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Gigabit Connection severely hampered by UTM's IPS.

Brendan Corcoran

We recently got Verizon FIOS gigabit in our area, so we decided to make the jump. We had 150/150 previously with no throughput problems whatsoever.

Since upgrading to gigabit, however, speeds through the UTM with IPS enabled are capping out at 240Mbit up/down. That is absolute best case.

I have read the article about the way that IPS can have limitations with speed tests (i.e. the connection speed exceeds the speed at which the cpu can process the IPS). I tried disabling the IPS and immediately we tripled our throughput. So, I believe it is in fact a CPU limiting issue.

That said, if I were to upgrade the hardware on this home-built UTM, what kind of increases am I looking to gain? Right now it is running an AMD Phenom II X6 1100T (3.3GHz, 3.7GHz turbo). I know this is not the fastest cpu relative to the CPU's that are out now. That said, if I were to upgrade to an i5-7600k or i7-7700k, would we see (with IPS enabled) similar throughput to the current CPU with IPS disabled? Even approx double would be acceptable, but the more the merrier.

Overspec'd hardware is not a concern. What is a concern is that we attain the higher throughput as desired.



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  • +1

    Well, we upgraded the hardware to the i7-7700k and some DDR4-2133 memory. The speeds with IPS more than doubled. We're getting approx 500-550Mbps per connection with IPS enabled.

    C-states are disabled in the bios, so the CPU won't automatically scale back from 4.2GHz. It will range between 4.2-4.5GHz if turbo is ever triggered.

    Essentially, the steps were to:

    • Back up configuration in 9.4
    • Reinstall with 9.5 (to make sure there weren't any incorrect drivers being loaded since we switched from AMD to Intel)
    • Do initial setup
    • Restore configuration
    • Fix eth0 because it wasn't detected properly (most likely due to the card position on motherboard)

    All in all it took about 4-5 hours, so not bad.

    For now, we're happy with the jump in performance.

Reply
  • +1

    Well, we upgraded the hardware to the i7-7700k and some DDR4-2133 memory. The speeds with IPS more than doubled. We're getting approx 500-550Mbps per connection with IPS enabled.

    C-states are disabled in the bios, so the CPU won't automatically scale back from 4.2GHz. It will range between 4.2-4.5GHz if turbo is ever triggered.

    Essentially, the steps were to:

    • Back up configuration in 9.4
    • Reinstall with 9.5 (to make sure there weren't any incorrect drivers being loaded since we switched from AMD to Intel)
    • Do initial setup
    • Restore configuration
    • Fix eth0 because it wasn't detected properly (most likely due to the card position on motherboard)

    All in all it took about 4-5 hours, so not bad.

    For now, we're happy with the jump in performance.

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