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    ssb slot-number (always | preferred);

    Hierarchy Level

    [edit chassis redundancy]

    Release Information

    Statement introduced before Junos OS Release 7.4.


    On M20 routers, configure which System and Switch Board (SSB) is the master and which is the backup.


    By default, the SSB in slot 0 is the master and the SSB in slot 1 is the backup.


    slot-number—Specify which slot is the master and which is the backup.

    always—Define this SSB as the sole device.

    preferred—Define this SSB as the preferred device of at least two.

    Required Privilege Level

    interface—To view this statement in the configuration.

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

    Modified: 2013-03-19