Thanks again.
Does the 825 support jumbo frames?
I think it does, but it cannot be set in the setup (auto). You also need other jumbo packet enabled devices to make it work. It also seems that the max. packetsize does not need to exceed 4000, but i have verified that (I don't have a use for jp). JP is not a simple enahncer, it can be but it can also cause networking issues.