Troubleshooting 3-3
Problems After Router is Running
Problems After Router is Running

Table3-2 lists problems that could occur after the router has been up and running.

• Improperly connected
cable.
• To make sure that you have cabled properly, refer to Figure2-5
in Chapter 2, “Installing the Cisco 805 Router.”
• Make sure the connectors at both ends of the cable are securely
seated.
• Improperly functioning
modem or channel
service unit/data
service unit
(CSU/DSU).
• Refer to the documentation that accompanies your modem or
CSU/DSU.
• Router improperly
configured as a DTE or
DCE.
• By default, the router is configured as a DTE. Check the
setting of the clock rate command to determine if it is set
properly. If a clock rate speed is not specified, the router is
configured as a DTE. If a clock rate speed is specified, the
router is configured as a DCE.
Table3-2 Problems After Router is Running
Symptom Problem Solutions
Problems with Ethernet
connection. (The LINK LED on
the back panel is off.)
• A cable-related problem:
— Disconnected cable.
— Damaged cable.
Perform the following tasks in the following
order:
1Make sure the connectors at both ends of the
cable are secure.
2Make sure the cable is not physically damaged.
If it is damaged, order another cable from
Cisco or replace it with a similar cable.
Table3-1 Problems During First Startup (continued)
Symptom Problem Solutions