Junos OS

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  • 1.  RT_FLOW - FLOW_REASSEMBLE_FAIL

    Posted 10-14-2022 10:19

    Hello

    What is the reason syslog is logging alot of messages like
    <14>1 2022-10-14T14:41:01.772+03:00 Srx RT_FLOW - FLOW_REASSEMBLE_FAIL [junos@2636.1.1.1.2.136 source-address="RemoteRouter" destination-address="LocalRouter" assembly-id="20887"]

    Remote / Local Router are ip addresses for ipsec tunnel. Also noticing high cpu usage.

    Under security flow tcp-mss ipsec-vpn mss i have tryed to set 1350-1450 mtu. No change.



  • 2.  RE: RT_FLOW - FLOW_REASSEMBLE_FAIL

     
    Posted 10-19-2022 01:36
    Hello,

    The packets would be fragmented in the path and there could be delay in reaching the firewall. 
    All the fragmented packets which are received are stored in FCB. I would suggest you to test the network on what is the MTU along the path. 

    Regards