Step 3: Check the Redundant 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 232).

Figure 232: 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 128 describes the SSB LEDs.

Table 128: SSB LED States

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.