-to describes the most common IPv6 tuning scenarios adapted for OpenWrt.
Follow IPv6 NAT or NPT for NAT setup and IPv6 multicast for multicast setup.

Assign only the ULA prefix on the LAN interface.

uci set network.lan.ip6class="local"
uci commit network
service network restart

Announce IPv6 default route for clients using the ULA prefix.

uci set dhcp.lan.ra_default="1"
uci commit dhcp
service odhcpd restart

Prefer IPv6 over IPv4 behind NAT66 for the ULA prefix. Specify an unassigned prefix for ULA.

NET_ULA="$(uci get network.globals.ula_prefix)"
uci set network.globals.ula_prefix="d${NET_ULA:1}"
uci commit network
service network restart

Suppress warnings about missing GUA prefix.

uci set dhcp.odhcpd.loglevel="3"
uci commit dhcp
service odhcpd restart

Disable IPv6 source filter for setups using PBR, NAT or NPT.

uci set network.wan6.sourcefilter="0"
uci commit network
service network restart

Introduction