Mike's PBX Cookbook

4000 Series LED indicators

The following describes the status LED indications on a 4000 Series Ethernet Routing Switch (ERS).

Switch LED state indicators:

LEDStatusDescription
PwrSolid Green LEDThe switch is receiving power either from the primary or secondary power supply..
LED OffThe switch is not receiving power and not operating.
StatusSolid Green LED• During start-up: The power-on self-test (POST) is complete - operating normally.
• After start-up: The switch is running the agent code successfully.
Flashing Green LEDThe switch is loading the agent software code.
Solid Amber LEDError encountered when running the diagnostic software. (See note)
Flashing Amber LEDThe switch is booting and running diagnostic software. (See note)
LED OffThe switch failed the power-on self-test (POST) or failed to load the agent code.
RPSSolid Green LEDConnected to a redundant power supply unit (RPS) and receiving power if necessary.
Flashing Green LEDConnected to a secondary power supply, but the power input is disconnected. (See note)
Solid Amber LEDThe power supply in slot 1 or slot 2 was removed after operating. (See note)
Flashing Amber LEDThe power supply in slot 1 or slot 2 is present, but not supplying power. (See note)
LED OffNo RPS, the RPS is not supplying power, or the DC/DC module is not supplying power.
Up / DownSolid Green LEDThe switch formed a neighbor with the adjacent switch over Stack up/down cables.
Flashing Green LEDThe switch formed a partial neighbor with the adjacent switch over Stack up/down cables. Check the switch logs.
Solid Amber LEDThe Cascade Up port has detected an error.
LED OffThe switch is in stand-alone mode or no link exists to the Cascade Down port.
BaseSolid Green LEDThe switch is operating as the base unit for the stack.
Flashing Green LEDA configuration error occurred. Multiple or no base units are configured in the stack.
Solid Amber LEDThe switch is operating as the temporary base unit in the stack configuration.
Flashing Green LEDProblem with election of stack base unit. Check only one unit has the base switch on.
Flashing Amber LEDThe switch was not allowed to join the stack (Fast Flash). Check the switch logs.
LED OffThe switch is not the stack base unit or it is operating in stand-alone mode.

Note: Status LED state for ERS 4800 Series and PWR+ models only.

RJ-45 Port LED state indicators

The following list describes the three port LEDs:

Gigabit PoE models: ERS 4524GT-PWR, 4526GTX-PWR and 4548GT-PWR
Fast Ethernet models: ERS 4526T-PWR and 4550T-PWR

LEDStatusDescription
Speed/PoESolid Green LEDPort set to 1000 Mb/s on gigabit PoE models, and 100 Mb/s on the Fast Ethernet models.
Solid Amber LEDPort set to 100 Mb/s on gigabit PoE models, and 100 Mb/s on the Fast Ethernet models.
Flashing Green LEDPort is experiencing a PoE error.
LED OffWhen the Link/Activity LED is green and the Speed LED is off, port set to 10 Mb/s for all gigabit models.
Link / ActivitySolid Green LEDLink established but no data activity exists.
Flashing Green LEDLink established and data activity exists (the blink rate indicates the level of activity).
Flashing Green LEDThe software disabled the port (Slow Flash).
Solid Amber LEDPort not used.
LED OffThe port has no link or activity.

Note: If you link two ports explicitly set for different speeds (for example one configured as 10BaseT and the other as 100BaseTX) the port link LED may indicate a link, but the switch does not establish a link. Always connect ports using the same set speed or use auto-negotiation on each switch.

SFP transceiver Port LED state indicators:

LEDStatusDescription
In UseSolid Green LEDThe SFP port and the transmit port are active.
Flashing Green LEDNot applicable.
Solid Amber LEDSFP Installed—TX Port Inactive
LED OffNo SFP transceiver is present.
Link / ActivitySolid Green LEDThe link is operating normally.
Flashing Green LEDActivity exists on the port (Activity).
Flashing Green LEDSoftware disabled the port (Slow Flash).
LED OffNo link exists.

SFP+ Port LED state indicators:

LEDStatusDescription
TX / RXSolid Green LEDSFP+ detected and link established.
Flashing Green LEDSFP+ established and transmit/receive activity detected.
Solid Amber LEDSFP detected and link established.
Flashing Amber LEDSFP established and transmit/receive activity detected (Flashing).
Flashing Amber LEDTX and RX blink together slowly to indicate a disabled port (Blinking).
LED OffNo SFP or SFP+ connection detected.
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