linux.gentoo.user

I'm running sshfs very often and I've noticed the following issue:
whenever the hub/swich(what ever is that keeping my lan together)
suddenly stops working while I'm using sshfs my computer crashes, or if
I;m lucky enough I get to do an umount before everything falls. Is
there any way to prevent this?
Also since this is a lan is there a null encryption algorithm I could
use to speed things up a bit? Or lower the CPU usage?
Thanks!
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