IPv6 tunnel configuration: ioctl: No such device

[andersk]

On my Gargoyle 1.5.4 router (MZK-W04NU), I’m trying to configure an IPv6 tunnel from tunnelbroker.net, using these directions that they provide for OpenWRT Backfire 10.03.1:

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opkg update
opkg install 6in4

uci set network.henet=interface
uci set network.henet.proto=6in4
uci set network.henet.peeraddr=209.51.161.14
uci set network.henet.ip6addr='2001:470:1f06:33b::2/64'
uci set network.henet.tunnelid=162477
uci set network.henet.username=tb4fcee04b1e2e42.89446075
uci set network.henet.password='YOUR_PASSWORD'
uci commit network

uci set firewall.@zone[1].network='wan henet'
uci commit firewall

ifup henet
/etc/init.d/firewall restart

But I get this error:

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root@Gargoyle:~# ifup henet
ioctl: No such device
Cannot find device "6in4-henet"
Cannot find device "6in4-henet"
Cannot find device "6in4-henet"
Cannot find device "6in4-henet"

Using sh -x, I found that the problem occurs on this line of /lib/network/6in4.sh:

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root@Gargoyle:~# ip tunnel add 6in4-henet mode sit remote 209.51.161.14 local 76.118.179.199 ttl 64
ioctl: No such device

Anyone know how to make this work?