6rd is an improvisation on the motive of 6to4 and ISATAP: you have IPv4 prefix which you use as a carrier for the tunneled traffic, the synthesized IPv6 address

6rd is an improvisation on the motive of 6to4 and ISATAP: you have IPv4 prefix which you use as a carrier for the tunneled traffic, the synthesized IPv6 addresses have a part within them that allows to know which IPv4 within your domain to forward the tunneled traffic to. If the IPv6 is outside of your 6rd domain - then the tunneled traffic is sent to the border relay, which decapsulates it and sends to the rest of the IPv6 internet. More details are in http://tools.ietf.org/html/rfc5969 http://tools.ietf.org/html/rfc5969 if you are interested. Should be implementable with the firmware upgrade - assuming the memory allows for IPv6 code altogether - and, that the supplier decides to do the update (as opposed to shipping a new model). A whole lot of el-cheapo boxes are supported by openwrt: http://wiki.openwrt.org/toh/start http://wiki.openwrt.org/toh/start And there exists a 6rd-enabled image: https://forum.openwrt.org/viewtopic.php?pid=123059 https://forum.openwrt.org/viewtopic.php?pid=123059 So it is not all that catastrophic, IMO.