Step 3: Check the SSB LEDs

Periodically check the SSB LEDs to verify that the SSB is online or offline and the type of task it is performing.

Action

To check the SSB LEDs, look on the faceplate at the front of the router (see Figure 166).

Figure 166: SSB LEDs

The SSB has two groups of LEDs: online/offline LEDs and status LEDs. The online/offline LEDs indicate whether the SSB is online or offline. The status LEDs indicate what type of task the SSB is performing. Table 95 describes the LED states.

Table 95: SSB LEDs

Label	Color	State	Description
OFFLINE	Amber	On steadily	SSB is offline.
ONLINE	Green	On steadily	SSB processor is running.
MASTER	Blue	On steadily	SSB is master.
STATUS (left)	Green	Blinking	SSB processor is running. Normally, the blinking is faint and becomes bright only when the SSB is processing many exceptions.
STATUS (right)	Green	Flashing	I/O interrupts are occurring.