Troubleshooting guide

<last ip address> netmask <subnet mask>
Router(config)#end
Static NAT, if Internet users require access to internal servers.
Router(config)#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
Router(config)#end
(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
Router(config)#ip dhcp excluded−address <ip address of ethernet0>
Router(config)#ip dhcp pool <dhcp pool name>
Router(dhcp−config)#network <ip network address of ethernet0> <subnet mask>
Router(dhcp−config)#default−router <ip address of ethernet0>
Router(dhcp−config)#dns−server <ip address of primary dns server>
<ip address of secondary dns server>
Router(dhcp−config)#end
10.
Enable logging console on the Cisco DSL Router, and then write all the changes to memory.
Router#configure terminal
Router(config)#logging console
Router(config)#end
*Jan 1 00:00:00.100: %SYS−5−CONFIG_I: Configured from console by console
Router#write memory
Building configuration... [OK]
Router#
11.
View Your Configuration
Your Cisco DSL Router should now be operational for Asymmetric Digital Subscriber Line (ADSL) service.
You can issue a show run command to see the configuration.
Router#show run
Building configuration...
Configuration
Shown below is the configuration you built in the previous section, "Step−by−Step Configuration".
Cisco DSL Router with a Static IP Address
!−−− Comments contain explanations and additional information.
service timestamps debug datetime msec
service timestamps log datetime msec
!
bridge irb
!
ip subnet−zero
!
ip dhcp excluded−address <ip address of ethernet0>
ip dhcp pool <dhcp pool name>
network <ip network address of ethernet0> <subnet mask>
default−router <ip address of ethernet0>
dns−server <ip address of dns server>
!
Cisco DSL Router Configuration and Troubleshooting Guide