Sorry, Clog the pipe = fill the link with traffic.
It's true it will not take long if the link is running at say 40Mb/s but if it running at say 2Mb/s (which it does when its "ill") it will take 20x longer and the "pipe" will be "clogged" for much longer.
Ideally I would download a small amount, say 100k and measure that.
If the speed is slow I can take action in my watchdog.
I'm also concerned that filling the pipe will increase ping times and the watchdog my trigger wrongly.
Background:
I was running on B3 15MHz, SINR +10db and getting 20-40Mb/s for about 6 days with no breaks :)
Then over a period of about 24 hours SINR went gradually to -10b. Speed dropped to about 2Mb/s (which is slower than my backup link).
I suspect the CA took over (B20 5MHz).
Ping was still fine so my watchdog did not realize the link was rubbish.
So I thought I could add to the watchdog:
If (SINR < 2 && MB/s < 4) {
Turn off LTE for 1 hour (My load balancer will then switch in ADSL)
}
Hence the need to measure speed.
