Hi Simon, I saw this right now [0]. This is how an eui48 is converted to eui64. But we have already a neui64. Are you sure this code check on this? Normally it should check if the dev addr_len is 64 bit long, then it's a eui64 address. I don't see any test on this. That's why it works on a ethernet device and not on a 802.15.4 lowpan device type. - Alex [0] https://github.com/smee204/unstrung/blob/all_fixes/lib/libndmgmt/iface.cpp#L91 -- To unsubscribe from this list: send the line "unsubscribe linux-wpan" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html