Hi we are running 8.1 on our 3270 clusters with 17 vfilers on 5 different vlans
The vfilers currently share the same default IPspace and we are (understandably) seeing routing issues (asymmetric routing) 
when NFS clients outside the vFiler's vlan attempt to communicate with the vFiler.  (these clients are the exception  > 95% of 
clients are in the same routable net and don't have any issues)

What are the opinions about adding new IPspaces vs just adding 5 static net routes to the shared routing table so routing works?

thanks,

Fletcher