5-4
Cisco 7204 Installation and Configuration Guide
OL-5101-01
Chapter5 Troubleshooting the Installation
Troubleshooting Overview
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The IO power OK LED comes on immediately and indicates that the I/O controller is rece iving
DC power from the router midplane. This LED comes on during a successful router boot and
remains on during normal operation of the router.
If this LED remains off when starting the router, either there is a problem with the pow er supply
(it is damaged or not connected to the router midplane), or the network processing e ngine or the
I/O controller are not connected to the router midplane. Proceed to th e “T roubleshooting the I/O
Controller” section on page5-6 later in this chapter.
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The enabled LED comes on after the IO power OK LED a nd in dic ate s tha t t he ne twork
processing engine and the I/O controller are enabled for operation by the system; however, it
does not mean that the Fast Ethernet port on the I/O controller is functional or enabled. This
LED comes on during a successful router boot and remains on during normal operation of the
router.
If this LED remains off when starting the router, it is probably a problem with the network
processing engine or the I/O controller (they are damaged or not connected to the router
midplane). Proceed to the “Troubleshooting the I/O Controller” section on page 5-6.
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The FE enabled LED comes on after the enabled LED and indicates that the Fast Ethernet port
on the I/O controller is initialized and enabled for operation by t he sy ste m. Th is L ED c omes o n
during a successful router boot and remains on during normal operation of the router.
If this LED remains off when starting the router, it is probably a problem with the F ast Et hernet
port on the I/O controller. Proceed to the “Troubleshooting the I/O Controller” section on
page 5-6.
Note The I/O controller without the Fast Ethernet port does not hav e the FE enabled LED an d the
FE link LED. The I/O controller without the Fast Ethernet port and the I/O controller that is
equipped with a single MII port do not have the MII enabled, RJ-45 enabled, and RJ-45 link
LEDs.
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The FE link LED comes on only when the Fast Ethernet port on the I/O cont ro ller is r ece iving
a carrier signal from the network. This LED remains off during normal ope rat ion o f the ro uter
unless there is an incoming carrier signal, and does not indicate startup problems.
If this LED remains off when starting the router, it is probably a problem with the F ast Et hernet
port on the I/O controller. Proceed to the section “Troubleshooting the I/O Controller” section
on page 5-6.
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The MII enabled LED comes on after the enabled LED and indicates that the Fast Ethernet
port’s MII port is initialized and enabled for operation by the system, and configured for
operation. This LED comes on during a successful router boot and after the MII port has been
configured as the media type for the Fast Ethernet port (the RJ-45 port is the defau lt media type
for the Fast Ethernet port). This LED remains on during n orm al ope rat ion of the r oute r.
If this LED remains off when starting the router, it is probably a problem with the F ast Et hernet
port on the I/O controller. Proceed to the section “Troubleshooting the I/O Controller” section
on page 5-6.
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The RJ-45 enabled LED comes on after the enabled LED and indicates that the Fast Ethern et
port’s RJ-45 port (the default media type for the Fast Ethernet port) is initialized and enabled
for operation by the system. This LED comes on during a successful router boot and remains on
during normal operation of the router.
If this LED remains off when starting the router, it is probably a problem with the F ast Et hernet
port on the I/O controller. Proceed to the “Troubleshooting the I/O Controller” section on
page 5-6 .