NFS无法连接成功，求助！

启动输出信息如下，试了很多方法都不行。确定在本地MOUNT成功的。
VIVI version 0.1.4 (root@localhost.localdomain) (gcc version 2.95.3 20010315 (rTMMU table base address = 0x33DFC000
Succeed memory mapping.
NAND device: Manufacture ID: 0xec, Chip ID: 0x76 (Samsung K9D1208V0M)
Found saved vivi parameters.
Press Return to start the LINUX now, any other key for vivi
Copy linux kernel from 0x00030000 to 0x30008000, size = 0x00100000 ... done
zImage magic = 0x016f2818
Setup linux parameters at 0x30000100
linux command line is: "console=ttyS0 root=/dev/nfs nfsroot=192.168.1.17:/real2"
MACH_TYPE = 193
NOW, Booting Linux......
Uncompressing Linux.......................................................... d.
Linux version 2.4.18-rmk7-pxa1 (root@zxy.zxy) (gcc version 2.95.3 20010315 (relT
CPU: ARM/CIRRUS Arm920Tsid(wb) revision 0
Machine: Samsung-SMDK2410
On node 0 totalpages: 16384
zone(0): 16384 pages.
zone(1): 0 pages.
zone(2): 0 pages.
Kernel command line: console=ttyS0 root=/dev/nfs nfsroot=192.168.1.17:/real2410f
DEBUG: timer count 15626
Console: colour dummy device 80x30
Calibrating delay loop... 99.94 BogoMIPS
......
mice: PS/2 mouse device common for all mice
NET4: Linux TCP/IP 1.0 for NET4.0
IP Protocols: ICMP, UDP, TCP
IP: routing cache hash table of 512 buckets, 4Kbytes
TCP: Hash tables configured (established 4096 bind 4096)
IP-Config: Complete:
device=eth0, addr=192.168.1.100, mask=255.255.255.0, gw=192.168.1.17,
host=www, domain=, nis-domain=realembed.com,
bootserver=192.168.1.17, rootserver=192.168.1.17, rootpath=
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 192.168.1.17
hub.c: USB new device connect on bus1/2, assigned device number 2
usb.c: USB device not accepting new address=2 (error=-110)
hub.c: USB new device connect on bus1/2, assigned device number 3
usb.c: USB device not accepting new address=3 (error=-110)
NETDEV WATCHDOG: eth0: transmit timed out
NETDEV WATCHDOG: eth0: transmit timed out
NETDEV WATCHDOG: eth0: transmit timed out
NETDEV WATCHDOG: eth0: transmit timed out
NETDEV WATCHDOG: eth0: transmit timed out
NETDEV WATCHDOG: eth0: transmit timed out
portmap: server 192.168.1.17 not responding, timed out
Root-NFS: Unable to get nfsd port number from server, using default
Looking up port of RPC 100005/1 on 192.168.1.17
NETDEV WATCHDOG: eth0: transmit timed out
NETDEV WATCHDOG: eth0: transmit timed out
NETDEV WATCHDOG: eth0: transmit timed out
NETDEV WATCHDOG: eth0: transmit timed out
NETDEV WATCHDOG: eth0: transmit timed out
NETDEV WATCHDOG: eth0: transmit timed out
portmap: server 192.168.1.17 not responding, timed out
Root-NFS: Unable to get mountd port number from server, using default
NETDEV WATCHDOG: eth0: transmit timed out
NETDEV WATCHDOG: eth0: transmit timed out
NETDEV WATCHDOG: eth0: transmit timed out
NETDEV WATCHDOG: eth0: transmit timed out
NETDEV WATCHDOG: eth0: transmit timed out
NETDEV WATCHDOG: eth0: transmit timed out
mount: server 192.168.1.17 not responding, timed out
Root-NFS: Server returned error -5 while mounting /real2410/root_nfs
VFS: Unable to mount root fs via NFS, trying floppy.
request_module[block-major-2]: Root fs not mounted
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