Troubleshooting guide

Configure the Cisco DSL Router
Configure service timestamp to properly log and display debug output in the troubleshooting
section.
Router#configure terminal
Router(config)#service timestamps debug datetime msec
Router(config)#service timestamps log datetime msec
Router(config)#end
1.
Disable the logging console on your Cisco DSL Router to suppress console messages that may be
triggered while you are configuring the router.
Router#configure terminal
Router(config)#no logging console
Router(config)#end
2.
Configure ip routing, ip subnet−zero, and ip classless to provide flexibility in
routing configuration options.
Router#configure terminal
Router(config)#ip routing
Router(config)#ip subnet−zero
Router(config)#ip classless
Router(config)#end
3.
Configure an IP address and subnet mask on the Cisco DSL Router Ethernet interface.
Router#configure terminal
Router(config)#interface ethernet 0
Router(config−if)#ip address <ip address> <subnet mask>
Router(config−if)#no shut
Router(config−if)#end
4.
Configure the ATM interface of your Cisco DSL Router with the no shut command to bring up the
interface.
Router#configure terminal
Router(config)#interface atm 0
Router(config−if)#no shut
Router(config−if)#end
5.
Configure the ATM subinterface of your Cisco DSL Router with an ATM permanent virtual circuit
(PVC), encapsulation type, and unnumbered Ethernet0 IP address.
Router#configure terminal
Router(config)#interface atm 0.1 point−to−point
Router(config−subif)#ip unnumbered ethernet0
Router(config−subif)#pvc <vpi/vci>
Router(config−subif−atm−vc)#encapsulation aal5snap
Router(config−subif−atm−vc)#end
6.
Configure a default route using ATM0.1 as the outbound interface.
Router#configure terminal
Router(config)#ip route 0.0.0.0 0.0.0.0 atm0.1
Router(config)#end
7.
(Optional) Configure the Cisco DSL Router as a DHCP server with a pool of IP addresses to assign to
hosts connected to the Ethernet interface of the Cisco DSL Router. The DHCP server dynamically
assigns an IP address, Domain Name Server (DNS), and the default gateway IP address to your hosts.
Router#configure terminal
8.
Cisco DSL Router Configuration and Troubleshooting Guide