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3-3
Cisco 800 Series Routers Hardware Installation Guide
78-5373-04
Chapter 3 Troubleshooting
Problems After First Startup
Problems After First Startup
Table 3-2 lists problems that could occur after the router has power for the first time.
Table 3-2 Problems After First Startup
Symptom Problem Solutions
No link to an Ethernet
device. (On Cisco 801,
Cisco 802, and 802
IDSL routers, the LINK
LED on the back panel
is off. On Cisco 803 and
804 routers, the LKØ,
LK1, LK2, or LK3 LED
on the front panel is off.
On the Cisco 804 IDSL
router, the ETHERNET
1, 2, 3, or 4 LED on the
front panel is off.)
• A cable-related
problem:
–
Wrong cable.
–
Improperly
connected cable.
–
Damaged cable.
Perform the following tasks in the following
order:
• If you supply your own cable, make sure
you are using the right type of cable (either
straight-through or crossover). Check the
cable information in Table 2-2 in Chapter 2,
“Installation.”
• Check specifications in Table B-13 and
Table B-14 in Appendix B, “Specifications
and Cables,” to make sure the cable
complies. If it does not, replace it.
• To make sure you have cabled the devices
correctly, see Table 2-2 in Chapter 2,
“Installation.”
• Make sure the connectors at both ends of
the cable are securely seated.
• Make sure the cable is not physically
damaged. If it is, replace it.
• Improperly set router
HUB/NO HUB or
TO HUB/TO PC
button or hub
equivalent of
HUB/NO HUB button
• To make sure you have set buttons correctly,
see Table 2-2 in Chapter 2, “Installation.”
• Improperly
functioning network
interface card (NIC)
on server, PC, or
workstation.
• Run the NIC diagnostic supplied by the
vendor to make sure it is functioning
properly. If it is not, replace it.
• If the problem continues, call your Cisco
reseller.
No link to ISDN or
IDSL network. (NT1,
LINE, CH1, CH1 RXD,
CH1 TXD, CH2, CH2
RXD, or CH2 TXD
LED is off.)
• If you have a
Cisco 801 or 803
router in North
America or in parts of
Europe, you might
need to connect the
router to an external
NT1 and connect the
NT1 to an ISDN wall
jack.
• If outside of North America, contact your
telephone service provider and ask if you
must provide an NT1 and the ISDN U cable
that connects the NT1 to the ISDN wall
jack. In North America, you must provide
an NT1 and the ISDN U cable. Connect
NT1 as described in the “Connecting an
ISDN Line to Cisco 801 and Cisco 803
Routers” section in Chapter 2,
“Installation.”