Determining Hardware Status
Determining Operating Status
5-5
Controller Cards
A controller card has the following LEDs; see Figure 5-3:
• Four equipment LEDs—Indicate current card status
• One synchronization and two external timing LEDs—Indicate the status of any connected external
timing source
• Two facility LEDs—Indicate status of the Ethernet port
Table 5-4 lists the equipment LEDs, which indicate current status of the card.
Table 5-4
Equipment LEDs on Controller Cards
Label
Activity
Color
Description
FAIL
On
Red
A failure exists on the controller card.
1
1. A failure can be total, partial, or forced. Failure on any part of the card, including failure of any of its ports, results in the FAIL LED being
lit.
Blinking
Red
Standby controller is being synchronized with the active controller.
2
2. The synchronization process is not affected by traffic card installation and removal; the active controller, and hence the system,
continues to be responsive to traffic forwarding and continues to detect and notify the administrator of any faults that occur while the
standby controller is being synchronized.
Off
None
No failure exists on the controller card.
ACTIVE
On
Green
This controller card is active and is providing or capable of providing service.
Off
None
This controller card is either on standby (the STDBY LED is lit) or has failed (the
FAIL LED is lit).
STDBY
On
Yellow
This controller card is the standby controller for the system.
Off
None
This controller card is either the active controller for the system (the ACTIVE LED
is lit) or has failed (the FAIL LED is lit).
CF
ACTIVE
Blinking
Green
The Microdrive or compact-flash card in the external slot in the active controller
card is being read or written.
Off
None
No read or write operation on the Microdrive or compact-flash card is in progress.
Caution
Risk of data loss. Do not remove a Microdrive or compact-flash card from its external slot while
the CF ACTIVE LED is blinking; you can lose data that is being transferred to the device if you
enter the
unmount /md
command in exec mode before the data transfer operation is complete.
To reduce the risk, you must wait until the CF ACTIVE LED is off; then enter the
unmount /md
command in exec mode to prepare the Microdrive or compact-flash card for removal.
Caution
Risk of equipment failure. Removing the Microdrive or compact-flash card from the external
slot without first entering the
unmount /md
command can permanently damage the device and
cause the kernel to crash. To reduce the risk, always enter the
unmount
/md
command in exec
mode before removing a Microdrive or compact-flash card.