Help us improve your experience.

Let us know what you think.

Do you have time for a two-minute survey?


Maintaining the T4000 SCGs



For optimum router performance, verify the condition of the SCGs.


On a regular basis:

  • Check the SCG LEDs. During normal operations:

    • The green OK LED on the SCG faceplate is lit.

    • The yellow FAIL LED on the SCG faceplate is not lit. If the yellow FAIL LED is lit, see Troubleshooting the T4000 SCGs.

  • Use the show chassis environment scg command to verify the status of the SCGs.