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Step 8ip address negotiated
Example:
Router(config-if)# ip address negotiatedRouter(config-if)#
Specifies that the IP address for the interface is 
obtained through PPP/IPCP (IP Control Protocol) 
address negotiation. The IP address is obtained 
from the peer.
Step...

 
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Configure the Aggregator and ISDN Peer Router
The aggregator is typically a concentrator router where your Cisco router ATM PVC terminates. In the 
configuration example shown below, the aggregator is configured as a PPPoE server to correspond with 
the Cisco
 876 router...

 
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interface Dialer0 ip address 192.168.2.2 255.255.255.0
 encapsulation ppp
 dialer pool 1 dialer string 384020
 dialer-group 1
 peer default ip address pool isdn!
ip local pool isdn 192.168.2.1
ip http serverip classless
ip route 0.0.0.0 0.0.0.0 192.168.2.1
ip route...

 
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CH A P T E R
 
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Troubleshooting
Use the information in this chapter to help isolate problems you might encounter or to rule out the router 
as the source of a problem. This chapter contains the following sections:
 Getting Started
 Before Contacting Cisco or Your Reseller
 ADSL Troubleshooting
 SHDSL Troubleshooting
 ATM Troubleshooting Commands
 Software Upgrade Methods
 Recovering a Lost...

 
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  ADSL Troubleshooting
ADSL Troubleshooting
If you experience trouble with the ADSL connection, verify the following:
 The ADSL line is connected and is using pins 3 and 4. For more information on the ADSL 
connection, see the hardware guide for your router.
 The ADSL CD LED is on. If it is not on, the router may not be connected to the DSL access 
multiplexer (DSLAM)....

 
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ping atm interface Command
Use the ping atm interface command to determine whether a particular PVC is in use. The PVC does 
not need to be configured on the router to use this command. 
Example 14-1 shows the use of this 
command to determine whether PVC 8/35 is in use.
Example 14-1 Determining If a PVC Is in Use
Router# ping atm interface...

 
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     426 packets output, 46282 bytes, 0 underruns     0 output errors, 0 collisions, 2 interface resets
     0 output buffer failures, 0 output buffers swapped out
Router# show interface fastethernet 0
Ethernet0 is up, line protocol is up 
Hardware is PQUICC Ethernet, address is 0000.Oc13.a4db (bia0010.9181.1281)
Internet address is...

 
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show atm interface Command
To display ATM-specific information about an ATM interface, use the show atm interface atm 0 
command from privileged EXEC mode, as shown in 
Example 14-3.
Example 14-3 Viewing Information About an ATM Interface
Router# show atm interface atm 0Interface ATM0:
AAL enabled: AAL5 , Maximum VCs:11, Current VCCs:0
Maximum...

 
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debug atm Commands
Use the debug commands to troubleshoot configuration problems that you might be having on your 
network. The debug commands provide extensive, informative displays to help you interpret any 
possible problems. 
Guidelines for Using Debug Commands
Read the following guidelines before using debug commands to ensure appropriate...