Hello Every One,
I am using IXP425 development board ported with Redboot 2.02 and Montavista 2.4.20 mvl31-ixdp4xx as kernel.
I am trying to load file system to board via NFS but kernel is not detecting the ethernet i thing. Ihave open the portmap and nfsd as suggested. Follwing is the bootscript. If anybody has crack for this problem please specify.

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Testing Ram From 0x00026c68 to 0x08000000 ...+
Testing Ram From 0x00026c68 to 0x08000000 ..........
Testing Ram Sucessly!!

RedBoot(tm) bootstrap and debug environment [ROM]
Red Hat certified release, version 2.02 - built 11:53:41, Jul 7 2006

Platform: IXDP425 Development Platform (IXP42X 533MHz) BE
Copyright (C) 2000, 2001, 2002, 2003, 2004 Red Hat, Inc.

Comtrend CORP. For Prod uct Type : CT-726

RAM: 0x00000000-0x08000000, [0x00026c68-0x07fbc000] available
FLASH: 0x50000000 - 0x52000000, 256 blocks of 0x00020000 bytes each.
Boot Fail, Eth should be start

Trying NPE-B...success. Using NPE-B with PHY 0.-
... waiting fonformation
Etthernet eth0: M0:30:da:ac:5a:1f
IP: 192.1608.172.10/255.25ateway: 192.168.172.50t
Default server2.i168.172.50
Red
RedBoot> fis load vmlinuz
RedBoot> exec 0x1008000
... Unlock from 0x50080000-0x51fe0000: .................................................................................................... .................................................................................................... ...................................................
Using base address 0x01008000 and length 0x000d0000
Uncompressing Linux...................................................... done, booting the kernel.
Linux version 2.4.20_mvl31-ixdp4xx (root@localhost.localdomain) (gcc version 3.3.1 (MontaVista 3.3.1-3.0.10.0300532 2003-12-24)) #1 Wed Oct 10 12:09:29 IST 2007
CPU: XScale-IXP4xx/IXC11xx [690541c1] revision 1 (ARMv5TE)
CPU: D undefined 5 cache
CPU: I cache: 32768 bytes, associativity 32, 32 byte lines, 32 sets
CPU: D cache: 32768 bytes, associativity 32, 32 byte lines, 32 sets
Machine: Intel IXDP425 Development Platform
On node 0 totalpages: 65536
zone(0): 16384 pages.
zone(1): 49152 pages.
zone(2): 0 pages.
Kernel command line: console=ttyS0,115200 root=/dev/nfs ip=dhcp nfsroot=192.168.172.50:/opt/montavistafull/montavista/pro/devkit/arm/xscale_be/target mem=256M@0x00000000
Calibrating delay loop... 527.56 BogoMIPS
Memory: 256MB = 256MB total
Memory: 257492KB available (1270K code, 284K data, 232K init)
XScale Cache/TLB Locking Copyright(c) 2001 MontaVista Software, Inc.
XScale cache_lock_init called
Calling consistent alloc
low_level_page initialized
low_level_page @ 0xd0800000
icache_lock_fn @ 0xd0800080
dcache_lock_fn @ 0xd08000a0
icache_unlock_fn @ 0xd0800098
dcache_unlock_fn @ 0xd08000f0
Initializing TLB locking
TLB locking initialized
Dentry cache hash table entries: 32768 (order: 6, 262144 bytes)
Inode cache hash table entries: 16384 (order: 5, 131072 bytes)
Mount-cache hash table entries: 4096 (order: 3, 32768 bytes)
Buffer-cache hash table entries: 16384 (order: 4, 65536 bytes)
Page-cache hash table entries: 65536 (order: 6, 262144 bytes)
POSIX conformance testing by UNIFIX
PCI Autoconfig: Found Bus 0, Device 2, Function 0
PCI Autoconfig: BAR 0, Mem, size=0x1000000, address=0x4b000000
PCI Autoconfig: Found Bus 0, Device 3, Function 0
PCI Autoconfig: BAR 0, Mem, size=0x1000, address=0x4afff000
PCI Autoconfig: Found Bus 0, Device 3, Function 1
PCI Autoconfig: BAR 0, Mem, size=0x1000, address=0x4affe000
PCI Autoconfig: Found Bus 0, Device 3, Function 2
PCI Autoconfig: BAR 0, Mem, size=0x100, address=0x4affdf00
PCI: bus0: Fast back to back transfers disabled
Linux NET4.0 for Linux 2.4
Based upon Swansea University Computer Society NET3.039
Initializing RT netlink socket
LSP Revision 1
ikconfig 0.5 with /proc/ikconfig
Starting kswapd
Disabling the Out Of Memory Killer
devfs: v1.12c (20020818) Richard Gooch (rgooch@atnf.csiro.au)
devfs: boot_options: 0x1
JFFS2 version 2.1. (C) 2001, 2002 Red Hat, Inc., designed by Axis Communications AB.
i2c-core.o: i2c core module version 2.6.2 (20011118)
i2c-dev.o: i2c /dev entries driver module version 2.6.2 (20011118)
i2c-algo-bit.o: i2c bit algorithm module version 2.6.2 (20011118)
i2c-proc.o version 2.6.2 (20011118)
pty: 256 Unix98 ptys configured
Serial driver version 5.05c (2001-07-08) with MANY_PORTS SHARE_IRQ SERIAL_PCI enabled
ttyS00 at 0xff000003 (irq = 15) is a XSCALE UART
ttyS01 at 0xff001003 (irq = 13) is a XSCALE UART
RAMDISK driver initialized: 16 RAM disks of 8192K size 1024 blocksize
loop: loaded (max 8 devices)
NET4: Linux TCP/IP 1.0 for NET4.0
IP Protocols: ICMP, UDP, TCP
IP: routing cache hash table of 2048 buckets, 16Kbytes
TCP: Hash tables configured (established 16384 bind 32768)
IP-Config: No network devices available.
NET4: Unix domain sockets 1.0/SMP for Linux NET4.0.
NetWinder Floating Point Emulator V0.95 (c) 1998-1999 Rebel.com
Looking up port of RPC 100003/2 on 192.168.172.50
RPC: sendmsg returned error 101
portmap: RPC call returned error 101
Root-NFS: Unable to get nfsd port number from server, using default
Looking up port of RPC 100005/1 on 192.168.172.50
RPC: sendmsg returned error 101
portmap: RPC call returned error 101
Root-NFS: Unable to get mountd port number from server, using default
RPC: sendmsg returned error 101
mount: RPC call returned error 101
Root-NFS: Server returned error -101 while mounting /opt/montavistafull/montavista/pro/devkit/arm/xscale_be/target
VFS: Unable to mount root fs via NFS, trying floppy.
VFS: Cannot open root device "nfs" or 02:00
Please append a correct "root=" boot option
Kernel panic: VFS: Unable to mount root fs on 02:00

Thanks in Advance

did you compile the network driver into the kernel.
if yes then things should work
if not then you must either
a) compile the network module in-kernel
OR
a) try to use initramfs (cpio-gz)
use modules in it and write scripts
which configure the ip and mount the root
and does a pivot_root

Hello Bhasker,
Thank you for u r kind reply. I am beginner to linux. There is no proper documentation on which driver we have to use for IXP425 ethernet. I will try for it.

Thank u once again.