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  • 1.  MX204 and RE-S-1600X8 available memory

    This message was posted by a user wishing to remain anonymous
    Posted 06-22-2022 11:38
    This message was posted by a user wishing to remain anonymous

    Hello,
    I have a MX204 with RE-S-1600X8 and I am a bit puzzled. The RE shows in the boot process as available memory only 16GB, although 32GB are installed.
    real memory = 17179869184 (16384 MB)
    avail memory = 16569049088 (15801 MB)
    Can someone explain this to me?
    Thanks a lot!


  • 2.  RE: MX204 and RE-S-1600X8 available memory

    Posted 06-23-2022 11:35
    The MX204 comes with 32GB in its RE.

    On this architecture, the RE runs a customised Linux, which starts a Virtual Machine with FreeBSD running JunOS. This VM receives 16GB of memory.
    When you connect to the RE, you're inside the JunOS VM with 16GB.

    If you need it, you can increase the memory size allocated to the VM to 24 GB (over 32), feature available from JunOS 21.2.


    ------------------------------
    Olivier Benghozi
    ------------------------------



  • 3.  RE: MX204 and RE-S-1600X8 available memory

    Posted 06-24-2022 10:20
    Hello Olivier,

    thank you for your Message.
    Can you give me the command(s) to increase the memory for the VM?


    ------------------------------
    LOTHAR ZEISE
    ------------------------------



  • 4.  RE: MX204 and RE-S-1600X8 available memory

    Posted 06-25-2022 09:53
    Nope, don't know it unfortunately :/

    ------------------------------
    Olivier Benghozi
    ------------------------------



  • 5.  RE: MX204 and RE-S-1600X8 available memory

    Posted 06-25-2022 11:15

    This is set vm to high memory

    request vmhost exec "set_vjunos_memory high" 

    this is reset VM machine memory to default.  16G

    request vmhost exec "set_vjunos_memory default" 

    You might need to reboot your router.



    ------------------------------
    JNCIE-SP, JNCIE-DC,JNCIE-ENT
    ------------------------------



  • 6.  RE: MX204 and RE-S-1600X8 available memory

    Posted 06-28-2022 09:56
    As I could not find them in the docs, do we know what the implications of these commands are?

    ------------------------------
    Koen De Wit
    ------------------------------



  • 7.  RE: MX204 and RE-S-1600X8 available memory

    Posted 06-28-2022 20:50
    of course, it's not public. You can open a technical ticket or ask the juniper partner open a technical ticket for more detail