Improper connection solves vro dial failure

Improper connection solves the problem that a vro cannot be used for dialing. you can master the following knowledge about vro cannot be used for dialing. It takes only a few minutes to resolve the problem that a vro cannot be used for dialing. IP address connection, local connection will also be mentioned in this article.

I have configured a 16-day AM module. A strange problem occurred. After the configuration is complete, no Modem dialing sound is triggered during the dial. Only the phone call. And the sound indicator is not on. When I unplug the telephone line on the module. The indicator light is on.

◆ The vro cannot be configured for a dial-up fault [B] [/B]

◆ 620 # sh run

◆ Building configuration...

◆ Current configuration: 866 bytes

◆!

◆ Version 12.2

◆ Service timestamps debug uptime

◆ Service timestamps Jog uptime

◆ No service password-encryption

◆ A dial failure occurs on the router!

◆ Hostname2620

◆ Enable secret 5 $1 $ pUrf $ 9xGOg. zyxKawi9NljLHHr1

◆ Usernameuser password 0 Cisco

◆ Ip subnet-zero

◆!

◆ A dial-up failure occurs on the vro )!

◆ No ip domain-lookup

◆!

◆!

◆!

◆!

◆ Interface FastEthernet0/0

◆ Ip address 136.0.0.252.165.255.0.0

◆ Duplex auto

◆ Speed auto

◆!

◆ Interface Group-Async1

◆ Ip unnumbered FastEthernet0/0

◆ Encapsulation ppp

◆ Async default routing

◆ Async mode interactive

◆ Peer default ip address pool lab

◆ Ppp authentication chap

◆ Group-range 33 48

◆!

◆!

◆ Ip classless

◆ No ip http server

◆ Ip pim bidir-enable

◆!

◆!

◆ Line con 0

◆ Password cisco

◆ Line 33 48

◆ Login local

◆ Modem InOut

◆ Autocommand ppp

◆ Transport input all

◆ Autoselect ppp

◆ Stopbits 1

◆ Flowcontrol hardware

◆ Line aux0

◆ Line vty 0 4

◆ Password Cisco

◆ Login

◆!

◆ No scheduler allocate

◆ End

Router failure dialing fault diagnosis process

I carefully checked the configuration file and found that the ip pool is missing, and the ip local pool lab (start ip addr) (stop ip addr) is ineffective. Later, I thought that the dial-up was based on analog signals, which had a lot to do with grounding. No automatic response: Most of the failures caused by Dial failure on the vro are caused by ground connection. Therefore, the grounding screw on the router is directly connected to the Iron Pillar under the anti-static floor with a wire. The problem is solved.

Experiences in troubleshooting vro failures

The router standard grounding method is to place a ground wire when laying the power cord, and then the router shell is connected to the ground wire, the author estimates that the power cord used by the vendor responsible for building the network system ignores the ground wire, otherwise this problem will not occur. If there is a ground wire when the router power supply is connected, we generally do not need to ground again.