Hmmm...error 51:
phaduka$ grep 51 /usr/include/errno.h
#define ENETUNREACH     51              /* Network is unreachable */

  Are all the ip addresses in question (netbooted client, server,
dhcp/bootparams/whatever server) on the same network, and are your netmasks
correct?

                 -Dave McGuire

On Wed, 18 Aug 1999, Douglas Meade wrote:
>I've got a Vaxstation 3500 that I'm this close to net-booting,
>but it fails when it tries to mount root with"
>
>revarp failed - err=51
>cannot mount root, error=51
>
>Right before this, I get the typical NFS timeout message 4 times
>in a row, then the message "trying RARP / BOOTPARAM" before the 
>above message occurs.  I've tried the client machine now on two
>different servers, both running NetBSD.  I've also tried going
>back to the 1.4 distribution (I've been using mostly 1.4.1pre).
>Still, same error message.  Curiously, the same servers are 
>booting uVaxII, and various flavors of Vaxstation 3100s with 
>no problem.
>
>After greping through the archives of this group, I found several
>references to this message, but no sure way of getting around it.
>I found one hint in a post by Michael Kukat, which mentioned a 
>kernel that reverses the order of DHCP and revarp, but when I 
>went to the web link, the file was no longer there.  (This is
>http://www.camaronet.de/download/netbsd-bootparams.zip)
>
>I've got the servers set up *exactly* as described in Brian
>Chase's FAQ, that is, with no DHCP set up.  This has worked for
>me for the other machines, and I haven't got around to learning
>the ins and outs of it yet.
>
>Any help is appreciated.  
>
>Doug