uClinux下挂载nfs失败

ZJLog

宿主机Fedora4,设定IP地址192.168.253.1
启动开发板上烧录的uClinux,其IP地址是192.168.253.2
开启宿主机上的nfs服务,其中/etc/exports是这么设置的:
/home/uClinux-dist/user/Myapp 192.168.253.0/255.255.255.0 (rw)
uClinux执行如下
/>;portmap &

/>; mount -t nfs 192.168.253.1:/home/uClinux-dist/user/Myapp /var/temp
mount: RPC: Unable to receive; errno = No route to host
mount: nfsmount failed: Bad file descriptor
mount: Mounting 192.168.253.1:/home/uClinux-dist/user/Myapp on /var/temp failedypid 19: failed 256

但ping宿主机是可以的
/>; ping 192.168.253.1
PING 192.168.253.1 (192.168.253.1): 56 data bytes
64 bytes from 192.168.253.1: icmp_seq=0 ttl=64 time=0.0 ms
64 bytes from 192.168.253.1: icmp_seq=1 ttl=64 time=0.0 ms
64 bytes from 192.168.253.1: icmp_seq=2 ttl=64 time=0.0 ms
64 bytes from 192.168.253.1: icmp_seq=3 ttl=64 time=0.0 ms

--- 192.168.253.1 ping statistics ---
4 packets transmitted, 4 packets received, 0% packet loss
round-trip min/avg/max = 0.0/0.0/0.0 ms
(0.0ms怎么回事?时间太短了??)

从宿主机也可以ping开发板
# ping 192.168.253.2
PING 192.168.253.2 (192.168.253.2) 56(84) bytes of data.
64 bytes from 192.168.253.2: icmp_seq=0 ttl=64 time=0.748 ms
64 bytes from 192.168.253.2: icmp_seq=1 ttl=64 time=0.721 ms
64 bytes from 192.168.253.2: icmp_seq=2 ttl=64 time=0.723 ms
64 bytes from 192.168.253.2: icmp_seq=3 ttl=64 time=0.725 ms

--- 192.168.253.2 ping statistics ---
4 packets transmitted, 4 received, 0% packet loss, time 3000ms
rtt min/avg/max/mdev = 0.721/0.729/0.748/0.022 ms, pipe 2

宿主机iptables设置
-A RH-Firewall-1-INPUT -p udp -m udp --dport 111 -j ACCEPT
-A RH-Firewall-1-INPUT -p udp -m udp --dport 2049 -j ACCEPT

请问各位前辈,问题出在哪里了?谢谢 :em12:

platinum

看一下 /etc/nsswitch.conf

另外请教，uClinux 交叉编译好弄吗？我想玩玩