Sunday, October 04, 2020

Re: Understanding download speed reduction by introducing an inline Ubiquity ERL device

Hello,

Scott Seekamp <sseekamp@risei.net>:
> I had a similar speed drop on an Edge Router 4. I don?t know if it?s the same situation on the Lite, but I believe it?s expected due to hardware acceleration support (or lack of) and single core performance on the pf side.

The last time I logged on an ubiquiti switch (not a router) on SSH, I
was wondering why there was no bridge/switch interface showing up on
the interface list.

It looks like there is an userland process controlling the switching,
probably communicating to a dedicated chip, maybe a dedicated ASIC.

As far as I remember, an strace on it did show some ioctl() to some
custom /dev/... device.

So it looks like a comparison between hardware accelerated routing vs
in-kernel routing off the CPU.

--
Josuah

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