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7-47

ADSL WAN Connections

Troubleshooting the ADSL Connection

When troubleshooting WAN connections, you should try to isolate the prob-

lem and determine if the problem is occurring on the physical interface or the

logical interface. With an ADSL WAN connection, you should begin trouble-

shooting the ADSL interface.

Troubleshooting the ADSL Interface

Your first tool in troubleshooting is always the show command. To trouble-

shoot the ADSL interface, enter the following command from the enable mode

context:

Syntax: show interfaces adsl <slot>/<port>

Replace <slot> with the slot where the ADSL interface is installed, and replace

<port> with 1.

If the status of the physical interface is administratively down, you should

activate it by entering no shutdown from the ADSL interface configuration

mode context. If the physical interface is down, you must fix a problem on the

Physical Layer level.

Identifying the Problem

You should first check the ADSL configurations. The interface readout indi-

cates the training-mode standard next to “Link Status.” Verify that this stan-

dard matches that used by your service provider. If you have configured the

interface to use a different training mode than that used by the service

provider, the physical connection cannot be established.

In Figure 7-21, for example, the show interfaces adsl command shows that

the Physical Layer and the Data Link Layer are down. In this case, the training

mode set on the router did not match the training mode set on the DSLAM.

The “Training” setting was reported as unknown.

HP ProCurve 7000dl Series User Manual

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