Troubleshooting guide

Is your ISP providing a dynamically
generated IP address?
Yes No
What is the IP address of the ISP's default
gateway (also called the next hop
address)?
ISP Default Gateway IP Address
Record Information About Your Network
Record the following information about your private network. This information is not related to the ISP.
Are you performing Network Address
Translation (NAT) on your private
network?
Yes No
Are you configuring the Cisco DSL
Router to act as a Dynamic Host Control
Protocol (DHCP) server?
Yes No
What IP address and subnet mask will you
configure on the Ethernet0 interface?
IP Address
Subnet Mask
Choose Your Next Step
When you have all the information you need from your ISP, select one of the following options based on
whether you have a new installation or are troubleshooting an existing one.
New DSL configuration
Troubleshooting my existing DSL connection
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Cisco DSL Router Configuration and Troubleshooting
Guide
Step−by−Step Configuration of PPPoA with a Static IP
Address
Your Internet Service Provider (ISP) has assigned a static public IP address to your Cisco Digital Subscriber
Line (DSL) Router.
Note: A color code is used to relate tasks in this section with examples of configurations in the Configuration
section. Configurations are color−coded as follows: Dynamic Host Configuration Protocol (DHCP) Server,
Network Address Translation (NAT).
Cisco DSL Router Configuration and Troubleshooting Guide