Server setup as a Diskless Server on reboot sends DHCP Discover packets out

[Oliver Fromme]

Kim Attree wrote:
 > I've setup a machine as a diskless server, using PXEBoot with ihc-dhcpd
 > to offer dhcp and dhcp configuration information. I did a test reboot on
 > the server, and found to my dismay that the server NIC's are sending out
 > dhcp discover packets and trying to get an address.
 > 
 > The NIC's IP info is captured correctly in /etc/rc.conf:
 > [...]
 > and the /etc/dhclient.conf file is empty. I thought maybe it was the
 > /conf directory used in the diskless Root structure creation, so I
 > renamed it out of the way, but that made no difference.
 > 
 > I can't seem to find where the definition is that makes the NIC's ask
 > for DHCP info.
 >  
 > Shortened output of /var/run/dmesg.boot pertaining to the DHCP Discover
 > packets:
 > 
 > <snip>
 > Sending DHCP Discover packet from interface bge0 (00:0b:db:e6:a9:33)
 > Sending DHCP Discover packet from interface bge1 (00:0b:db:e6:a9:35)

That's the kernel itself trying to perform BOOTP/DHCP.
It does that before mounting the root file system (which
might be mounted via NFS anyway, requiring an IP address
to be obtained via BOOTP or DHCP).

If you don't want that, then remove "options BOOTP" from
your kernel config file and rebuild your kernel.

Best regards
   Oliver

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