Problem Cisco 877 no t'internet - help!

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Hi Chaps,

Firstly i'm new here so a big hello to all!

Secondly, have been thrown in at the deep end with a Cisco 877 and cant for the life figure out why the router isnt getting an IP from the BT DHCP pool.

Any help would be MUCHLY appreciated.

Heres my config.....


version 12.4
no service pad
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname <hostname>
!
boot-start-marker
boot-end-marker
!
logging message-counter syslog
no logging buffered
enable secret 5 <password>
!
no aaa new-model
!
crypto pki trustpoint TP-self-signed-1186632268
enrollment selfsigned
subject-name cn=IOS-Self-Signed-Certificate-1186632268
revocation-check none
rsakeypair TP-self-signed-1186632268
!
!
crypto pki certificate chain TP-self-signed-1186632268
certificate self-signed 02 nvram:IOS-Self-Sig#6.cer
dot11 syslog
ip source-route
ip dhcp excluded-address 192.168.0.254
!
ip dhcp pool <DHCP POOL>
import all
network 192.168.0.0 255.255.255.0
default-router 192.168.0.254
dns-server <isp dns servers>
!
!
ip cef
ip name-server <dns1>
ip name-server <dns2>
ip name-server <internal dns>
ip ddns update method sdm_ddns1
DDNS both
!
ip ddns update method sdm_ddns2
DDNS both
!
!
!
!
!
username <me> privilege 15 secret 5 <password>
username <colleague> privilege 15 secret 5 <password>
!
!
!
archive
log config
hidekeys
!
!
!
!
!
interface ATM0
description WAN interface to BT using DHCP
mtu 1500
no ip address
no ip redirects
no ip unreachables
no ip proxy-arp
ip flow ingress
ip route-cache policy
no atm ilmi-keepalive
pvc 0/38
encapsulation aal5mux ppp dialer
dialer pool-member 1
!
dsl operating-mode auto
!
interface ATM0.1 point-to-point
description WAN OUTSIDE
ip nat outside
ip virtual-reassembly
!
interface FastEthernet0
!
interface FastEthernet1
!
interface FastEthernet2
!
interface FastEthernet3
!
interface Vlan1
description LAN Inside Interface
ip address 192.168.0.1 255.255.255.0
no ip redirects
no ip unreachables
no ip proxy-arp
!
interface Dialer1
ip ddns update hostname <isp hostname>
ip ddns update sdm_ddns2
ip address negotiated
ip nat outside
ip virtual-reassembly
encapsulation ppp
dialer pool 1
ppp authentication pap callin
ppp pap sent-username <username from ISP> password 0 <ISP password>
!
interface Dialer0
ip address <Public IP> <Subnet>
no ip redirects
no ip unreachables
no ip proxy-arp
ip flow ingress
ip nat outside
ip virtual-reassembly
encapsulation ppp
dialer pool 1
dialer-group 1
no cdp enable
ppp authentication pap callin
ppp pap sent-username <ISP Username> password 0 <ISP Password>
!
ip forward-protocol nd
ip route 0.0.0.0 0.0.0.0 Dialer1
ip route 0.0.0.0 0.0.0.0 Dialer0
ip http server
ip http access-class 3
ip http authentication local
ip http secure-server
ip http timeout-policy idle 5 life 86400 requests 10000
!
ip nat pool BTPUBLIC <Public IP range>
ip nat inside source list 1 interface Dialer0 overload
!
ip access-list standard VTY-ACL
permit 192.168.0.0 0.0.0.255
!
access-list 1 permit any
access-list 1 permit 192.168.0.0 0.0.0.255
access-list 3 remark HTTP Access-class list
access-list 3 remark SDM_ACL Category=1
access-list 3 permit 192.168.0.0 0.0.0.255
access-list 3 deny any
!
!
!
!
control-plane
!
!
line con 0
no modem enable
line aux 0
line vty 0 4
access-class VTY-ACL in
password <password 4 Telnet>
login local
transport input telnet
!
scheduler max-task-time 5000
end

 

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Hi markyzno,

I notice you have two dialer interfaces configured, and you have an atm subinterface but you are not using it. I would suggest some changes to the configuration:

Remove the atm0.1 subinterface.

no ip route 0.0.0.0 0.0.0.0 Dialer0
no interface Dialer0

int dialer1
dialer-group 1

int atm0
ip nat outside

dialer-list 1 protocol ip permit

no ip nat inside source list 1 interface Dialer0 overload
ip nat inside source list 1 interface Dialer1 overload

You might want to try setting the atm0 mtu to 1478 - this is slightly more efficient, but not needed.

