USG2120BSR通过Serial口与对端设备对接不成功

发布时间:  2012-07-18 浏览次数:  97 下载次数:  0
问题描述
用户的USG2120BSR与第三方路由器通过Serial 口对接,链路层可以UP,但是协议层一直DOWN的。
告警信息
处理过程

1、查看端口信息

Serial2/0/0 current state : UP  
Line protocol current state : UP
Description : Huawei Symantec, Secospace Series, Serial2/0/0 Interface
The Maximum Transmit Unit is 1500 bytes, Hold timer is 10(sec)
Internet Address is unnumbered, using address of Vlanif11(198.181.110.50/24)
Link layer protocol is PPP
LCP opened, IPCP acksent
Output queue : (Urgent queue : Size/Length/Discards)  0/50/0
Output queue : (Protocol queue : Size/Length/Discards) 0/1000/0
Output queue : (FIFO queuing : Size/Length/Discards)  0/256/0
Physical layer is synchronous,
Interface is DTE, Clock is DTECLK1, Cable type is V35
    Last 300 seconds input rate 0.00 bytes/sec, 0.00 packets/sec
    Last 300 seconds output rate 0.00 bytes/sec, 0.00 packets/sec
    Input: 679 packets, 9814 bytes
           115 errors:
           109 non octet_aligned, 2 abort sequence
           0 giants, 4 CRC, 0 overruns, 0 carrier lost
    Output:666 packets, 10996 bytes
           0 errors:
           0 underruns, 0 CTS lost errors
    DCD=UP  DTR=UP  DSR=UP  RTS=UP  CTS=UP 

红色字体表示IPCP状态不正常,导致PPP协商不成功

2、查看PPP的debugging信息,发现对端路由器不能识别我司设备发过去的协商报文报文。

2、在Serial下配置2条命令

      undo ppp ipcp nbns request

       undo ppp dns nbns request

问题解决

根因
PPP协商失败
建议与总结

END