现象:故障小区反映用户上网出现拨号认证通过以后在15秒左右就发生断线情况
现场判断:1)对汇聚HW-CX300全光设备,做端口转换级联hw2008交换设备,查看存在通过pppoe拨号15秒左右就发生断线情况;
2)核对HW-CX300软件配置无误,并考虑pppoe拨号通过认证,则证明上行链路及下行配置没有问题
3)运行snmp协议查看HW-CX300个端口流量,无异常
4)运行sniffer进行抓包分析发现
4 00:15:C5:78:##.## Ethernet Broadcast 64 3.036116 PPPoE Discovery
5 Huawei Tech:02:##.## 00:15:C5:78:##.## 64 3.040721 PPPoE Discovery
6 00:15:C5:78:##.## Huawei Tech:02:##.## 64 3.040763 PPPoE Discovery
7 Huawei Tech:02:##.## 00:15:C5:78:##.## 64 3.051805 PPPoE Discovery
8 00:15:C5:78:##.## Huawei Tech:02:##.## 64 3.064708 Link Control Configure Request
9 Huawei Tech:02:##.## 00:15:C5:78:##.## 64 3.072070 Link Control Configure Request
10 00:15:C5:78:##.## Huawei Tech:02:##.## 64 3.073335 Link Control Configure ACK
11 Huawei Tech:02:##.## 00:15:C5:78:##.## 64 4.075646 Link Control Configure Request
12 00:15:C5:78:##.## Huawei Tech:02:##.## 64 4.077390 Link Control Configure ACK
13 00:15:C5:78:##.## Huawei Tech:02:##.## 64 5.061693 Link Control Configure Request
14 Huawei Tech:02:##.## 00:15:C5:78:##.## 64 5.071090 Link Control Configure Reject
15 00:15:C5:78:##.## Huawei Tech:02:##.## 64 5.072532 Link Control Configure Request
16 Huawei Tech:02:##.## 00:15:C5:78:##.## 64 5.081123 Link Control Configure NAK
17 00:15:C5:78:##.## Huawei Tech:02:##.## 64 5.083283 Link Control Configure Request
18 Huawei Tech:02:##.## 00:15:C5:78:##.## 64 5.090916 Link Control Configure NAK
19 00:15:C5:78:##.## Huawei Tech:02:##.## 64 5.093035 Link Control Configure Request
20 Huawei Tech:02:##.## 00:15:C5:78:##.## 64 5.101005 Link Control Configure ACK
21 00:15:C5:78:##.## Huawei Tech:02:##.## 64 5.103080 Link Control Identification
22 00:15:C5:78:##.## Huawei Tech:02:##.## 64 5.103248 Link Control Identification
23 00:15:C5:78:##.## Huawei Tech:02:##.## 64 5.103448 Password Authentication
24 Huawei Tech:02:##.## 00:15:C5:78:##.## 68 5.171836 Password Authentication
25 Huawei Tech:02:##.## 00:15:C5:78:##.## 64 5.171884 IP Control Protocol Configure Request
26 00:15:C5:78:##.## Huawei Tech:02:##.## 64 5.174816 PPPoE Session
27 00:15:C5:78:##.## Huawei Tech:02:##.## 64 5.175105 IP Control Protocol Configure Request
28 00:15:C5:78:##.## Huawei Tech:02:##.## 64 5.175393 IP Control Protocol Configure ACK
29 Huawei Tech:02:##.## 00:15:C5:78:##.## 64 5.181560 Link Control Protocol Reject
30 Huawei Tech:02:##.## 00:15:C5:78:##.## 64 5.181603 IP Control Protocol Configure Reject
31 00:15:C5:78:##.## Huawei Tech:02:##.## 64 5.184098 IP Control Protocol Configure Request
32 Huawei Tech:02:##.## 00:15:C5:78:##.## 64 5.191486 IP Control Protocol Configure NAK
33 00:15:C5:78:##.## Huawei Tech:02:##.## 64 5.193671 IP Control Protocol Configure Request
34 Huawei Tech:02:##.## 00:15:C5:78:##.## 64 5.201112 IP Control Protocol Configure ACK
(以上是pppoe认证)
……………………………………………………………………………….
………………………………………………………………………………..
205 Huawei Tech:02:##:## 00:15:C5:##:##:## 64 14.250093 PPPoE Discovery
206 00:15:C5:##:##:## Huawei Tech:02:##:## 64 14.250129 PPPoE Discovery
收到205 Huawei Tech:02:##:##设备发出PPPoE Discovery后造成通讯中断,及故障点的位置应该在通局上端发起造成PPPoE连接中断.
5)考虑可能存在radius认证计费系统出现问题,但是如果radius认证计费系统出现问故障,影响的区域范围将更大
6)核查局端hw5200的配置发现对应的备用radius 服务认证端口配置错误
7)询问radius中心核查对应主用 radius认证计费系统出现故障,现已经切换到备用系统,因为以前主radius认证计费系统无故障,没有发现此设备备用radius 服务认证端口配置错误,造成单个设备出现问题;
故障原因为pppoe通过认证,但开始计费是发现对应帐号不在计费系统,于是发出剔除命令造成用户断线,更改hw5200配置后问题解除. |