Rogers Technicolor CGM4140COM in bridge mode
Ubiquiti EdgeRouter Lite (ERL-3) router behind it
Kanata (Ottawa), ON
1 gigabit/30 megabit package + Ignite TV channels
946 down/31 up, no issues
Once every 1 to 1.5 weeks the speed doesn't exceed (any speedtest, consistently) 650-680 megabit down.
Complete power off to both cable modem and router for 5 min - no impact, still (!) 650-680 megabit down when all powered up and running.
Router restart - no impact.
Cable modem restart - no impact.
Troubleshooting (the weird part):
Change the cable modem from bridge to gateway mode (90 sec).
Restart the cable modem (3-4 min).
Change the cable modem back from gateway to bridge mode (90 sec).
Speed test - back to 946/31:-).
The best uneducated explanation I can think of is the cable modem "syncs up" with Rogers' servers at a lower speed for some reason, the power off/on doesn't change that synced up speed, but this bridge-->gateway-->restart-->bridge sequence somehow forces to re-negotiate the speed back to the maximum 946 down.
No idea what to do about it, and even if anything can be done about it...
Thanks, interesting, I will try, but what is inexplicable to me is why a complete power off of both devices doesn't change anything....but this weird sequence on the cable modem does...
I have no idea what's going on here or what could be causing the slowdown. All speed tests have been performed through the Ubiquiti router. Since power-cycling the XB6 does not fix the problem, it may or may not be at fault. That's why I thought it would be interesting to perform a direct speed test while the XB6 is in a possibly bad state.
Another thing that happens (from the router's perspective) when changing the XB6 from gateway to bridge mode is that the addressing on the WAN interface changes from 10.0.0.0/24 to a public IP address. I don't see why that should change anything on either the XB6 or the router... unless the router has QoS enabled and/or is doing some rate limiting in which case, changing the IP addressing on the interface may cause it to reset its local state.
The thing is I was getting gigabit speeds with CODA Modem. I have hardware offloading enabled and QoS disable (Ubiquiti Features) and the max speed I get is 600 Mbps when bridging the technicolor modem.
Can anyone from Rogers speak on this?
We're able to replicate this in the lab with a direct connection in bridge mode after a reboot and have escalated to the vendor. We haven't received any updates yet but we can share as they become available.