Also, your dhcp pool default-router and excluded address don't match the router's internal ip address.

And of course check all the usual stuff, username, password vpi/vci, make sure interfaces are not shutdown, etc.


Spice_Weasel

 

Many thanks for the heads up, changing the conf as we speak and when the office is quiet will unleash the new conf and hopefully t-internet, will keep you posted

 

So, new conf looks like this........ Thoughts (havent tested as yet)?

Using 2963 out of 131072 bytes
!
version 12.4
no service pad
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname <hostname>
!
boot-start-marker
boot-end-marker
!
logging message-counter syslog
no logging buffered
enable secret 5 <password>
!
no aaa new-model
!
crypto pki trustpoint TP-self-signed-1186632268
enrollment selfsigned
subject-name cn=IOS-Self-Signed-Certificate-1186632268
revocation-check none
rsakeypair TP-self-signed-1186632268
!
!
crypto pki certificate chain TP-self-signed-1186632268
certificate self-signed 01 nvram:IOS-Self-Sig#6.cer
dot11 syslog
ip source-route
ip dhcp excluded-address 192.168.0.254
!
ip dhcp pool <pool name>
import all
network 192.168.0.0 255.255.255.0
default-router 192.168.0.254
dns-server <name servers>
!
!
ip cef
ip name-server <dns 1 from BT>
ip name-server <dns 2 from BT>
ip name-server <dns 3 Internal DNS server>>
ip ddns update method sdm_ddns1
DDNS both
!
ip ddns update method sdm_ddns2
DDNS both
!
!
!
!
!
username <my name> privilege 15 secret 5 <password>
username <my name 2> privilege 15 secret 5 <password>
!
!
!
archive
log config
hidekeys
!
!
!
!
!
interface ATM0
description WAN interface to BT using DHCP
mtu 1478
no ip address
no ip redirects
no ip unreachables
no ip proxy-arp
ip flow ingress
ip nat outside
ip virtual-reassembly
ip route-cache policy
no atm ilmi-keepalive
pvc 0/38
encapsulation aal5mux ppp dialer
dialer pool-member 1
!
dsl operating-mode auto
!
interface FastEthernet0
!
interface FastEthernet1
!
interface FastEthernet2
!
interface FastEthernet3
!
interface Vlan1
description LAN Inside Interface
ip address 192.168.0.1 255.255.255.0
no ip redirects
no ip unreachables
no ip proxy-arp
!
interface Dialer1
ip ddns update hostname <BT gateway hostname>
ip ddns update sdm_ddns2
ip address negotiated
ip nat outside
ip virtual-reassembly
encapsulation ppp
dialer pool 1
dialer-group 1
ppp authentication pap callin
ppp pap sent-username <BT log in> password 0 <BT password>
!
ip forward-protocol nd
ip route 0.0.0.0 0.0.0.0 Dialer1
ip http server
ip http access-class 3
ip http authentication local
ip http secure-server
ip http timeout-policy idle 5 life 86400 requests 10000
!
ip nat pool BTPUBLIC <public IP range> netmask 255.255.255.240
ip nat inside source list 1 interface Dialer1 overload
!
ip access-list standard VTY-ACL
permit 192.168.0.0 0.0.0.255
!
access-list 1 permit any
access-list 1 permit 192.168.0.0 0.0.0.255
access-list 3 remark HTTP Access-class list
access-list 3 remark SDM_ACL Category=1
access-list 3 permit 192.168.0.0 0.0.0.255
access-list 3 deny any
dialer-list 1 protocol ip permit
!
!
!
!
control-plane
!
!
line con 0
no modem enable
line aux 0
line vty 0 4
access-class VTY-ACL in
password <Telnet password>
login local
transport input telnet
!
scheduler max-task-time 5000
end

 

I would also recommend disabling http server as well.

