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Enabling Dedicated and Real-Time BFD

To enable dedicated BFD on the SRX100, SRX110, SRX210, SRX220, SRX240, SRX300, SRX320,, SRX340, SRX345, SRX550, SRX550M, SRX650, and SRX1500 devices:

  1. Include the dedicated-ukern-cpu statement at the [edit chassis] hierarchy level and then commit the configuration.

    1. [edit]

    2. user@host# set chassis dedicated-ukern-cpu

      user@host# commit

      The following warning message to reboot the system displays when you commit the configuration:

      warning: Packet processing throughput may be impacted in dedicated-ukernel-cpu mode. warning: A reboot is required for dedicated-ukernel-cpu mode to be enabled. Please use "request system reboot" to reboot the system. commit complete

  2. Reboot the device to enable the configuration:

    1. user@host> request system reboot

  3. Verify that dedicated BFD is enabled.

    user@host> show chassis dedicated-ukern-cpu

    Dedicated Ukern CPU Status: Enabled

To enable real-time BFD on the SRX100, SRX110, SRX210, SRX220, SRX240, SRX300, SRX320, SRX340, SRX345, SRX550, SRX550M, and SRX650 devices:

  1. Include the realtime-ukern-thread statement at the [edit chassis] hierarchy level and then commit the configuration.

    1. [edit]

    2. user@host# set chassis realtime-ukern-thread

      user@host# commit

      The following warning message to reboot the system displays when you commit the configuration:

      WARNING: realtime-ukern-thread is enable. Please use the command request system reboot.

  2. Reboot the device to enable the configuration:

    1. user@host> request system reboot

  3. Verify that real-time BFD is enabled.

    user@host> show chassis realtime-ukern-thread

    realtime Ukern thread Status: Enabled

Note:

When BFD is used over the following types of interfaces: tunnel interfaces, redundant interfaces, aggregate interfaces, IRB interfaces, it will revert back to centralized mode for packet processing

Note:

Starting with Junos OS Release 15.1X49-D100, SRX340, SRX345, and SRX1500 devices support dedicated BFD.

Note:

Starting with Junos OS Release 15.1X49-D100, SRX300 and SRX320 devices support real-time BFD.

Note:

Starting with Junos OS Release 15.1X49-D110, SRX550M devices support distributed BFD.

Note:

Starting with Junos OS Release 12.3X48-D60, dedicated BFD is supported on SRX240, SRX550, and SRX650 devices.

Note:

Starting with Junos OS Release 12.3X48-D60, real-time BFD is supported on SRX100, SRX110, SRX210, and SRX220 devices.

Note:

SRX Series devices support the following maximum number of BFD sessions:

  • Up to four sessions on SRX100, SRX110, SRX210, SRX220, SRX300, and SRX320 devices

  • Up to 50 sessions on SRX240, SRX340, SRX345, SRX550, SRX550M, and SRX650 devices

  • Up to 120 sessions on SRX1500 devices

  • The supported failure detection interval has improved