Check the T640 Routing Node Routing Engine LEDs

Figure 51 shows the host module LEDs on the T640 routing node craft interface.

Figure 51: T640 Routing Node Redundant Host Module LEDs

Each host subsystem has three LEDs, located on the upper right of the craft interface, which indicate status. The LEDs labeled HOST0 show the status of the Routing Engine in slot RE0 and the Control Board in slot CB0. The LEDs labeled HOST1 show the status of the Routing Engine in slot RE1 and the Control Board in slot CB1. Table 42 describes the functions of the host subsystem LEDs.

Table 42: T640 Routing Node Host Subsystem LEDs

Label	Color	State	Description
OK	Green	On steadily	Host module is online and functioning normally.
FAIL	Red	On steadily	Host module is offline.
MASTER	Green	On steadily	Host module is functioning as master.