请管理和高手帮我分析一下，关于PPPD，GPRS上网的问题！！！

geniusmen

请大家帮帮我呀！！！小弟先谢过了！！\r\n我用的是redhat9.0 用PPPD拨号 通过GPRS上网，运行命令是\r\npppd  /dev/pts/1  115200 connect  \'chat -v \"\"  at+cgdcont=1,\\\"IP\\\",\\\"cmnet\\\" OK  atd*98*1#  CONNECT\'\r\n  在log下的message是\r\nOct 31 11:41:55 localhost kernel: PPP generic driver version 2.4.2\r\nOct 31 11:41:55 localhost pppd[2142]: pppd 2.4.1 started by root, uid 0\r\nOct 31 11:41:56 localhost chat[2143]: send (ath0^M)\r\nOct 31 11:41:56 localhost chat[2143]: expect (OK)\r\nOct 31 11:41:56 localhost chat[2143]: ath0^M^M\r\nOct 31 11:41:56 localhost chat[2143]: OK\r\nOct 31 11:41:56 localhost chat[2143]:  -- got it \r\nOct 31 11:41:56 localhost chat[2143]: send (at+cgdcont=1,\"IP\",\"cmnet\"^M)\r\nOct 31 11:41:57 localhost chat[2143]: expect (OK)\r\nOct 31 11:41:57 localhost chat[2143]: ^M\r\nOct 31 11:41:57 localhost chat[2143]: at+cgdcont=1,\"IP\",\"cmnet\"^M^M\r\nOct 31 11:41:57 localhost chat[2143]: OK\r\nOct 31 11:41:57 localhost chat[2143]:  -- got it \r\nOct 31 11:41:57 localhost chat[2143]: send (atd*98*1#^M)\r\nOct 31 11:41:57 localhost chat[2143]: expect (CONNECT)\r\nOct 31 11:41:57 localhost chat[2143]: ^M\r\nOct 31 11:41:57 localhost chat[2143]: atd*98*1#^M^M\r\nOct 31 11:41:57 localhost chat[2143]: CONNECT\r\nOct 31 11:41:57 localhost chat[2143]:  -- got it \r\nOct 31 11:41:57 localhost pppd[2142]: Serial connection established.\r\nOct 31 11:41:57 localhost pppd[2142]: Using interface ppp0\r\nOct 31 11:41:57 localhost pppd[2142]: Connect: ppp0 <--> /dev/pts/1\r\nOct 31 11:41:57 localhost /etc/hotplug/net.agent: assuming ppp0 is already up\r\nOct 31 11:41:58 localhost modprobe: modprobe: Can\'t locate module ppp-compress-21\r\nOct 31 11:41:58 localhost kernel: PPP Deflate Compression module registered\r\nOct 31 11:41:58 localhost modprobe: modprobe: Can\'t locate module ppp-compress-21\r\nOct 31 11:42:04 localhost pppd[2142]: not replacing existing default route to eth2 [172.17.255.254]\r\nOct 31 11:42:04 localhost pppd[2142]: local  IP address 10.67.67.229\r\nOct 31 11:42:04 localhost pppd[2142]: remote IP address 192.168.0.1\r\nOct 31 11:42:04 localhost pppd[2142]: primary   DNS address 211.136.20.203\r\n\r\n很奇怪remote IP address 192.168.0.1\r\n而且我PING根本就PING不通  好像包都没有发出去，请帮忙，谢谢！！！

a_la_lei

在这个文件/etc/conf.modules 中加入下面两行就可以了：\r\nalias tty-ldisc-3 bsd_comp\r\nalias ppp0 bsd_comp\r\n\r\n主要是缺少bsd_comp模块。

