Hi, I got an ayiya tunnel terminated on an openwrt box. It works quite well so far but the performance isn't as good as one would except : I can't get more than 500KB/sec and when the ipv6 traffic exceeds 350kB/sec, the 4 aiccu processes eat more than 60-70% of the CPU. (I can get ~3MB/sec with ipv4/nat and 8MB/sec with the bridge module on this box and I *think* it has a 266Mhz MIPS CPU) I read in the AYIYA specification that each packet must be signed with either md5 or sha, which could explain such a high CPU load. Is there any way to disable this signing mechanism? As far as I know, 6in4 tunnels aren't signed anyway, so it shouldn't be a big deal security-wise. Does anybody know if an in-kernel implementation of the ayiya protocol exists? I haven't found anything on this subject. Would it be hard to do? Would there be major drawbacks? (mainly portability, I guess) This could help reducing the load too and increase performance, by avoiding multiple user space to kernel space copy operations.