changing default nfs mount options

[Evuraan <evuraan@gmail.com>]

hello,

i did  install nfs-common portmap, and nfs client works:

below are the options i see take effect per /proc/mounts if i say
"mount -t nfs blah:/fs /tmp/somedir"

rw,vers=3,rsize=32768,wsize=32768,namlen=255,hard,nointr,proto=tcp,timeo=600,retrans=2,sec=sys,mountproto=udp

how can i change some of the above without having to use the "-o"
option to the mount command?

for instance, timeo=10 instead of 600, or proto=udp instead of proto=udp ?

i tried looking in /etc/default/nfs-common but could not figure this
out. any help wud be much appreciated. thx.