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Configure dynamic DSL on cisco router 877

Kevin Xau
Level 1
Level 1

I have configured a cisco router 877 to run the Dynamic DSL. However, it cannot work, the ATM 0 interface cannot be up . Here is my configuration:

version 12.4

no service pad

service timestamps debug datetime localtime

service timestamps log datetime localtime

no service password-encryption

!

hostname cisco-877

!

boot-start-marker

boot-end-marker

!

!

no aaa new-model

memory-size iomem 20

!

!

dot11 syslog

no ip source-route

ip cef

!

no ip domain lookup

!

!

!

username cisco privilege 15 password 7 094F471A1A0A

!

!

archive

log config

  hidekeys

!

!

!

!

!

interface ATM0

no ip address

no atm ilmi-keepalive

pvc 0/100

  encapsulation aal5mux ppp dialer

  dialer pool-member 1

!

dsl operating-mode auto

!

interface FastEthernet0

!

interface FastEthernet1

!

interface FastEthernet2

!

interface FastEthernet3

!

interface Vlan1

description LAN interface

ip address 172.16.0.1 255.255.255.0

ip nat inside

ip virtual-reassembly

!

interface Dialer1

description DSL interface

ip address negotiated

ip nat outside

ip virtual-reassembly

encapsulation ppp

no ip route-cache cef

no ip route-cache

no ip mroute-cache

dialer pool 1

dialer-group 1

ppp chap hostname xxxxxx@abc.net

ppp chap password 0 7tmvdvk3khjgk52

ppp pap sent-username xxxxxx@abc.net password 0 7tmvdvk3khjgk52

ppp ipcp dns request

ppp ipcp route default

ppp ipcp address accept

ip forward-protocol nd

ip route 0.0.0.0 0.0.0.0 Dialer1

!

no ip http server

no ip http secure-server

ip nat inside source list 100 interface Dialer1 overload

!

access-list 100 permit ip 172.16.0.0 0.0.0.255 any

dialer-list 1 protocol ip permit

!

!

control-plane

!

!

line con 0

login local

no modem enable

line aux 0

line vty 0 4

login local

transport input telnet

!

scheduler max-task-time 5000

scheduler allocate 20000 1000

end

Please help me to figure out which part I'm incorrect.

Thanks

8 Replies 8

lloyd whitton
Level 1
Level 1

what interface connent to your LAN? i Notice you configure 1 vlan with ip address 172.16.0.1 255.255.25.0  it look like you need asign it to the LAN interface.

johnlloyd_13
Level 9
Level 9

hi,

could you run some debugs and do a shutdown/no shutdown on the ATM interface?

kindly post debug output.

debug ppp authentication

debug ppp negotiation

Kevin Xau
Level 1
Level 1

- To lloyd whitton : The port is L2, only can configure IP on Vlan 1.

- To johnlloyd_13 : I have shut / no shut the ATM interface, and do the debug as you give, but no thing display.

hi,

issue the 'terminal monitor' command if you're connected remotely and redo the debug.

could you also check if you're getting a dial tone on this line?

Hi,

- I'm using console cable connect directly to the router, but no thing display.

- The line is working fine because before this line connect to the Dlink router, now we want to change to cisco 877 router.

hi,

contact with your telco/service provider if their DSLAM supports this type of router.

Hi,

I have checked with my ISP SingTel, and they say it can support DSLAM for cisco router 877.

My configuration is missing any command?

hi,

there are some lines i would suggest to be added, but we'll need to make sure your layer 1 is working properly

you sure you've connected the RJ11 to the ADSL/POTS port? please post your 'show interface atm0' output?

if you connect a phone, do you get a dial tone? is there a microfilter in between?