Outstanding Issues with the MX480 Router
This topic lists outstanding hardware issues with the MX480 3D Universal Edge router. For information about software issues, see the Junos OS Release Notes.
- In Junos OS Release 10.0R2, if a third AC supply is inserted in an empty slot (even though the power supply is turned off and the AC cord is not plugged in), the operational power supplies’ output voltage reading in the Junos OS can show an inaccurate number (60-61V instead of 57V) under some conditions, such as when the load is nearly 100% and the operating temperature exceeds 40C.
- There is an input mode switch on each MX480 DC high capacity
power supply, covered by a small plate. The input mode switch tells
the system what capacity feed is connected (60A or 70A), which in
turn 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
70A feeds or 60A feed with minimum voltage range 42V and up. The default
setting is 1
In Junos OS Releases 10.0R3, 10.1R2, and 10.2R1, the MX480 DC high capacity power supply input mode switch is not operating as expected, though this has no effect on the power supply operations, it will generate alarms incorrectly. [PR532230]
- 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.
- Juniper Networks strongly recommends that you install Junos OS Release 8.4R2 or later before deploying the MX480 router into service.
- The XFP cages and optics on the MX480 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 MX480 router. Mixing of AC supplies and DC supplies may damage your chassis. [PR/233340]
