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 the global Point−to−Point Protocol over Ethernet (PPPoE) parameters.
Router#configure terminal
Router(config)#vpdn enable
Router(config)#no vpdn logging
Router(config)#vpdn−group pppoe
Router(config−vpdn)#request−dialin
Router(config−vpdn−req−in)#protocol pppoe
Router(config−vpdn−req−in)#end
4.
Configure an IP address and subnet mask on the Cisco DSL Router Ethernet interface.
(Optional) Enable NAT inside on the Ethernet interface.
Router#configure terminal
Router(config)#interface ethernet 0
Router(config−if)#ip tcp adjust−mss 1452
!−−− If the ip tcp adjust−mss 1452 command is not supported, try
!−−− ip adjust−mss 1452. If this command is not supported,
!−−− upgrade to the latest Cisco DSL Router software or follow the
!−−− procedure in the Possible Required Configuration Steps on the PC.
Router(config−if)#ip address <ip address> <subnet mask>
Router(config−if)#ip nat inside
Router(config−if)#no shut
Router(config−if)#end
5.
Configure the ATM interface of your Cisco DSL Router with an ATM permanent virtual circuit
(PVC), encapsulation type, and dialer pool.
Router#configure terminal
Router(config)#interface atm 0
Router(config−if)#pvc <vpi/vci>
Router(config−if−atm−vc)#pppoe−client dial−pool−number 1
Router(config−if−atm−vc)#no shut
Router(config−if−atm−vc)#end
6.
Configure the Dialer interface of your Cisco DSL Router for PPPoE with a static IP address.
(Optional) Enable NAT outside on the Dialer interface.
7.
Cisco DSL Router Configuration and Troubleshooting Guide