🚀 go-pugleaf

I have a scenario that is probably similar to 90% of the rest of the
world, however I cannot find a solution.  I have 2 routers connecting
to the "world".  Each router has quite a large routing table.  They are
using BGP/IGRP.  We have been using DEFAULT ROUTES in our SUN's and
PCs, however, as you can quess, when one router/link fails, half my
population is dead in the water.        

It appears that my ONLY option is RIP, as it is supported with ROUTED
on the desktop.  However, running RIP on my router causes quite a bit
of processing and delay due to the large tables (or so I am assuming).
I have heard about GATED, which is on our AIX systems, it can listen
for OSPF/RIP/IGP (or so I am told).  What options are possible on the
SUN?  How is the industry handling this situation?  Thanks