在开发板上移植3G模块，交叉编译pppd拨号，将pppd和chat传到开发板上，成功连接了网络。
连接网络时分配的IP及DNS：
- C/C++ code
local IP address 172.19.18.45remote IP address 10.64.64.64primary DNS address 210.21.196.6secondary DNS address 221.5.88.88
在/etc/resolv.conf添加DNS服务器地址
- C/C++ code
# cat /etc/resolv.confnameserver 210.21.196.6nameserver 221.5.88.88
ping通百度的IP
- C/C++ code
# ping 220.181.112.143 PING 220.181.112.143 (220.181.112.143): 56 data bytes64 bytes from 220.181.112.143: seq=0 ttl=46 time=1952.636 ms64 bytes from 220.181.112.143: seq=1 ttl=46 time=975.464 ms64 bytes from 220.181.112.143: seq=2 ttl=46 time=256.408 ms64 bytes from 220.181.112.143: seq=3 ttl=46 time=295.257 ms^C--- 220.181.112.143 ping statistics ---4 packets transmitted, 4 packets received, 0% packet lossround-trip min/avg/max = 256.408/869.941/1952.636 ms
不能识别百度的域名
- C/C++ code
# ping www.baidu.com ping: bad address 'www.baidu.com'
- C/C++ code
# nslookup www.baidu.comServer: 210.21.196.6Address 1: 210.21.196.6nslookup: can't resolve 'www.baidu.com'#
能ping通域名服务器。
各位高手请指教指教，谢谢。
------解决方案--------------------------------------------------------
不能根据域名解析出IP，明显应该是dns的问题。