FreeBSD & FIBs (setfib) - How to modify?

[Brent Bloxam]

Nikos Vassiliadis wrote:
  > Just start a shell in FIB 10 and every command forked from
> that shell will be bound to FIB 10.
> setfib 10 csh
> ... do some work
> exit
> you're back in FIB 0.
> 
> HTH, Nikos

Thanks Nikos, I didn't want to assume setfib was the only method of 
modifying them (whether through directly using a utility or dropping 
into a shell under it). The man pages make no mention of how to actually 
change the other route tables, the handbook doesn't mention FIBs in any 
capacity, etc, so thought I would clarify here