I'm really confused about what's happening.
On any RH 6.x I'm not able to mount with any NFS version any qtree exported in my volume. Same exported qtrees work fine with either RH 5.x and RH 7.x, no matter if I choose version 3 or 4.
Error is always access denied.
Same 6.x servers works fine in 7-Mode environment
Path to the qtree is correcty enabled at read level for all the servers.
check the export policy on the svm root vol, and the qtree parent vol.