after ip=autoconf WAS: Kernel (2.4.X series) not doing the initial boot.

AUSTIN MURPHY amurphy at
Fri Oct 12 21:04:46 CEST 2001

I have had some luck passing the following parameters to the kernel:

root=/dev/nfs ip=dhcp

the root= forces the kernel to use wait forever for the network to be
configured and the ip= forces a dhcp request, rather than letting the
kernel decide what to request.

I have had trouble with incorrect information via RARP kernel config but
that may have been due to other problems here.  The DHCP usually takes a
few minutes to actually recognize the response sent from the server.  I
have snooped my boot sequence and there are some unexplainable delays
between when the server sends a DHCP assignment and when the client
accepts it.  

A separate problem that I am having is that when i use only the above two
kernel switches, I get my nfsroot mounted read only!  I have had some
success with adding the nfsroot= switch but I am looking into ways around

Austin Murphy

Student Systems Programmer
Open Systems Support
Rutgers University

On Thu, 11 Oct 2001, Stephane Enten wrote:

>  > >However, the DHCP code still did not accept the DHCPOFFER.
>  > >I explored the net/ipv4/ipconfig.c again and found that there is some
>  > >code to check if ic_myaddr equals INADDR_NONE.
>  > >
>  > >I found that my ic_myaddr was set at at the DHCP request time,
>  > >don't know why.
>  > >
>  > >So I added "ip=" in my kernel config, then the
>  > >ic_myaddr was at INADDR_NONE ( and the kernel was happy,
>  > >did the NFS mount and now I can work on tweaking the installation part :)

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