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发布时间：2006-06-28 06:26     点击：

明白show line输出的含义

Show line line-number EXEC是非常有用的trobbleshooting命令.

现象:MODEM和路由器间无连接.试用反登录无反应或用户收到"Connection Refused by Foreign Host"信息.

建议:

用show line看MODEM一栏是否是"inout",若不是,在路由器上:

Router#conf t

Router(config)#line aux 0

Router(config-line)#modem inout

Router(config-line)#^Z

Router#

确定正确的线缆.

硬件问题,请与你的代理联系.

现象:MODEM不拨号.

建议:MODEM不拨号,排除掉硬件,线缆的可能,就是:

不感兴趣的包.用show running-config检查路由器配置,是否设置了dialer-list截段了你想传送的包,若是请重新配置access-list表.

Chat script配置错误.打开debug信息.

Router#debug dialer

%LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0, changed state to down

%LINK-3-UPDOWN: Interface Serial0, changed state to down

%LINK-3-UPDOWN: Interface Async1, changed state to down

Async1: re-enable timeout

Async1: sending broadcast to default destination get_free_dialer: faking it

Async1: Dialing cause: Async1: ip PERMIT

Async1:No holdq created - not configured

Async1: Attempting to dial 8292

CHAT1: Attempting async line dialer script

CHAT1: Dialing using Modem script: backup & System script: none -- failed, not connected

CHAT1: process started

CHAT1: Asserting DTR

CHAT1: Chat script backup started

CHAT1: Expecting string:

Async1: sending broadcast to default destination -- failed, not connected

CHAT1: Timeout expecting:

CHAT1: Chat script backup finished, status = Connection timed out; remote host not responding

Async1: disconnecting call

......

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