Cisco config - BT business ADSL

Finglas Incubus

Is there anyone out there using a Cisco router on BT business ADSL who would be willing to share a copy of a working config? I'm having some difficulty getting connected with a Cisco 837, an old Eircom Netopia connects fine so I know the line is working.

I get 'showtime' on the ATM interface and the dialer is up but somethings not quite right. Relevent config below:

interface ATM0
no ip address
no ip mroute-cache
no atm ilmi-keepalive
dsl operating-mode auto
pvc 8/35
encapsulation aal5snap

interface Dialer0
ip address negotiated
ip access-group acl-to-internet out
ip mtu 1492
ip nat outside
ip virtual-reassembly
encapsulation ppp
dialer pool 1
dialer-group 1
no cdp enable
ppp authentication pap chap callin
ppp chap hostname xxxxxxx
ppp chap password 7 xxxxxx
ppp pap sent-username xxxxx password 7 xxxxx

Debug atm ilmi output:

*Apr 23 23:55:19.153: ILMI(ATM0): No ILMI VC found
*Apr 23 23:55:19.153: ILMI: Encapsulation error on o/g ILMI Pdu <ilmi_send_pkt>
(ATM0)
Apr 23 23:55:07.157: ILMI: Unable to Send Pdu out <ilmi_send_trap>PQUICC_FEC: P
HY 1A Read reg = 0 val = 800

CJ

cpu-dude

Finglas Incubus wrote: »

Is there anyone out there using a Cisco router on BT business ADSL who would be willing to share a copy of a working config? I'm having some difficulty getting connected with a Cisco 837, an old Eircom Netopia connects fine so I know the line is working.

Encapsulation should be LLC, not VC. That's why your getting the VC Not Found error.

Finglas Incubus

cpu-dude wrote: »

Encapsulation should be LLC, not VC. That's why your getting the VC Not Found error.

Doesn't 'aal5snap' infer LLC?

CJ

cpu-dude

Finglas Incubus wrote: »

Doesn't 'aal5snap' infer LLC?

CJ

That's what I was also wondering too but why else would you get a VC not found error.

Can I see a screenshot of the route configuration page?

Alun

I don't have any encapsulation set on my 877W on Eircom.

interface ATM0
no ip address
no atm ilmi-keepalive
dsl operating-mode auto

!
interface ATM0.1 point-to-point
pvc 8/35
pppoe-client dial-pool-number 1

Finglas Incubus

Thanks for the comments guys, it got me thinking and I managed to solve the issue. Copy of config below for the benefit of others. In a nutshell, specifying 'pppoe-client dial-pool-number ' (thanks Alun ) on the PVC solved the issue. Interestingly, I still get the same ILMI VC errors on debug but the link works fine. I switched to an 877 (not that it should make any difference).

!
no aaa new-model
ip cef
no ip dhcp use vrf connected
ip dhcp excluded-address 192.168.1.254
ip dhcp excluded-address 192.168.1.250
!
ip dhcp pool guestpool1
network 192.168.1.0 255.255.255.0
dns-server x.x.x.x x.x.x.x
default-router 192.168.1.254
lease 3
!
!
ip domain name xxx.xxx
ip name-server x.x.x.x
ip name-server x.x.x.x
!
interface ATM0
no ip address
no atm ilmi-keepalive
pvc 8/35
encapsulation aal5snap
pppoe-client dial-pool-number 1
!
dsl operating-mode auto
!
interface FastEthernet0
duplex full
speed 100
!
interface FastEthernet1
!
interface FastEthernet2
shutdown
!
interface FastEthernet3
shutdown
!
interface Vlan1
ip address 192.168.1.254 255.255.255.0
ip nat inside
ip virtual-reassembly
!
interface Dialer0
ip address x.x.x.x 255.255.255.252
ip access-group acl-to-internet out
ip mtu 1492
ip nat outside
ip virtual-reassembly
encapsulation ppp
dialer pool 1
dialer-group 1
no cdp enable
ppp authentication pap chap callin
ppp chap hostname xxxxxxxxxxx
ppp chap password 7 xxxxxxxxxxx
ppp pap sent-username xxxxxxxxxxx password 7 xxxxxxxxxxx
!
ip route 0.0.0.0 0.0.0.0 Dialer0
!
no ip http server
no ip http secure-server
ip nat inside source list 1 interface Dialer0 overload
!
ip access-list extended acl-to-internet
permit tcp any any eq www
permit tcp any any eq 443
permit tcp any any eq ftp
permit tcp any any eq ftp-data
permit tcp any any eq telnet
permit icmp any any
permit tcp any any eq 1352
permit tcp any any eq 161
permit udp any any eq snmp
permit tcp any any eq 162
permit udp any any eq snmptrap
permit udp any any range 1645 1646
permit tcp any any eq 1812
permit udp any any eq 1812
permit tcp any any eq 1813
permit udp any any eq 1813
permit udp any any eq syslog
permit tcp any any eq 1863
permit tcp any any eq 8802
permit udp any any range 3478 3479
permit udp any range 23000 23003 any
permit udp any any eq 5200
permit udp any any eq ntp
permit udp any any eq 8743
permit udp any any range 5060 5062
permit udp any any range 9000 9005
permit tcp any any eq domain
permit udp any any eq domain
deny tcp any any eq 4444
deny tcp any any eq 707
deny tcp any any eq 5554
deny tcp any any range 137 139
deny udp any any range netbios-ns netbios-ss
deny tcp any any eq 135
deny udp any any eq 135
deny tcp any any eq 445
deny udp any any eq 445
!
access-list 1 permit 192.168.1.0 0.0.0.255
dialer-list 1 protocol ip permit
no cdp run
!
!
!
control-plane
!
!
line con 0
exec-timeout 0 0
no modem enable
stopbits 1
line aux 0
line vty 0 4
exec-timeout 120 0
login
!
scheduler max-task-time 5000
end

CJ

Alun

The errors might just be warnings and could well be down to a debug level being set, try 'sho debugging' to see, and if so do a 'no debug atm ilmi atm 0' in config mode to stop them.