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  • 1.  MX204 flowspec route issue (RPD process reset)

    Posted 03-17-2023 00:34

    Hi all,

    When we use exabgp to announce Flowspec route to MX204 via inetflow.0, the RPD will be reset randomly. It will happen sometimes, the FS route will be working normal after RDP reset.

    Exabgp announce route

    destination 100.100.100.1/32; community 65001:10000; redirect 65001:9991;

    RPD reset message (randomly)

    Mar 17 11:51:22  WAN01 rpd[24601]: JTASK_ASSERT: Assertion failed rpd[24601]: file "../../../../../../../../src/junos/usr.sbin/rpd/lib/krt/common/krt_flow.c", line 6910: "transient_rt && transient_com != old_rt_com && transient_ac != old_ac"
    Mar 17 11:51:23  WAN01 rpd[24601]: JTASK_ABORT: abort rpd[24601] version 20.4R2-S1.6 built by builder on 2021-06-22 21:59:57 UTC: Invalid argument

    Here is normal situtation:

    > show route receive-protocol bgp 100.100.100.1 table inetflow.0 extensive 

    inetflow.0: 1 destinations, 5 routes (1 active, 0 holddown, 0 hidden)
    Limit/Threshold: 10000/7500 destinations
    * 100.100.100.1,*/term:1 (5 entries, 1 announced)
         Accepted
         BMP: Pre: advertise Station: xxxxxx
         Flags: NoNexthop
         Localpref: 100
         AS path: I  (Originator)
         Cluster list:  10.1.1.1
         Originator ID: 10.2.2.1
         Communities: 65001:10000 redirect:65001:9991

    > show firewall filter __flowspec_default_inet__ 

    Filter: __flowspec_default_inet__                              
    Counters:
    Name                                                Bytes              Packets
    100.100.100.1*                               7551919523             12893828



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    Benjamin CL
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  • 2.  RE: MX204 flowspec route issue (RPD process reset)

    Posted 03-17-2023 10:54

    Hi,

    What does your BGP config look like on the MX? Do you have multipath enabled for any neighbors?

    I had a similar problem; I have multipath enabled on the neighbors and was running in to PR1642741. While not related to flowspec specifically I could reproduce the problem by announcing a flowspec route.



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    C F
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  • 3.  RE: MX204 flowspec route issue (RPD process reset)

     
    Posted 03-18-2023 02:41

    Hi,

    Regards

    Ulf




  • 4.  RE: MX204 flowspec route issue (RPD process reset)

    Posted 03-19-2023 22:25

    Hi Ulf,

    Here is the version:

    Model: mx204
    Junos: 20.4R2-S1.6

    Thanks for your information.



    ------------------------------
    Benjamin CL
    ------------------------------