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Hierarchy Level


Configure the flow control options for application recovery in case of a prolonged flow control failure.

  • down-on-flow-control—Bring interface down during prolonged flow control.

  • dump-on-flow-control—Cause core dump during prolonged flow control.


    Starting with Junos OS Release 15.1, on MX Series routers with MS-MICs and MS-MPCs, instead of an eJunos kernel core file, the multiservices PIC management daemon (mspmand) core file is generated when a prolonged flow control failure occurs and when you configure the setting to generate a core dump during prolonged flow control (by using the dump-on-flow-control option with the flow-control-options statement). The watchdog functionality continues to generate a kernel core file in such scenarios.

  • reset-on-flow-control—Reset interface during prolonged flow control.


    Starting in Junos OS Release 16.1R7, the reset-on-flow-control option has no effect on the MS-MIC, MS-MPC, MS-DPC, MS-PIC 100, MS-PIC 400, and MS-PIC 500 line cards. This is because starting in Release 16.1R7, Junos OS restarts these line cards to recover them from stuck state due to prolonged flow control.

  • up-on-flow-control—Cause interface to remain in stuck state until you manually restart the PICs.


    Starting in Junos OS Release 16.1R7, if interfaces on an MS-PIC or MS-DPC are in stuck state because of prolonged flow control, Junos OS restarts the service PICs to recover them from this state. However, if you want the PICs to remain in stuck state until you manually restart the PICs, configure the up-on-flow-control option. In releases before Release 16.1R7, there is no action taken to recover service PICs from this state unless one of the options for the flow-control-options statement is configured, or service PIC is manually restarted.

Usage Guidelines

See Configuring Flow Monitoring.

Required Privilege Level

interface—To view this statement in the configuration.

interface-control—To add this statement to the configuration.

Release Information

Statement introduced before Junos OS Release 8.4.