10-24-2007 06:25 AM - edited 03-03-2019 07:19 PM
Hi,
I'm having difficulty getting my BT ADSL to work on my 857w.
The PPP led is on and the inbound and outbound packet counters are incrementing on the atm interface. I can aslo ping the atm interface.
I have tried debugging the PPP negotiation but it does not return any data.
The configuration is as follows;
Building configuration...
Current configuration : 1542 bytes
!
version 12.4
no service pad
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname myhost
!
boot-start-marker
boot-end-marker
!
enable secret xxx
enable password xxxxxxxxxxx
!
no aaa new-model
!
resource policy
!
no ip routing
!
!
no ip cef
no ip domain lookup
!
!
!
!
!
!
!
!
interface ATM0
no ip address
ip nat outside
ip virtual-reassembly
no ip route-cache
no atm ilmi-keepalive
pvc 0/38
encapsulation aal5mux ppp dialer
dialer pool-member 1
!
dsl operating-mode auto
!
interface FastEthernet0
!
interface FastEthernet1
shutdown
!
interface FastEthernet2
shutdown
!
interface FastEthernet3
shutdown
!
interface Dot11Radio0
no ip address
no ip route-cache
shutdown
speed basic-1.0 basic-2.0 basic-5.5 6.0 9.0 basic-11.0 12.0 18.0 24.0 36.0 48.0 54.0
station-role root
!
interface Vlan1
ip address 192.168.1.1 255.255.255.0
ip nat inside
ip virtual-reassembly
no ip route-cache
!
interface Dialer0
ip address negotiated
encapsulation ppp
dialer pool 1
dialer-group 1
ppp chap hostname xxxxxxxxxxxxx
ppp chap password 0 xxxxxxxxxxx
!
!
no ip http server
no ip http secure-server
ip nat pool pool1 192.168.1.0 192.168.2.0 netmask 0.0.0.255
ip nat inside source list 1 interface Dialer0 overload
!
access-list 1 permit 192.168.1.0 0.0.0.255
dialer-list 1 protocol ip permit
!
control-plane
!
!
line con 0
no modem enable
line aux 0
line vty 0 4
password xxxxxxxxxx
login
!
scheduler max-task-time 5000
end
Any help greatly appreciated.
10-24-2007 06:35 AM
hi,
please add:
"ip nat inside"
"ppp ipcp dns request"
"ppp ipcp router default"
under dialer0 interface.
Then if you want your wireless functional, configure:
int vlan0
no ip address
bridge-group 1
no ip nat inside
ip route-cache
int dot11radio0
bridge-group 1
ip route-cache
no shutdown
int bvi1
ip address
ip nat inside
bridge irb
bridge 1 route ip
After that do "show ip route" and try to ping to address shoiwn to route for 0.0.0.0/0
If nothing works can be an issue with ADSL FW, in which case you should access the newer FW at:
ftp://fpt.cisco.com/access/800
The one you want 3.0.31 (or like). There is a document for installation in the same ftp directory.
Hope this helps, please rate post if it does!
10-25-2007 01:04 AM
Hi,
Thanks for your help.
I tried adding those parameters to the dialer 0 interface but the ADSL still does not work.
I have downloaded the firmware as suggested. Do I need to use the ROM monitor to copy this across to the router?
Thanks
10-25-2007 04:34 AM
Replace the above mentioned 'ip nat inside' on the dialer with 'ip nat outside'.
That should do it.
10-25-2007 04:34 AM
Oh, and remove the 'ip nat outside' on the ATM interface.
11-20-2007 10:44 AM
Sorry, this may not be much help but I had the same issues. After many long phone calls to Cisco it appears that BT don't use the same hardware at each exchange and some of these exchanges play merry hell with this router. I dropped in an 837 and never had another problem( except that I had a seperate wireless lynsys ap)
HTH
11-20-2007 12:08 PM
Hi,
which firmware was not working for you ? I've seen 3.0.14 fix all and any case so far.
11-20-2007 11:31 PM
Hi,
p.bevilacqua: I did upgrade the firmware but this didn't make any difference, but i don't think the issue was related to the firmware.
I did get the ADSL to work in the end by adding
dsl operating-mode ansi-dmt
to the ATM0 interface.
It seemed that when left in 'operating-mode auto' the router would not negotiate with the exchange.
11-22-2007 02:54 PM
Good find, altough ansi mode for a dslam in Europe is a bit strange.
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