Setting up a Cisco 827 for DSL 1

[salmans]

I am setting up a Cisco 827 for DSL and have run into a problem. The router will authenticate and then bind to the port, but then immediately unbinds and this continues binding/unbinding every couple seconds. Below are the configurations. Any suggestions?

Current configuration : 3492 bytes
!
version 12.1
no service single-slot-reload-enable
no service pad
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname NMP
!
logging rate-limit console 10 except errors
enable password ********
!
ip subnet-zero
no ip finger
no ip domain-lookup
!
no ip dhcp-client network-discovery
vpdn enable
no vpdn logging
!
vpdn-group ppoe
request-dialin
protocol pppoe
!
!
interface Ethernet0
description ethernet port
ip address 192.168.60.1 255.255.255.0
ip nat inside
!
interface Virtual-Template1
no ip address
autodetect encapsulation ppp
cdp enable
!
interface ATM0
description ADSL port
no ip address
no atm ilmi-keepalive
pvc 8/35
encapsulation aal5snap
protocol pppoe
pppoe-client dial-pool-number 1
!
bundle-enable
dsl operating-mode auto
!
interface ATM0.1 point-to-point
!
interface Dialer0
ip address **.**.***.** 255.0.0.0
no ip redirects
no ip unreachables
ip nat outside
encapsulation ppp
dialer pool 1
dialer-group 1
autodetect encapsulation ppp
ppp pap sent-username ******@******.net password ****
ppp ipcp dns request
!
ip classless
ip route 0.0.0.0 0.0.0.0 Dialer0
no ip http server
!
ip nat inside source list 1 interface Dialer0 overload
ip nat inside source static tcp 192.168.60.254 25 interface Dialer0 25
!
line con 0
password ********
transport input none
stopbits 1
line vty 0 4
password *********
login
!
scheduler max-task-time 5000
end

Or if someone has a copy of a generic DSL setup I could try comparing that. Any help would be greatly appreciated.Thanks.

BOB

 

[jimmyzz]

BOB,
There are many different ways on setting up ADSL. From your config your using PPPoE (point-to-point over Ethernet). I assume you got this sample config from your ISP. If not, perhaps you can contact them as they will send you a sample config of the ADSL configs they support.

You can try the following with your config for PPPoE. Under the Virtual-Template interface, set the mtu to 1492. This is the max for PPPoE.
Router(config-if)#ip mtu 1492

You should also run some debugs to troubleshoot the error:
> debug atm events
> debug atm errors
> show interfaces
(shows you the status of your ATM and Virtual-Template interfaces)

JimmyZ

 

[rhino99]

Just going through the initial steps at setting up an 827 myself tonight. Had the same issue, but my config was set for CHAP... switched it to PAP and the link stayed up.

Now on to NAT and DHCP

 

[JOAMON]

One item you need to fix.

I see the following statement:

ip nat inside source list 1 interface Dialer0 overload

The access list is missing....and you should use 102 instead of 1 as 1 is usually used for a standard list and you will want an extended list for this.

Access-list 102 permit ip 192.168.60.0 0.0.0.255 any
with
ip nat inside source list 102 interface dialer0 overload