The article describes of a scenario where MX960 may be misidentified as M40, the cause and the fix for the same.

show version output on older versions of Junos like for instance 11.x for with an SCB like SCB2E that is not supported by the JunOS version can show the device information as M40.

SCB type not recognized by that version of code, if the SCB type is not supported by the JunOS code we may see the model as m40 under the output of "show version" as below.

Here the RE-type is RE-S-2000 and the SCB is SCB2E which is supported from JunOS versions 13.3R1 and later versions. If the JunOS is lesser than the supported version, the system may erroneously display the Model as M40 instead of an MX960.

root> show version

Model: m40 <---------------

JUNOS Base OS boot [11.4R7.5]

JUNOS Base OS Software Suite [11.4R7.5]

root> show chassis routing-engine

Routing Engine status:

   Temperature                34 degrees C / 93 degrees F

   CPU temperature            47 degrees C / 116 degrees F

   DRAM                     3584 MB <----------------------

   Memory utilization         11 percent

   CPU utilization:

     User                      0 percent

     Background                0 percent

     Kernel                    0 percent

     Interrupt                 0 percent

     Idle                    100 percent

   Model                         RE-S-2000 <----------------------

   Serial ID                     9012022118

   Start time                    2013-05-10 00:09:29 UTC

   Uptime                        6 minutes, 58 seconds

   Last reboot reason            0x1:power cycle/failure

   Load averages:                1 minute  5 minute 15 minute

                                      0.00      0.09      0.07

To fix this, perform a USB media install to a supported JunOS version.

Note: Since the SCB type is not rightly recognized, file transfer options from other RE won't go through.