Very Computer

A friend of mine is trying to set up Linux at work
where they use DHCP.  (He's just doing a dhcp client,
not server).  Every time 'dhcpcd' runs, it does absolutely
nothing and then leaves this message in the admin log:

    dhcpcd: No DHCPOFFER Messages

What does this mean and what is wrong?

Further information:
   3com 590 ethernet card.
   tried both "dhcpcd" and "dhcpcd -r", as per Vladimir's web page.
   Running RedHat 4.2 (Linux Kernel 2.0.30)
   3com ethernet driver is loaded as a module, not compiled directly in.
--

1. The network interface should be able to use IP broadcasting
   (that is a kernel option of IP networking) and the interface
   to your network must be set to use broadcasting.

   Here is the line to define such interface (here it is binded
   to the eth0 device).

   /sbin/ifconfig eth0 [host address] broadcast

2. A special route must be added to the routing table:

   /sbin/route add -host 255.255.255.255 dev eth0

For more info about DHCP, check the following URL:

   http://www.fugue.com/dhcp/dhcp-beta-4.html

As ISC explains it

 "The server builds successfully and works mostly correctly
  when only one network interface is configured. Clients which
  are picky about the all-ones broadcast address may not work.
  See the README file for a workaround."

Regards,

Laurent Szyster
///_

: >
: > A friend of mine is trying to set up Linux at work
: > where they use DHCP.  (He's just doing a dhcp client,
: > not server).  Every time 'dhcpcd' runs, it does absolutely
: > nothing and then leaves this message in the admin log:
: >
: >     dhcpcd: No DHCPOFFER Messages
: >
: > What does this mean and what is wrong?

: To get the DHCP server to work on a Linux host you have
: to set up you network interface in a somehow special way

But this is the DHCP client, 'dhcpcd', not the server daemon.
The server in this system is on a Windows NT (grumble grumble) box.

The very same computer runs fine when booted under Win95, and Win95's
TCP/IP options have the IP address set to "Get address from Host".

: 1. The network interface should be able to use IP broadcasting
:    (that is a kernel option of IP networking) and the interface
:    to your network must be set to use broadcasting.

Is this still true for the client, or is this just the server?

:    Here is the line to define such interface (here it is binded
:    to the eth0 device).

:    /sbin/ifconfig eth0 [host address] broadcast

: 2. A special route must be added to the routing table:

:    /sbin/route add -host 255.255.255.255 dev eth0

: For more info about DHCP, check the following URL:

:    http://www.fugue.com/dhcp/dhcp-beta-4.html

: As ISC explains it

:  "The server builds successfully and works mostly correctly
:   when only one network interface is configured. Clients which
:   are picky about the all-ones broadcast address may not work.
:   See the README file for a workaround."

: Regards,

: Laurent Szyster
: ///_
--

Vladimir
P.S. If you could mail me the answer so I can include that in my HOWTO.

Quote:>A friend of mine is trying to set up Linux at work
>where they use DHCP.  (He's just doing a dhcp client,
>not server).  Every time 'dhcpcd' runs, it does absolutely
>nothing and then leaves this message in the admin log:

>    dhcpcd: No DHCPOFFER Messages

>What does this mean and what is wrong?

I am in the same boat (trying to use linux in my office where DHCP
server is Win NT).  I just use the new version of netcfg.  It has an
option for configuring the device with DCHPC.  There are some other
hangs, but it works.

First, it always says that configuring with DHCP failes but in fact it
does not appear to have.  Second, I am having a hard time getting it
to register my hostname in the WINS/DNS server.  Third, on my notebook
the 3c589 PCMCIA ethernet card does not actually configure at boot
even though I hve selected for it to in netcfg.  It used to before I
recompiled my kernel.  Now after I boot, I just cd to where the
configuration files are and run 'ifup ifcfg-eth0'.

wins server = NT.server.IP.number

This should register your Linux server with the WINS server.

Vladimir