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New Member

827 Router Config problem

I am doing a migration of all our ADSL routers (non-cisco) to 827 Cisco router. Until now I had no problem at all.

But with one I have a routing problem :

This is my config :

Cisco827#sh run

Building configuration...

Current configuration : 1199 bytes


version 12.2

no service pad

service timestamps debug uptime

service timestamps log uptime

service password-encryption


hostname Cisco827


no logging buffered

enable secret 5 $1$WQwL$79u5MHQfXmZA9C1Ng3gc30

enable password 7 0101090B4F


username xxxxxx password 7 0316540412

ip subnet-zero

ip name-server

ip name-server


vc-class atm office

inarp 30

inarp 30

encapsulation aal5snap


interface Ethernet0

ip address

ip nat inside

load-interval 30

no keepalive

no cdp enable

hold-queue 100 out


interface ATM0

no ip address

load-interval 30

no atm ilmi-keepalive

dsl operating-mode auto

hold-queue 224 in


interface ATM0.1 point-to-point

description Cisco 827 ADSL PRO

ip address

ip nat outside

pvc 8/35

class-vc office



ip nat inside source list 130 interface ATM0.1 overload

ip classless

ip route

ip http server



access-list 130 permit ip any any

no cdp run


line con 0

exec-timeout 120 0

logging synchronous

stopbits 1

line vty 0 4

exec-timeout 120 0

password 7 095E41060D

login local

length 0


scheduler max-task-time 5000


As you can see , quite an easy config which I did on every router. But on this setup I can ping from my laptop (connected to the router) to and to the WAN IP adress. But I can't ping to the WAN Gateway And on the router I can't ping to my WAN interface and to my WAN Gateway.

Alle the WAN IP addresses and VPI/VCI are OK because I copied them from the non-cisco router.

Probably I am missing something but I can't think of what.

Thanks in advance for the help.

  • Other Network Infrastructure Subjects
New Member

Re: 827 Router Config problem

Something I forgot : I have a good connection to the DSLAM (CD led is green)

But if I do a debug atm packet :

I get ATM0(I): VCD:0x0 type:0x0Inactive or not configured VCD length:0x38

I hope this could help you

Cisco Employee

Re: 827 Router Config problem

first, the "encapsulation ..." command is missing in the config. Also you need to know what kind of technology that adsl line is configured for.

Is it RFC1483 bridging or routing, RBE, PPPoE or PPPoA etc.

Once you have that information, here is the same sample config for that




For RFC1483 bridging

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