Switching

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Ask questions and share experiences about EX and QFX portfolios and all switching solutions across your data center, campus, and branch locations.
  • 1.  EX4400 PoE Issues

    Posted 10-20-2022 14:32
    We're running into issues with PoE on newly deployed EX4400s in virtual chassis. The switch seems to lose contact with the PoE controller and some PoE devices lose power while others don't. The output of "show poe interfaces" is inaccurate -- seems to contain stale data.  We have observed the issue across multiple switches in multiple virtual-chassis running JTAC recommended Junos.

    Has anyone else seen this?

    ------------------------------
    DAN BAKER
    ------------------------------


  • 2.  RE: EX4400 PoE Issues

    Posted 10-20-2022 14:46
    Never touched a 4400s..
    Sounds like your running out of power
    run show chassis power-budget-statistics

    If your running redundant disable that..
    deactivate chassis psu redundancy

    If that is not the issue  lets turn up some logging..

    set poe notification-control fpc 0
    set poe notification-control fpc 1
    etc.etc..
    set poe interface all telemetries interval 5
    set poe interface all telemetries duration 24

    set system syslog file poe.log any notice
    set system syslog file poe.log match "(PoE port name|pethPsePortDetectionStatus)"



  • 3.  RE: EX4400 PoE Issues

    Posted 10-21-2022 14:29
    First thing to ask is, what version of JUNOS you running?  
    run show poe controller and that will show you the Max Power Rating for each switch, and the current load being used.

    What do you have connected to the switches, just VoIP phones and AP's?   Depending on the 4400 model, you should have anywhere between a 1400-2200W power budget per switch to work with.  
    VoIP phones usually have a budget of 15.4W  for Class C devices, 30W for Class 4 devices, and our Aruba AP's have a budget of 20.9W.

    When you run the show poe interface, what anomalies are you seeing in the stats?  


    > show poe interface   

    Interface    Admin       Oper    Pair/Mode   Max      Priority    Power          Class

                             status      status          status     power                     consumption   

     ge-0/0/0    Enabled     OFF     2P/AT      15.4W      Low            0.0W           not-applicable

     ge-0/0/1    Enabled     OFF     2P/AT      15.4W      Low            0.0W           not-applicable

     ge-0/0/2    Enabled     OFF     2P/AT      15.4W      Low            0.0W           not-applicable

     ge-0/0/3    Enabled     OFF     2P/AT      15.4W      Low            0.0W           not-applicable

     ge-0/0/4    Enabled     OFF     2P/AT      15.4W      Low            0.0W           not-applicable

     ge-0/0/5    Enabled      ON     2P/AT      15.4W      Low            4.0W            3

     ge-0/0/6    Enabled      ON     2P/AT      15.4W      Low            5.0W            3

     ge-0/0/7    Enabled     OFF     2P/AT      15.4W      Low            0.0W           not-applicable

     ge-0/0/8    Enabled     OFF     2P/AT      15.4W      Low            0.0W           not-applicable

     ge-0/0/9    Enabled      ON     2P/AT      30.0W      Low            4.5W            4

    ge-0/0/10    Enabled      ON     2P/AT      30.0W      Low            2.0W            4

    ge-0/0/11    Enabled     OFF     2P/AT      15.4W      Low            0.0W           not-applicable