[j-nsp] P2MP traffic loss over QFX and EX series

[Tom Beecher]

This PR may be worth asking about.

https://prsearch.juniper.net/problemreport/PR1693424


On Sat, Sep 2, 2023 at 7:08 PM Gonzalo Caceres via juniper-nsp <
juniper-nsp at puck.nether.net> wrote:

> 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 QFX5110/5120) it is
> lost. We use these switches as multilayer, they have MPLS suite protocols
> (ISIS, LDP and RSVP).
>
>
>
> *>show versionModel: ex4600-40fJunos: 21.4R3.15 (recommended version at
> day)*
>
> The switch see the transit LSP from IP 2.2.2.2 to 1.1.1.1:
>
>
>
>
> *> show mpls lspTransit LSP: 2 sessionsTo      From    State Rt Style
> Labelin Labelout LSPname2.2.2.2 1.1.1.1 Up    0  1     SE 6    2
>  lsp1Total 2 displayed, Up 2, Down 0*
>
> Traffic from 1.1.1.1 come's via ae0:
>
>
> *> show route 1.1.1.11.1.1.1/32 <http://1.1.1.1/32> *[IS-IS/18] via
> ae0.01.1.1.1/32 <http://1.1.1.1/32> *[LDP/9] via ae0.0, Push 315471*
>
>   Traffic to 2.2.2.2 goes via ae3:
>
>
> *> show route 2.2.2.22.2.2.2/32 <http://2.2.2.2/32> *[IS-IS/18] 20:36:26,
> via ae3.02.2.2.2/32 <http://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 UpInput 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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