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P2MP traffic loss over QFX and EX series

  • 1.  P2MP traffic loss over QFX and EX series

    Posted 08-26-2023 11:50

    Hi everyone,

    I have multicast traffic through a P2MP LSP and when this traffic goes through an EX or QFX series switch (spot EX4600 and QFX5110) it is lost. I use the switches as multilayer switch, they have MPLS suite protocols (ISIS, LDP and RSVP).

    >show version
    Model: ex4600-40f
    Junos: 21.4R3.15 (recommended version at day)

    > show mpls lsp
    Ingress LSP: 0 sessions
    Total 0 displayed, Up 0, Down 0
    
    Egress LSP: 0 sessions
    Total 0 displayed, Up 0, Down 0
    
    Transit LSP: 2 sessions
    To      From    State Rt Style Labelin Labelout LSPname
    2.2.2.2 1.1.1.1 Up    0  1     SE 6    2        lsp1
    2.2.2.2 1.1.1.1 Up    0  1     SE      63       lsp2
    Total 2 displayed, Up 2, Down 0

    > show route 1.1.1.1 inet.0: + = Active Route, - = Last Active, * = Both 1.1.1.1/32 *[IS-IS/18] via ae0.0 inet.3: + = Active Route, - = Last Active, * = Both 1.1.1.1/32 *[LDP/9] via ae0.0, Push 315471

    > show route 2.2.2.2
    
    inet.0:
    + = Active Route, - = Last Active, * = Both
    
    2.2.2.2/32 *[IS-IS/18] 20:36:26, via ae3.0
    
    inet.3:
    + = Active Route, - = Last Active, * = Both
    
    2.2.2.2/32 *[LDP/9] 20:36:25, via ae3.0

    The P2MP traffic see on input interface but they not replicate at the output:

    Interface: ae0, Enabled, Link is Up
    Input bytes: 7282719382422 (785608168 bps) [207824323]
    Input packets: 5263502719 (70972 pps) [223103]
    Interface: ae3, Enabled, Link is Up
      Output bytes: 186620844 (26760 bps) [7545]
      Output packets: 1225967 (13 pps) [47]

    Has anyone ever had a similar problem? or are you certain that this type of LSP will NOT work on these switches?

    Thanks, Gonzalo.



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    GONZALO CACERES
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