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  • 1.  Juniper EX4100 PIC2 1G or 10G

    Posted 08-01-2023 14:28

    hi,

    I'm working on a Juniper EX4100 and I've managed to get them both stacked using 10G-SR SFPs in PIC1.

    However, I now need a 1G-SX uplink within PIC2, for some reason this is up up, but I do not get link from the upstream device (QFX5100). Replacing this with a 10G-SR SFP both ends however works. I feel its fair to conclude that 1G-SX SFP in a Juniper EX4100 PIC2 is my issue here - has anyone else had this? The hardware suggests this is supported, but am I missing configuration?



    FPC 0            REV 08   650-134056   FA0823AN0176      EX4100-48P-CHAS
      CPU                     BUILTIN      BUILTIN           FPC CPU
      PIC 0          REV 08   BUILTIN      BUILTIN           48x10M/100M/1G Base-T
      PIC 1          REV 08   650-134056   FA0823AN0176      4x1G/10G/25G SFP/SFP+/SFP28
        Xcvr 2       REV 01   740-021308   C2305126935       SFP+-10G-SR
        Xcvr 3       REV 01   740-021308   C2305126931       SFP+-10G-SR
      PIC 2          REV 08   650-134056   FA0823AN0176      4x1G/10G SFP/SFP+
        Xcvr 0       REV 01   740-011613   F2033908882       SFP-SX
        Xcvr 1       REV 01   740-011613   F2033908809       SFP-SX
        Xcvr 2       REV 01   740-011613   F2033298563       SFP-SX
        Xcvr 3       REV 01   740-011613   F2033908803       SFP-SX

    EX4100-48P> show interfaces ge-0/2/0 terse
    Interface               Admin Link Proto    Local                 Remote
    ge-0/2/0                up    up
    ge-0/2/0.0              up    up   eth-switch

    EX4100-48P> show interfaces diagnostics optics ge-0/2/0 | match pow
        Laser output power                        :  0.2890 mW / -5.39 dBm
        Laser receiver power                      :  0.2170 mW / -6.64 dBm

    EX4100-48P> show chassis fpc pic-status
    Slot 0   Online       EX4100-48P-CHAS
      PIC 0  Online       48x10M/100M/1G Base-T
      PIC 1  Online       4x1G/10G/25G SFP/SFP+/SFP28
      PIC 2  Online       4x1G/10G SFP/SFP+
    Slot 1   Online       EX4100-48P-CHAS
      PIC 0  Online       48x10M/100M/1G Base-T
      PIC 1  Online       4x1G/10G/25G SFP/SFP+/SFP28
      PIC 2  Online       4x1G/10G SFP/SFP+

    QFX5100> show interfaces ge-0/0/12 terse 
    Interface               Admin Link Proto    Local                 Remote
    ge-0/0/12               up    down
    ge-0/0/12.0             up    down eth-switch

    QFX5100> show interfaces diagnostics optics ge-0/0/12 | match pow 
        Laser output power                        :  0.2930 mW / -5.33 dBm
        Laser receiver power                      :  0.2276 mW / -6.43 dBm



    ------------------------------
    Liam
    ------------------------------


  • 2.  RE: Juniper EX4100 PIC2 1G or 10G

    Posted 08-02-2023 03:58

    Not sure if the  QFX5100 is the same but on the ex4650 you have to tell it ports are 1g and it works in block of 4

    XXXXXX@XXXXXX# show chassis 

    fpc 0 {
        pic 0 {
            port 40 {
                speed 1G;
            }
        }
    }

    for ports 40-43 

    let me know how youo get on. 
    Have you tried the same 1g gig optics in each end ?

    Regards

    Simon



    ------------------------------
    Simon Bingham
    ------------------------------

    Original Message


  • 3.  RE: Juniper EX4100 PIC2 1G or 10G

    Posted 08-02-2023 04:42

    hi Simon,

    Thank you for your thoughts.

    We did try the same 1G optics each end, did a whole matrix and swapped around.

    We even tried the set chassis command you've listed above, however the speed option is only 10G, 1G is not available - saying this now perhaps its hidden and I could have tried.

    I decided to go through the open problems on the JunOS version we chose to run, 22.4R1, and low and behold I found this:
    https://prsearch.juniper.net/problemreport/PR1657766

    https://www.juniper.net/documentation/us/en/software/junos/release-notes/22.4/junos-release-notes-22.4r1/topics/open-issues/ex-open-issues-22.4r1.html

    So the fix on this version is to disable auto-neg on the upstream QFX interface.

    I'm going to try a later version but I cannot see this PR as resolved in 23.2R1 so the workaround may still apply.



    ------------------------------
    Liam
    ------------------------------

    Original Message


  • 4.  RE: Juniper EX4100 PIC2 1G or 10G

    Posted 08-03-2023 10:33

    hi Simon,

    We upgraded the software and the bug still exists.


    Therefore for anyone reading 23.2R1 still does not solve this and no-auto-neg must be set up the upstream device.



    ------------------------------
    Liam
    ------------------------------

    Original Message