net boot linux hang

[Gavinux Li <linux4sparc@yahoo.com>]

I got problem when the IPX start booting linux from
network.
Here is the details:

I use null modem cable connect my PC to IPX to try net
boot and install debian
my IPX has no keyboard, no monitor.
my PC is running Redhat 7.1, I installed DHCP server,
rarpd, tftpd, nfsd in it. I didn't install DNS server.

I edited /etc/ethers add:
08:00:20:aa:bb:cc sparc

I edit /etc/hosts add:
192.168.1.10 sparc

/etc/xinetd.conf contains:
service tftp
{
     disable = no
     socket_type = dgram
     protocol    = udp
     wait        = yes
     user        = root
     server      = /usr/sbin/in.tftpd
     server_args = -s /tftpboot
}

I edited /etc/sysctl.conf add:
net.ipv4.ip_no_pmtu_disc = 1  I don't know what this
is used for???

I got tftpboot.img for sun4cdm and put it in /tftpboot
I made a symlic link by:
ln -s tftpboot.img C0A8010A.SUN4C

I got root.tar.gz and untared it to /tftpboot/, it
creat a directory debian-sparc-root, I changed it to
sparcroot/
Do I need this root file??

I edit /etc/fstab, goto the end and add:
/tftpboot/sparcroot /  nfs default 0 0

I add a statement to /etc/exports
/tftpboot/sparcroot     sparc(rw, no_root_squash)

I created a symblic link by
cd /tftpboot
ln -s sparcroot 192.168.1.10

I reboot my PC, everything is [OK]
I started minicom, power on IPX
When my PC display the IPX is checking memory, I send
Ctrl-A F , then IPX goes into boot prompt status,
the I issued command

ok boot net serial

It displays:

Boot device : /sbus/le@0,c00000   File and args :
serial
1e4e00
TILO
Booting Linux...

It suspended here!  :-(

Is there any expert can tell me what is wrong?

Thanks for any response!

Good night!

Gavin

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