 

still no joy.....

Am starting to think that BT Business Broadband might be the issue here.

Will run various debugs later.

 

starting to pull my hair out now

latest conf...

CD light is green, rx and tx lights flutter and shes trying to connect to BT but its not picking up an IP address from BT....

Any ideas much appreciated, have kept in ip http server so i can quickly cross check things on the GUI.

I know theres a couple of entries for internal DHCP but its Internet facing i am concerned with....

version 12.4
no service pad
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname <name>
!
boot-start-marker
boot-end-marker
!
logging message-counter syslog
no logging buffered
enable secret 5 <password>
!
no aaa new-model
!
crypto pki trustpoint TP-self-signed-1186632268
enrollment selfsigned
subject-name cn=IOS-Self-Signed-Certificate-1186632268
revocation-check none
rsakeypair TP-self-signed-1186632268
!
!
crypto pki certificate chain TP-self-signed-1186632268
certificate self-signed 01 nvram:IOS-Self-Sig#6.cer
dot11 syslog
ip source-route
ip dhcp excluded-address 192.168.0.0 192.168.0.254
!
ip dhcp pool <name>
dns-server 192.168.0.2
default-router 192.168.0.254
!
!
ip cef
ip ddns update method sdm_ddns1
DDNS both
!
ip ddns update method sdm_ddns2
DDNS both
!
ip address-pool dhcp-pool
ip dhcp-server 192.168.0.2
!
!
!
!
username <me> privilege 15 secret 5 <password>
username <company> privilege 15 secret 5 <password>
!
!
!
archive
log config
hidekeys
!
!
!
!
!
interface ATM0
description BT using DHCP
mtu 1478
no ip address
no ip redirects
no ip unreachables
no ip proxy-arp
ip flow ingress
ip nat outside
ip virtual-reassembly
ip route-cache policy
no atm ilmi-keepalive
pvc 0/38
encapsulation aal5mux ppp dialer
dialer pool-member 1
!
dsl operating-mode auto
!
interface FastEthernet0
!
interface FastEthernet1
!
interface FastEthernet2
!
interface FastEthernet3
!
interface Vlan1
description LAN Inside Interface
ip address 192.168.0.254 255.255.255.0
no ip redirects
no ip unreachables
no ip proxy-arp
!
interface Dialer1
ip address negotiated
ip nat outside
no ip virtual-reassembly
encapsulation ppp
dialer pool 1
dialer-group 1
ppp authentication chap callin
ppp chap hostname <BT username>
ppp chap password 0 <Bt Password>
ppp pap sent-username <Bt username> password 0 <password>
!
ip forward-protocol nd
ip route 0.0.0.0 0.0.0.0 Dialer1
ip http server
ip http access-class 3
ip http authentication local
ip http secure-server
ip http timeout-policy idle 5 life 86400 requests 10000
!
ip nat inside source list 1 interface Dialer1 overload
!
ip access-list standard VTY-ACL
permit 192.168.0.0 0.0.0.255
!
access-list 1 permit any
access-list 1 permit 192.168.0.0 0.0.0.255
access-list 3 remark HTTP Access-class list
access-list 3 remark SDM_ACL Category=1
access-list 3 permit 192.168.0.0 0.0.0.255
access-list 3 deny any
dialer-list 1 protocol ip permit
!
!
!
!
control-plane
!
!
line con 0
no modem enable
line aux 0
line vty 0 4
access-class VTY-ACL in
password <telnet password>
login local
transport input telnet
!
scheduler max-task-time 5000
end


cheers chaps.

 

You should run a debugger, if that does not help contact a Cisco service provider

 

Braaaiiiiinnnnmssssss!!!!!!


This thread is over a year old. Just a guess, but I think the problem has been solved one way or another.