This document helps you configure your Cisco Digital Subscriber Line
(DSL) Customer Premise Equipment (CPE) Router for Asymmetric Digital Subscriber
Line (ADSL) service. This document explains how to configure ADSL service on
the Cisco SOHO series, 820 series, and ADSL WAN interface cards (WICs). Four
service types are discussed, and a sample configuration is included for each
service. These configurations were built from a Cisco 827 Series router.
There are no specific requirements for this document.
This document is not restricted to specific software and hardware
Technical Tips Conventions for more information on document
Note: When you configure an ADSL WIC, verify the labeling of your ATM
interfaces so that it corresponds with ATM0 and the subinterface ATM0.1 on a
Cisco DSL Router. Refer to the
WIC section for more ADSL WIC cross-platform information such as
hardware and software requirements.
If you are not familiar with the configuration of Cisco devices, the
step-by-step configuration examples can be helpful in guiding you through the
configuration process from start to finish.
The configuration instructions help you to perform these tasks:
Gather required information from your Internet Service Provider
Important: You must have this information in order
to correctly configure your Cisco DSL Router.
The links to the ADSL services in the next section include forms for
you to use in obtaining the required information.
Configure your DSL Router.
Troubleshoot your ADSL service if it does not work properly.
Open a case with the Cisco Technical Assistance Center (TAC) online
or by telephone. This step might be needed if you have used the troubleshooting
procedure and your ADSL service still does not work.
Select a procedure based on the type of ADSL service your ISP provides.
The %IP-4-ZERO_ADDR: Zero MAC address for
<x.x.x.x> in ARP cache error message will appear when the
router cannot read the MAC address stored from the serial EEPROM of the
Complete these steps in order to resolve this issue:
Enable the IP routing command on both
ends of the connection.
Issue the clear arp command on the
Reload the router.