ER605 Appears to Throttle Network Speed
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We're experiencing an issue with our ER605 Omada Gigabit Multi-WAN VPN Router. To be sure, this is a residential location and not a business location. Maybe that's the first problem. :p What seems to be happening is our broadband network speed will start out at the expected 200Mb/s for our service, but after a day of operations this is reduced to ~90Mb/s, so less than half.
After a reboot, it goes back up to the expected 200Mb/s.
Note that when I logged in this afternoon, the CPU usage was much higher than it was after the reboot. All 4 cores (if I understand correctly) were in the 20-60% utilization. After a reboot, they are nominal as expected:
I should have gotten a "before" shot before rebooting it, but assumed that was its normal operating posture. I will get a screenshot for the next time we notice degradation.
In any case, it would be nice to track this down. Thank you for any assistance you can provide.
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To add to my grief, I was wrong about the distance between the routers, doubling the distance. 🤦♂️ It was actually a 25ft cable and I needed a 30ft cable to make it one connection. Let's just say these past two weeks have not been my finest.
I put this in Sunday and it has been doing well.
https://smile.amazon.com/dp/B076FM63HH
So much so that I am prepared to brag about success (AGAIN!) here and see if it can endure such accolades.
See you in another day when the connection inexplicably fails again, or never as this time it actually worked. One of the two. 🤷♂️
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@TPLDem Well it's been less than an hour and it's already throttled. The CPU looks nominal, however, so there appear to be 2 problems here. :P
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Plz help. :P
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Alright so after some digging it appears that the port in question has its speed go from `1000M` to `100M`. No reboot is necessary. Simply disconnecting it and reconnecting it resets it to 1000M. However over time it appears to downgrade to 100M.
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If it automatically changes from 1000M to 100M, it may be a faulty cable that had to handshake lower due to errors/noise. I would suggest trying different cables for that port to confirm.
The CPU usage you are seeing may be normal if you have IP statistics enabled. Check and turn that off if you want really low idle cpu usage in general.
There could be actual hardware or software issues but these are some things to eliminate first.
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Thank you for the reply @dsj. I am not so sure on the cable, but one thing I noticed is that the router it went to (also a TPLink router) had an older firmware version. So I applied that and we'll see how it does. After a reboot it went back up to 1000M on the ER605.
Note that I have never seen it degrade and then improve. It has always degraded and stayed there. However, if it does persist after this firmware/reboot I will look into the cables.
As for the IP Statistics, are you able to point me in the direction of this? I, unfortunately, do not see this in the ER605 Menu (still finding my way around). Note that I did not install/configure anything with this router with the exception of the firmware.
Thank you for any continued assistance you can provide.
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Dang you might be right after all @dsj ... still drops even after latest firmware and reboot. I have a 50ft wire between the two wires plus a 4ft + coupler between the two. Just switched out the wire but wondering if the coupler might be a problem.
What's strange here is that the speed is great after first plugging in and is that way for some time after it. It's about an hour or so after the cable is connected that it goes down. Additionally, it just takes a reconnect to also make it snap back up. It would seem that if it were a cable issue that the connection would be spotty even after reconnecting.
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Hm bummer, I've replaced cords and couplers and the problem still persists. The uplink reports 1000M on plugin and after a while it degrades to 100M.
I can also verify that plugging this same coupled cable directly into the cable modem results in consistent 1000M connectivity.
So the problem does appear to be w/ this router unit.
Any additional suggestions would be appreciated.
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I can confirm that after a day of being plugged in directly to the cable modem that 1000M is maintained without degradation or issue.
Is there a setting on the ER605 that I should further look into?
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Since you're on latest firmware, you could change the port config to 1000M instead of leaving it on auto as an attempt to have it stick.
You might want to look up specs for the coupler or try to eliminate it. Most of them tend to be pretty low spec/quality.
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