NFS mount problem Ultrix to AIX

[david at phys.anu.oz]

I am having problems NFS mounting Ultrix (3.0 and 4.0) file systems on AIX 
3.1. The following message is produced even when the appropriate 
permissions are granted on exported directories.

# mount rsphy1:/users /mnt
mount: server rsphy1 not responding: RPC: Authentication error; why = 
Invalid client credential
nfsmnthelp: rsphy1: The file access permissions do not allow the specified 
action.
mount: giving up on:
        rsphy1:/users
The file access permissions do not allow the specified action.

I successfully mount between DECStations running Ultrix 3.0 and 4.0 and 
also between RS6000/320s including jfs and cd-rom file systems.
I can also mount from AIX to Ultrix successfully, and both ways SUNOS-AIX 
and SUNOS-Ultrix. Also Ultrix-Connection 1.3 on VMS will mount on Ultrix 
and AIX.

Has anyone out there successfully mounted Ultrix to AIX - are there any 
patches required/hacks to passwd & group files/whatever?

Local reps from both IBM and DEC have been unable to help so far.

Please post to "david at phys.anu.edu.au" if you can help.

Thanks in advance,

	David Baldwin
	Head, School Computer Unit
	Research School of Physical Sciences
	Australian National University
	Canberra, Australia

	Phone: intl+61+6+2490104   or (06) 249 0104
	Fax:   intl+61+6+2491884   or (06) 249 1884
	Internet: david at phys.anu.edu.au