Re: kern/53329: netboot over nfs broken

[Ryota Ozaki <ozaki-r%netbsd.org@localhost>]

On Wed, May 30, 2018 at 1:05 AM <prlw1%cam.ac.uk@localhost> wrote:
>
> >Number:         53329
> >Category:       kern
> >Synopsis:       netboot over nfs broken
> >Confidential:   no
> >Severity:       serious
> >Priority:       medium
> >Responsible:    kern-bug-people
> >State:          open
> >Class:          sw-bug
> >Submitter-Id:   net
> >Arrival-Date:   Tue May 29 16:05:00 +0000 2018
> >Originator:     Patrick Welche
> >Release:        NetBSD-8.99.19/amd64
> >Organization:
> >Environment:
> >Description:
> Netbooting no longer works. Tried 2 new boxes (one last week with 8.99.17) and one today, so tried my known-to-have-netbooted-successfully-in-the-past laptop, and in all cases (alc0, wm0, wm0), "cannot mount root, error = 79".
>
> The kernel is loaded and started over nfs, not tftp, so I believe that dhcpd and nfsd on a 8.99.19 server are working correctly.
>
> What is new is:
>
> nfs_boot: trying DHCP/BOOTP
> nfs_boot: timeout...
> nfs_boot: timeout...
> nfs_boot: timeout...
>
> The server sees at most 2 requests. One presumably is the successful dhcp request before tftp get pxeboot_ia32.bin.

I suspect the recent switch of the default transport to TCP.
If so adding NFS_BOOT_UDP to your kernel would fix the issue.

  ozaki-r