geniusmen

非常感谢楼上的分析，小弟非常感激，但是当我加入楼上说的那2句后，LOG信息如下：\r\nNov  4 09:34:47 localhost  -- root[1972]: ROOT LOGIN ON tty4\r\nNov  4 09:36:19 localhost pppd[3253]: pppd 2.4.1 started by root, uid 0\r\nNov  4 09:36:20 localhost chat[3254]: send (ath0^M)\r\nNov  4 09:36:20 localhost chat[3254]: expect (OK)\r\nNov  4 09:36:20 localhost chat[3254]: ath0^M^M\r\nNov  4 09:36:20 localhost chat[3254]: OK\r\nNov  4 09:36:20 localhost chat[3254]:  -- got it \r\nNov  4 09:36:20 localhost chat[3254]: send (at+cgdcont=1,\"IP\",\"cmnet\"^M)\r\nNov  4 09:36:21 localhost chat[3254]: expect (OK)\r\nNov  4 09:36:21 localhost chat[3254]: ^M\r\nNov  4 09:36:21 localhost chat[3254]: at+cgdcont=1,\"IP\",\"cmnet\"^M^M\r\nNov  4 09:36:21 localhost chat[3254]: OK\r\nNov  4 09:36:21 localhost chat[3254]:  -- got it \r\nNov  4 09:36:21 localhost chat[3254]: send (atd*99***1#^M)\r\nNov  4 09:36:21 localhost chat[3254]: expect (CONNECT)\r\nNov  4 09:36:21 localhost chat[3254]: ^M\r\nNov  4 09:36:21 localhost chat[3254]: atd*99***1#^M^M\r\nNov  4 09:36:21 localhost chat[3254]: CONNECT\r\nNov  4 09:36:21 localhost chat[3254]:  -- got it \r\nNov  4 09:36:21 localhost pppd[3253]: Serial connection established.\r\nNov  4 09:36:21 localhost modprobe: modprobe: Can\'t locate module tty-ldisc-3\r\nNov  4 09:36:21 localhost pppd[3253]: Couldn\'t set tty to PPP discipline: Invalid argument\r\nNov  4 09:36:22 localhost pppd[3253]: Hangup (SIGHUP)\r\nNov  4 09:36:22 localhost pppd[3253]: Exit.\r\n\r\n小弟希望楼上的朋友帮再分析一下也希望进楼的朋友留下自己的看法！谢谢！

geniusmen

对了。楼上加那2句的意思是不是为了解决LOG中提示没有压缩功能的问题呢？\r\n\r\n   我添加了 alias ppp-compress-21 bsd_comp\r\n\r\n     alias ppp-compress-21 ppp_deflate\r\n\r\n     alias ppp-compress-21 ppp_deflate\r\n     \r\n    Nov  3 11:14:38 localhost pppd[14144]: pppd 2.4.1 started by root, uid 0\r\nNov  3 11:14:39 localhost chat[14145]: send (ath0^M)\r\nNov  3 11:14:39 localhost chat[14145]: expect (OK)\r\nNov  3 11:14:39 localhost chat[14145]: ath0^M^M\r\nNov  3 11:14:39 localhost chat[14145]: OK\r\nNov  3 11:14:39 localhost chat[14145]:  -- got it \r\nNov  3 11:14:39 localhost chat[14145]: send (at+cgdcont=1,\"IP\",\"cmnet\"^M)\r\nNov  3 11:14:40 localhost chat[14145]: expect (OK)\r\nNov  3 11:14:40 localhost chat[14145]: ^M\r\nNov  3 11:14:40 localhost chat[14145]: at+cgdcont=1,\"IP\",\"cmnet\"^M^M\r\nNov  3 11:14:40 localhost chat[14145]: OK\r\nNov  3 11:14:40 localhost chat[14145]:  -- got it \r\nNov  3 11:14:40 localhost chat[14145]: send (atd*98*1#^M)\r\nNov  3 11:14:40 localhost chat[14145]: expect (CONNECT)\r\nNov  3 11:14:40 localhost chat[14145]: ^M\r\nNov  3 11:14:40 localhost chat[14145]: atd*98*1#^M^M\r\nNov  3 11:14:40 localhost chat[14145]: CONNECT\r\nNov  3 11:14:40 localhost chat[14145]:  -- got it \r\nNov  3 11:14:40 localhost pppd[14144]: Serial connection established.\r\nNov  3 11:14:40 localhost pppd[14144]: Using interface ppp0\r\nNov  3 11:14:40 localhost pppd[14144]: Connect: ppp0 <--> /dev/pts/1\r\nNov  3 11:14:40 localhost /etc/hotplug/net.agent: assuming ppp0 is already up\r\nNov  3 11:14:48 localhost pppd[14144]: not replacing existing default route to eth2 [172.17.255.254]\r\nNov  3 11:14:48 localhost pppd[14144]: local  IP address 10.67.52.177\r\nNov  3 11:14:48 localhost pppd[14144]: remote IP address 192.168.0.1\r\nNov  3 11:14:48 localhost pppd[14144]: primary   DNS address 211.136.20.203\r\n\r\n     然后提示没有压缩功能的LOG信息消失，但是问题同样存在！\r\n\r\n   我写了抓串口的数据包，和WINDOWS进行了对比，觉得没有那么多（PPPD和模块驱动交互的数据包）\r\n\r\n\r\n   在pppd程序运行的时候，先要通过LCP协议，然后进行NAP,CHAP权限验证，然后是NCP， 觉得在NCP的交互和\r\n\r\n   WINDOWS下有点出入，会不会是LINUX下NCP的交互缺少部分信息交互呢？