ADSL突然就不能上网了

发布时间:  2012-07-18 浏览次数:  121 下载次数:  0
问题描述
客户反馈早上用的好好的,突然就不能上网了,拔下网线使用电脑拨号能够正常上网,但是插上设备获取不到公网IP
告警信息
处理过程

查看客户上网配置,没有发现问题

firewall packet-filter default permit interzone local trust direction inbound
firewall packet-filter default permit interzone local trust direction outbound
firewall packet-filter default permit interzone local untrust direction inbound
firewall packet-filter default permit interzone local untrust direction outbound
firewall packet-filter default permit interzone local dmz direction inbound
firewall packet-filter default permit interzone local dmz direction outbound
firewall packet-filter default permit interzone trust untrust direction inbound
firewall packet-filter default permit interzone trust untrust direction outbound
firewall packet-filter default permit interzone trust dmz direction inbound
firewall packet-filter default permit interzone trust dmz direction outbound
firewall packet-filter default permit interzone dmz untrust direction inbound
firewall packet-filter default permit interzone dmz untrust direction outbound

interface GigabitEthernet0/0/0
pppoe-client dial-bundle-number 1

interface Dialer1
link-protocol ppp
ppp pap local-user xxxx password simple 00000
mtu 1450
ip address ppp-negotiate
dialer user peer1
dialer-group 1
dialer bundle 1

firewall zone untrust
set priority 5
add interface GigabitEthernet0/0/0
add interface Dialer1

ip route-static 0.0.0.0 0.0.0.0 Dialer1

debugging ppp all 后获得一下信息

%%01PHY/4/STATUSUP(l): GigabitEthernet0/0/1 changed status to up.
%%01IFNET/4/LINK_STATE(l): Line protocol on interface GigabitEthernet0/0/1 has turned into UP state.
%%01PHY/4/STATUSUP(l): GigabitEthernet0/0/0 changed status to up.
PPP/7/debug2:
PPP Event:
Dialer1:0 LCP Open Event
state initial
PPP/7/debug2:
PPP State Change:
Dialer1:0 LCP : initial --> starting
PPP/7/debug2:
PPP Event:
Dialer1:0 LCP Lower Up Event
state starting
PPP/7/debug2:
PPP State Change:
Dialer1:0 LCP : starting --> reqsent
PPP/7/debug2:
PPP Packet:
Dialer1:0 Output LCP(c021) Pkt, Len 18
State reqsent, code ConfReq(01), id 1, len 14
MRU(1), len 4, val 05aa
MagicNumber(5), len 6, val 00a39ed4
PPP/7/debug2:
PPP Event:
Dialer1:0 : send packet to QosTransmit!
PPP/7/debug2:
PPP Packet:
Dialer1:0 Input LCP(c021) Pkt, Len 18
State reqsent, code ConfAck(02), id 1, len 14
MRU(1), len 4, val 05aa
MagicNumber(5), len 6, val 00a39ed4
PPP/7/debug2:
PPP Event:
Dialer1:0 LCP RCA(Receive Config Ack) Event
state reqsent
PPP/7/debug2:
PPP State Change:
Dialer1:0 LCP : reqsent --> ackrcvd
PPP/7/debug2:
PPP Event:
Dialer1:0 LCP TO (Timeout with counter > 0) Event
state ackrcvd , Retransmit = 4
PPP/7/debug2:
PPP State Change:
Dialer1:0 LCP : ackrcvd --> reqsent
PPP/7/debug2:
PPP Packet:
Dialer1:0 Output LCP(c021) Pkt, Len 18
State reqsent, code ConfReq(01), id 2, len 14
MRU(1), len 4, val 05aa
MagicNumber(5), len 6, val 00a39673
PPP/7/debug2:
PPP Event:
Dialer1:0 : send packet to QosTransmit!
PPP/7/debug2:
PPP Packet:
Dialer1:0 Input LCP(c021) Pkt, Len 23
State reqsent, code ConfReq(01), id 1, len 19
MRU(1), len 4, val 05d4
AuthProto(3), len 5, CHAP c22305
MagicNumber(5), len 6, val 030047b3
PPP/7/debug2:
PPP Event:
Dialer1:0 LCP RCR-(Receive Config Bad Request) Event
state reqsent


发现PPP只能在lcp 初始化阶段,判断为PPP协商参数配置错误,添加chap认证方式后问题解决

根因

1.运营商问题

2.设备接口故障

建议与总结
通过查看客户电脑客户端拨号设置也能获取此信息

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