Cisco Router 877 configuration in the UK with BT internet

Few weeks back I had to do an installation for my work in the UK.
We had some problems to get the connection correct. And I had to find out which configuration I had to use.

The main problem we found was which configuration we needed. Because me and my colleague are used to configure Dutch Internet Connections with Dutch ISP’s.

But aftersome search I found the correct configuration we needed. And below is what you need to use.

interface ATM0
 description ADSL Britisch Telecom number : <telephonenumber> order nummer : <ordernumber>
 no ip address
 ip route-cache policy
 ip route-cache flow
 no atm ilmi-keepalive
 pvc 0/38
  encapsulation aal5mux ppp dialer
  dialer pool-member 10
 dsl operating-mode auto
interface Vlan1
 description LAN < network information >
 ip address < ip address> <subnetmask>
 ip nat inside
 ip virtual-reassembly
 ip route-cache same-interface
 ip route-cache policy
 ip route-cache flow
 ip tcp adjust-mss 1452
 hold-queue 100 in
 hold-queue 100 out
interface Dialer10
 description ADSL Britisch Telecom on number : < telephonenumber> order nummer : <ordernumber>
 ip address negotiated
 ip access-group ACL_DIALER10_IN in
 ip access-group ACL_DIALER10_OUT out
 no ip redirects
 no ip unreachables
 no ip proxy-arp
 ip mtu 1492
 ip nat outside
 ip inspect FW_DIALER10_IN in
 ip inspect FW_DIALER10_OUT out
 ip virtual-reassembly
 encapsulation ppp
 ip route-cache policy
 ip route-cache flow
 dialer pool 10
 dialer idle-timeout 0
 dialer-group 10
 no cdp enable
 ppp authentication chap pap callin
 ppp chap hostname <your BT HOSTNAME>
 ppp chap password <your BT PAssword
 ppp pap sent-username <your BT username> password < your BT password >
 ppp ipcp dns request
 ppp ipcp mask request
 ppp ipcp route default
 ppp ipcp address accept
ip route Dialer10
ip cef
ip access-list extended ACL_DIALER10_IN
 remark DHCP <IPS>
 permit udp any any eq bootpc
 permit udp any any eq bootps

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