[j-nsp] How to understand DRAM field in "show chassis routing-engine" output?

[Martin T]

Hi,

on some Juniper platforms there is a separate value for DRAM size and
installed memory size in "show chassis routing-engine" output. For
example "show chassis routing-engine" output in M10i and MX960
routers:

root at M10i> show chassis routing-engine | match "DRAM"
    DRAM                      1536 MB (1536 MB installed)

root at M10i>

..or:

{master}
root at MX960> show chassis routing-engine | match "DRAM"
    DRAM                      3584 MB (4096 MB installed)
    DRAM                      3584 MB (3584 MB installed)

{master}
root at MX960>


Am I correct that DRAM size is the amount of memory which Junos is
able to allocate and installed memory size is the amount of physical
memory installed? If yes, then are there any other causes other than
32bit Junos when not all the installed memory can't be allocated?


thanks,
Martin