Hello Terrence !!
Just in case, whether nfsstat -l doesn't work, that because you're not pointing to the vfiler!!
Enable the NFS statics
options nfs.per_client_stats.enable on
NOTE:
Usually this options Should not remain ON , because causes an performance reduction, Please change it to OFF when you finish.
options nfs.per_client_stats.enable off
In order to reset counters:
houston>vfiler run vfiler0 nfsstat -Z
check the counters
houston>vfiler run vfiler0 nfsstat -l
===== vfiler0
10.10.39.112 <hostname unknown> NFSOPS = 3717911586 ( 3%)
10.10.39.111 <hostname unknown> NFSOPS = 3023359968 ( 3%)
10.10.75.17 <hostname unknown> NFSOPS = 3011651246 ( 3%)
10.10.39.127 <hostname unknown> NFSOPS = 2038641973 ( 2%)
Regards