Outstanding Issues with the MX240 Router

This topic lists outstanding hardware issues with the MX240 3D Universal Edge router. For information about software issues, see the Junos OS Release Notes.

• On the MX240 DC high capacity power supplies, the input mode switch tells the system what capacity feed is connected (60A or 70A). This is used for power inventory management. When the input mode switch is set to '0' (zero): expect 60A feeds, with a voltage range of -39V to -72VDC. When the input mode switch is set to '1' (one), expect either a 70A feed or a 60A feed with minimum voltage of 42V and up. The default setting of the input mode is 1 (e.g. 60A with voltages above 42VDC, or 70A).

  Known bug: In Junos OS Releases 10.0R3, 10.1R2, and 10.2R1, the MX240 DC high capacity power supply input mode switch status is not properly reflected in the power inventory management, generating alarms incorrectly. This does not have any effect on the operation of the supply. [PR532230]

  Important notes:

  • All supplies should have the same feed setting.
  • Correct usage of the feed setting is required for all supplies in order to get the desired power inventory management.

  The XFP cages and optics on the MX240 router are industry standard parts that have limited tactile feedback for insertion of optics and fiber. You need to insert the optics and fiber firmly until the latch is securely in place. [PR/98055]

• Do not mix AC and DC power supplies on an MX240 router. Mixing of AC supplies and DC supplies may damage your chassis. [PR/233340]