Junos OS

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  • 1.  MX480 + MS-DPC

    Posted 12-13-2022 06:32
    Hello All!
    I encountered such a problem when using MX480 as the main gateway for the network. This message appears many time in logs after all bgp sessions is up:
    Dec 13 02:45:03 gw-re0 fpc1 RT: Failed prefix add IPv4 - x.x.x.x (No memory) on FE 0

    > start shell pfe network fpc1
    SDPC platform (1200Mhz MPC 8548 processor, 1024MB memory, 512KB flash)
    SDPC1(gw-re0 vty)#  show jtree 0 memory
    Jtree memory segment 0 (Context: 0x4354f978)
    -------------------------------------------
    Memory Statistics:
    16777216 bytes total
    16710712 bytes used
    60328 bytes available (12800 bytes from free pages)
    3528 bytes wasted
    2648 bytes unusable
    32768 pages total
    32520 pages used (2571 pages used in page alloc)
    223 pages partially used
    25 pages free (max contiguous = 8)

    Jtree memory segment 1 (Context: 0x435d15b8)
    -------------------------------------------
    Memory Statistics:
    16777216 bytes total
    4608240 bytes used
    12165936 bytes available (12164096 bytes from free pages)
    3008 bytes wasted
    32 bytes unusable
    32768 pages total
    9005 pages used (9003 pages used in page alloc)
    5 pages partially used
    23758 pages free (max contiguous = 23758)

    Googling found a recommendation:
    set chassis memory-enhanced route
    but in my MX480 i see "Warning: configuration block ignored: unsupported platform (mx480)". a few questions about this:
    1) set chassis route-memory-enhanced - is this the same command?
    2) does this apply to all MS-DPC at once?
    3) can i upgrade MS-DPC memory physically, as example - replace RAM with large capacity, or replace MS-DPC entirely?
    4) if replace MS-DPC - then which card?
    ​p.s. in fpc3 another card is installed - the situation is similar there...