Troubleshooting guide

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Troubleshoot Your Configuration
If your ADSL service is not working properly, see Troubleshooting a PPPoE PC Client.
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Cisco DSL Router Configuration and Troubleshooting
Guide
Cisco DSL Router – Acting as a PPPoE Client with a Static
IP Address
Your Internet Service Provider (ISP) has assigned a single static public IP address to your Cisco Digital
Subscriber Line (DSL) Router.
Tip: If you are not familiar with configuring Cisco devices and would like to follow a step−by−step
configuration, click here.
Tasks to Perform
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).
Design an IP addressing scheme for your private LAN.•
Configure an IP address, subnet mask, and TCP maximum segment size (MSS) adjustment on the
Cisco DSL Router Ethernet interface.
•
Configure the ATM interface (Asymmetric Digital Subscriber Line (ADSL) interface) of the Cisco
DSL Router with an ATM permanent virtual circuit (PVC) and encapsulation.
•
Configure a Point−to−Point Protocol over Ethernet (PPPoE) virtual private data network (VPDN)
group for Cisco IOS®Software later than 12.2(13)T.
•
Create and configure the Dialer interface of the Cisco DSL Router for PPPoE with a static IP address.•
Configure NAT on the Cisco DSL Router to allow sharing of the dynamic public IP address of the•
Cisco DSL Router Configuration and Troubleshooting Guide