NFS mount problem Ultrix to AIX

[John P. Eisenmenger]

>From article <1990Oct23.175013.1 at phys.anu.oz>, by 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.

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

The problem is in the type of ethernet packet in use.  Your RS6000 is using
Xerox Ethernet, whereas you Ultrix station is using IEEE 802.3.  If you
change your RS6000 to use IEEE 802.3 things will work.  For some reason
this doesn't show up in other protocols, and most of the mounting process
actually goes okay.  It's when the actual ..MOUNT.. request gets sent
that the 6000 sends a short packet and gets turned down.

I'm sorry that I can't tell you how to change your card's packet
type.  It has something to do with configuring for et0 instead of
en0, although netstat still shows en0 (isn't life great?).

-John P. Eisenmenger
 Dept of Electrical Engineering
 Duke University