Checking the Host Subsystem Status

Each host subsystem has three LEDs that display its status. The host subsystem LEDs are located on the right side of the craft interface.

To check the host subsystem status, use the following JUNOS command-line interface (CLI) operational mode command:

user@host> show chassis craft-interface

Sample Output

m320@host> show chassis craft-interface

FPM Display contents:

    +--------------------+

    |router001|

    |2 Alarms active     |

    |R: PEM 1 Not OK     |

    |R: PEM 0 Not OK     |

    +--------------------|

Front Panel System LEDs:

Routing Engine    0    1

--------------------------

OK                *    *

Fail              .    .

Master            *    .

[...Output truncated...]

What It Means

On M320 and T320 routers and T640 routing nodes, the Front Panel System LEDs section of the command output shows the Routing Engine status. The state can be OK, Fail, or Master. An asterisk (*) indicates the operating state.

Alternative Actions

Check the LEDs on the Routing Engine and the Control Board faceplates at the rear of the router.

Check the Routing Engine or Host Subsystem LEDs on the craft interface. If the red LED is lit, look at the LCD display for more information about the cause of the problem.

Figure 122 shows the location of the Routing Engine LEDs on the M320 router craft interface.

Figure 122: M320 Router Host Subsystem Craft Interface LEDs

Table 69 describes the M320 router Routing Engine LED states.

Table 69: M320 Router Routing Engine Craft Interface LEDs

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

Figure 123 shows the location of the Host Subsystem LEDs on the T320 router and T640 routing node craft interface.

Each host subsystem has LEDs, located on the upper right of the craft interface, which indicate its 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.

Figure 123: T320 Router and T640 Routing Node Host Subsystem Craft Interface LEDs

Table 70 describes the T320 router and T640 routing node host subsystem LED states.

Table 70: T320 Router and T640 Routing Node Host Subsystem Craft Interface LEDs

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