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    CRS328-4C-20S-4S+RM Smart Switch, 20 x SFP cages, 4 x SFP+ cages, 4 x Combo ports (Gigabit Ethernet or SFP), 800MHz CPU, 512MB RAM, 1U rackmount case, Dual Power Supplies, RouterOS L5 or SwitchOS (Dual Boot)

    The CRS328-4C-20S-4S+RM is a 28 independent port switch with a combo group. This device has twenty SFP ports, four SFP+ ports for 10G modules and four combo ports, where you can choose to use SFP or RJ45 ports from the combo group. These ports can also be software selected, so if you have plugged in all eight cables, you can use scripting, to decide which four combo ports will be active.

    The device comes in a 1U rackmount case with two 100-240 V power supplies with failover functionality. A RJ45 console port is available for management and debugging, and a mode button can be customised to execute any RouterOS commands.

    The device has a “Dual boot” feature that allows you to choose between two operating systems - RouterOS or SwOS.

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    Specifications

    Details
    Product code CRS328-4C-20S-4S+RM
    Architecture ARM 32bit
    CPU 98DX3236
    CPU core count 1
    CPU nominal frequency 800 MHz
    Dimensions 443 x 200 x 44 mm
    License level 5
    Operating System RouterOS / SwitchOS
    Size of RAM 512 MB
    Storage size 16 MB
    Storage type FLASH
    Tested ambient temperature -20 + 60 degrees C
    Suggested price $369.00

    Powering

    Details
    Max Power consumption 43W
    Number of AC inputs 2
    AC input range 100-240

    Ethernet

    Details
    Ethernet Combo ports 4

    Fiber

    Details
    SFP ports 20
    SFP+ ports 4

    Peripherals

    Details
    Serial port RJ45

    Other

    Details
    PCB temperature monitor Yes
    Voltage Monitor Yes

    Included parts

    Quick GuideOpen
    BrochureOpen
    RouterOS current releaseDownload
    RouterOS software manualOpen

    High resolution images

    Switching results

    CRS328-4C-20S-4S+RM
    Mode Configuration 64 byte 512 byte 1518 byte
    kpps Mbps kpps Mbps kpps Mbps
    Switching Non blocking Layer 2 throughput 95,238.1 48,761.9 15,037.6 61,594.0 5,201.6 63,167.8
    Switching Non blocking Layer 2 capacity 95,238.1 97,523.8 15,037.6 123,188.0 5,201.6 126,335.5
    Switching Non blocking Layer 1 throughput 95,238.1 64,000.0 15,037.6 64,000.0 5,201.6 64,000.0
    Switching Non blocking Layer 1 capacity 95,238.1 128,000.0 15,037.6 128,000.0 5,201.6 128,000.0

    Ethernet test results

    CRS328-4C-20S-4S+RM98DX3236A1 all port test
    ModeConfiguration1518 byte512 byte64 byte
    kppsMbpskppsMbpskppsMbps
    Bridgingnone (fast path)81.3987.3235962.6296151.6
    Bridging25 bridge filter rules81.3987.390.7371.590.946.5
    Routingnone (fast path)81.3987.3235962.6261.9134.1
    Routing25 simple queues81.3987.3112.6461.2111.557.1
    Routing25 ip filter rules59.8726.261.4251.559.530.5
    1. All tests are done with Xena Networks specialized test equipment (XenaBay),and done according to RFC2544 (Xena2544)
    2. Max throughput is determined with 30+ second attempts with 0,1% packet loss tolerance in 64, 512, 1518 byte packet sizes
    3. Values in Italic indicate that max throughput was reached without maxing out CPU, but because board interface configuration was maxed out
    4. Test results show device maximum performance, and are reached using mentioned hardware and software configuration, different configurations most likely will result in lower results

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