FreeBSD PXE client not getting netmask config from DHCP server

[vincenzo romero]

Hello Erik,

Thanks for the response.  I have followed your recommendation as follows:

1.  In effect my dhcpd.conf now looks like this:

ddns-update-style interim;
ignore client-updates;

subnet 192.168.16.0  netmask 255.255.240.0 {
        option routers                  192.168.16.1;
        option subnet-mask              255.255.240.0;
        range dynamic-bootp 192.168.16.10 192.168.16.30;
        default-lease-time 21600;
        max-lease-time 43200;

host r02s01 {
  hardware ethernet 00:A0:D1:E3:58:38;
  fixed-address 192.168.17.11;
  filename "pxeboot";
  option root-path "192.168.17.1:/export/images/NFSroot_gold/freebsd7_x64";
  option host-name "r02s01";
  }
}
next-server 192.168.17.1;

2.  Thereafter, I restarted the dhcpd service, and then rebooted my
freebsd client (r02s01) .  Upon logging in, I checked its
configuration, and still the netmask reflects the 255.255.255.0
subnet:

r02s01# ifconfig -a
nfe0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu
1500 options=19b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,TSO4>
        ether 00:a0:d1:e3:58:38
        inet 192.168.17.11 netmask 0xffffff00 broadcast 192.168.17.255
        inet6 fe80::2a0:d1ff:fee3:5838%nfe0 prefixlen 64 scopeid 0x1
        media: Ethernet autoselect (1000baseTX <full-duplex,flag2>)

** netmask 0xffffff00 - which means this, right:
Name                  Example
CIDR                         /24
Netmask            255.255.255.0
Netmask (hex)         0xffffff00
Wilcard Bits           0.0.0.255

*sigh* ... am I missing something in my client side?

thanks in advance!

On Wed, Mar 26, 2008 at 4:24 AM, Erik Norgaard <norgaard at locolomo.org> wrote:
>
> vincenzo romero wrote:
>  > Hello all,
>  >
>  > I wanted to check and test my PXE clients - where I have:
>  >
>  > - Cent OS 5.1 - PXE/DHCP/TFTP/NFS server with the root-NFS-images
>  > - client - FreeBSD 7:
>  > uname -a
>  > FreeBSD r02s01 7.0-RELEASE FreeBSD 7.0-RELEASE #1: Mon Mar  3 21:52:54
>  > PST 2008     root at Freebsdtest.maxiscale.com:/usr/src/sys/amd64/compile/CUSTOMKRNL
>  >  amd64
>  >
>  > ...
>  >
>  > 1.  My /etc/dhcpd.conf server has defined a gateway/router and subnet mask
>  >
>  > cat /etc/dhcpd.conf
>  > ddns-update-style interim;
>  > ignore client-updates;
>  >
>  > subnet 192.168.16.0  netmask 255.255.240.0 {
>  > # --- default gateway
>  >         option routers                  192.168.16.1;
>  >         option subnet-mask              255.255.240.0;
>  >
>  >         range dynamic-bootp 192.168.16.10 192.168.16.30;
>  >         default-lease-time 21600;
>  >         max-lease-time 43200;
>  > }
>  >
>  >
>  > 2.  freebsd test server parameters defined as such:
>  >
>  > host r02s01 {
>  >   hardware ethernet 00:A0:D1:E3:58:38;
>  >   fixed-address 192.168.17.11;
>  >   filename "pxeboot";
>  >   option root-path "192.168.17.1:/export/images/NFSroot_gold/freebsd7_x64";
>  >   option host-name "r02s01";
>  > }
>  >
>  > 3.  PROBLEM - when the client boots and I login ..... i notice that
>  > the netmask it is configured with is 255.255.255.0 ...
>  >
>  > Am I missing something in my configuration?  I am not having these
>  > issues (i think) with my diskless Fedora, Ubuntu clients ...
>  >
>  > Any help will be greatly appreciated
>  >
>  If your host declaration is outside the subnet declation the subnet
>  parameters are not sent, the client should then default to the netmask
>  /24 since 192.168 is in the old class C network range. Place the host
>  declaration inside the subnet declaration.
>
>  BR, Erik
>
>
>  --
>  Erik Nørgaard
>  Ph: +34.666334818                           http://www.locolomo.org
>



-- 
best,

Vince