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  • 1.  BFD over BGP flaps from time to time with reason:Detect Timer Expiry

    Posted 04-19-2023 09:42

    Hi,

    BFD over BGP has the following issue.  BFD flap from time to time , while bgp session is restored and also bfd session.
    Do you know what to check? switch qfx5120.   spine-leaf topology

    logs:
    DAEMON-4-BFDD_STATE_UP_TO_DOWN: BFD Session 172.31.101.4 (IFL 0) state Up -> Down LD/RD(16/23) Up time:7w0d 17:02 Local diag: CtlExpire Remote diag: None Reason: Detect Timer Expiry.



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    CRISTIAN CHIRATCU
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  • 2.  RE: BFD over BGP flaps from time to time with reason:Detect Timer Expiry

    Posted 04-19-2023 09:58

    Pls add BFD timers in the Thread.
    Overly or underlay BGP/BFD problem?




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    Kalle Andersson
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    Original Message


  • 3.  RE: BFD over BGP flaps from time to time with reason:Detect Timer Expiry

    Posted 04-19-2023 10:03

    Also Junos OS Release



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    Kalle Andersson
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    Original Message


  • 4.  RE: BFD over BGP flaps from time to time with reason:Detect Timer Expiry

    Posted 04-19-2023 14:32
     
    --- JUNOS 20.4R3.8 Kernel 64-bit  JNPR-11.0-20210618.f43645e_buil

    Overlay

    set protocols bgp group overlay bfd-liveness-detection minimum-interval 300
    set protocols bgp group overlay bfd-liveness-detection multiplier 3



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    CRISTIAN CHIRATCU
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    Original Message


  • 5.  RE: BFD over BGP flaps from time to time with reason:Detect Timer Expiry

    Posted 04-19-2023 14:32
    Edited by CRISTIAN CHIRATCU 04-19-2023 14:32

    Hi,

     

     

    --- JUNOS 20.4R3.8 Kernel 64-bit  JNPR-11.0-20210618.f43645e_buil

     

    Overlay

    set protocols bgp group overlay bfd-liveness-detection minimum-interval 300

    set protocols bgp group overlay bfd-liveness-detection multiplier 3

     




    Original Message


  • 6.  RE: BFD over BGP flaps from time to time with reason:Detect Timer Expiry

    Posted 04-19-2023 10:39

    This will generally indicate some kind of link or interface problem between the two devices.  Here is the Juniper article of all the items to check.

    https://supportportal.juniper.net/s/article/M-MX-T-Troubleshooting-Checklist-BFD?language=en_US#BFD_flap



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    Steve Puluka BSEET - Juniper Ambassador
    IP Architect - DQE Communications Pittsburgh, PA (Metro Ethernet & ISP - Retired)
    http://puluka.com/home
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    Original Message


  • 7.  RE: BFD over BGP flaps from time to time with reason:Detect Timer Expiry

    Posted 04-19-2023 14:35

    Thank you.

     

    I will check .

    CEC Juniper Community

     

    Kind Regards,

     

     

     




    Original Message


  • 8.  RE: BFD over BGP flaps from time to time with reason:Detect Timer Expiry

    Posted 05-07-2024 01:01

    fixed by upgrading JUNOS OS.



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    CRISTIAN CHIRATCU
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    Original Message