Troubleshooting guide

interface ethernet0
no shut
ip address <ip address> <subnet mask>
ip nat inside
no ip directed−broadcast
!
interface atm0
no shut
no ip address
no ip directed−broadcast
no atm ilmi−keepalive
pvc <vpi/vci>
encapsulation aal5snap
!−−− Common PVC values supported by ISPs are 0/35 or 8/35.
!−−− Confirm your PVC values with your ISP.
!
bridge−group 1
!
interface bvi1
ip address <ip address> <subnet mask>
ip nat outside
no ip directed−broadcast
!
ip nat inside source list 1 interface bvi1 overload
!−−− If you have a pool (a range) of public IP addresses provided
!−−− by your ISP, you can use a NAT Pool. Replace
!−−− ip nat inside source list 1 interface bvi1 overload
!−−− with the following two configuration statements:
!−−− ip nat inside source list 1 pool <nat pool name> overload
!−−− ip nat pool <nat pool name> <first ip address> <last ip address>
!−−− netmask <subnet mask>
!−−− If Internet users require access to an internal server, you can
!−−− add the following static NAT configuration statement:
!−−− ip nat inside source static tcp <inside ip address of server> {80 or 25}
!−−− <outside well−known ip address of server> {80 or 25} extendable
!−−− Note: TCP port 80 (HTTP/web) and TCP port 25 (SMTP/mail) are used
!−−− for this example. You can open other TCP or UDP ports, if needed.
!
ip classless
ip route 0.0.0.0 0.0.0.0 <default gateway to isp>
access−list 1 permit <ip network address of ethernet0> <wildcard mask>
!−−− In this configuration, access−list 1 defines a standard access list
!−−− permitting the addresses that NAT will translate. For example, if
!−−− your private IP network was 10.10.10.0, configuring
!−−− access−list 1 permit 10.10.10.0 0.0.0.255 would allow NAT to translate
!−−− packets with source addresses between 10.10.10.0 and 10.10.10.255.
!
bridge 1 protocol ieee
bridge 1 route ip
!
end
Troubleshoot Your Configuration
If your ADSL service is not working properly, see Troubleshooting RFC1483 Bridging with IRB.
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Cisco DSL Router Configuration and Troubleshooting Guide