ExtremeSwitching (EXOS)

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Why are green LEDs blinking on ports that are not UTP connected?

  • 1.  Why are green LEDs blinking on ports that are not UTP connected?

    Posted 05-23-2017 22:31
    UTP is not connected but the green LED is blinking on the port.
    Disabling a port will also mark the link status as active.
    I have treated the equipment three times with the same symptoms, but I get the same symptoms.
    I wonder how these symptoms come out and how to solve them.

    In the picture below, ports 21 and 24 are not connected to the utp but a green LED
    Coming in. If you disable port 21, the link is enabled as shown below.



    Image : ExtremeXOS version 15.6.3.1 v1563b1-patch1-5 by release-manager
    on Sun Aug 16 21:34:14 EDT 2015
    BootROM : 2.0.2.3
    Diagnostics : 6.3

    Service First Recorded
    Field Replaceable Units Days Start Date
    ---------------------------------------------------------------
    Switch : X460-48p 22 Apr-27-2017

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

    in # sh por configuration no-refresh
    Port Configuration
    Port Virtual Port Link Auto Speed Duplex Flow Load Media
    router State State Neg Cfg Actual Cfg Actual Cntrl Master Pri Red
    ================================================================================
    1 VR-Default E R ON AUTO AUTO UTP
    2 VR-Default E R ON AUTO AUTO UTP
    3 VR-Default E R ON AUTO AUTO UTP
    4 VR-Default E R ON AUTO AUTO UTP
    5 VR-Default E R ON AUTO AUTO UTP
    6 VR-Default E A ON AUTO 10 AUTO FULL NONE UTP
    7 VR-Default E A ON AUTO 1000 AUTO FULL SY/ASY UTP
    8 VR-Default E R ON AUTO AUTO UTP
    9 VR-Default E R ON AUTO AUTO UTP
    10 VR-Default E A ON AUTO 1000 AUTO FULL SY/ASY UTP
    11 VR-Default E R ON AUTO AUTO UTP
    12 VR-Default E R ON AUTO AUTO UTP
    13 VR-Default E R ON AUTO AUTO UTP
    14 VR-Default E R ON AUTO AUTO UTP
    15 VR-Default E A ON AUTO 1000 AUTO FULL SY/ASY UTP
    16 VR-Default E R ON AUTO AUTO UTP
    17 VR-Default E A ON AUTO 10 AUTO FULL NONE UTP
    18 VR-Default E R ON AUTO AUTO UTP
    19 VR-Default E R ON AUTO AUTO UTP
    20 VR-Default E R ON AUTO AUTO UTP
    21 VR-Default D A ON AUTO 1000 AUTO FULL SY/ASY UTP
    22 VR-Default E R ON AUTO AUTO UTP
    23 VR-Default E R ON AUTO AUTO UTP
    24 VR-Default E A ON AUTO 1000 AUTO FULL SY/ASY UTP
    25 VR-Default E R ON AUTO AUTO UTP
    26 VR-Default E A ON AUTO 1000 AUTO FULL NONE UTP
    27 VR-Default E A ON AUTO 1000 AUTO FULL SYM UTP
    28 VR-Default E R ON AUTO AUTO UTP
    29 VR-Default E A ON AUTO 1000 AUTO FULL SY/ASY UTP
    30 VR-Default E R ON AUTO AUTO UTP
    31 VR-Default E A ON AUTO 1000 AUTO FULL SY/ASY UTP
    32 VR-Default E A ON AUTO 1000 AUTO FULL SY/ASY UTP
    33 VR-Default E R ON AUTO AUTO UTP
    34 VR-Default E R ON AUTO AUTO UTP
    35 VR-Default E R ON AUTO AUTO UTP
    36 VR-Default E R ON AUTO AUTO UTP
    37 VR-Default E R ON AUTO AUTO UTP
    38 VR-Default E R ON AUTO AUTO UTP
    39 VR-Default E R ON AUTO AUTO UTP
    40 VR-Default E R ON AUTO AUTO UTP
    41 VR-Default E R ON AUTO AUTO UTP
    42 VR-Default E R ON AUTO AUTO UTP
    43 VR-Default E R ON AUTO AUTO UTP
    44 VR-Default E R ON AUTO AUTO UTP
    45 VR-Default E R ON AUTO AUTO UTP
    46 VR-Default E R ON AUTO AUTO UTP
    47 VR-Default E R ON AUTO AUTO UTP
    48 VR-Default E A ON AUTO 100 AUTO FULL SY/ASY UTP
    49 VR-Default E R ON AUTO AUTO NONE
    50 VR-Default E R ON AUTO AUTO NONE
    51 VR-Default E A ON AUTO 1000 AUTO FULL SYM 51 SX
    52 VR-Default E A ON AUTO 1000 AUTO FULL SYM 51 SX
    53 VR-Default E NP OFF 10000 FULL NONE
    54 VR-Default E NP OFF 10000 FULL NONE
    55 VR-Default E NP OFF 10000 FULL NONE
    56 VR-Default E NP OFF 10000 FULL NONE
    57 VR-Default E NP OFF 10000 FULL NONE
    58 VR-Default E NP OFF 10000 FULL NONE
    ================================================================================



  • 2.  RE: Why are green LEDs blinking on ports that are not UTP connected?

    Posted 05-25-2017 14:39
    Jeon, there were a few issues in the past in which X460 ports would go into a shutdown state, though the port would display Active and the LED would be green.

    Looking into this there were two possible causes along with next actions:

    1. Hardware - Please run extended diagnostics on the switch and verify whether any of the tests come back as failed. Also confirm whether the symptoms return after the reboot.

    2. Software - As mentioned above, there was a rare issue with the PHY in which the state would not change. This was resolved in EXOS 16.1. It would be recommended to upgrade to v16.2.2.4-patch1-3 and monitor the ports to see whether the issue returns.

    Let us know if there are any questions.