Add vers=3

ghollingworth · web-flow · commit 7ec12e8abfac · 2017-09-04T17:05:44.000+01:00
Stretch now only supports version 3 of nfs and therefore this needs to be specified in the cmdline.txt for the client.
diff --git a/hardware/raspberrypi/bootmodes/net_tutorial.md b/hardware/raspberrypi/bootmodes/net_tutorial.md
@@ -202,7 +202,7 @@ sudo systemctl restart nfs-kernel-server
 Edit /tftpboot/cmdline.txt and from `root=` onwards, and replace it with:
 
 ```
-root=/dev/nfs nfsroot=10.42.0.211:/nfs/client1 rw ip=dhcp rootwait elevator=deadline
+root=/dev/nfs nfsroot=10.42.0.211:/nfs/client1,vers=3 rw ip=dhcp rootwait elevator=deadline
 ```
 
 You should substitute the IP address here with the IP address you have noted down.
