Slow WAN Troughput after TWC Upgrade

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Slow WAN Troughput after TWC Upgrade

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Cirroc

2015-05-07 10:11:54 - last edited 2021-08-21 04:51:25

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Slow WAN Troughput after TWC Upgrade

2015-05-07 10:11:54 - last edited 2021-08-21 04:51:25

Region : UnitedStates

Model : TL-ER5120

Hardware Version : V1

Firmware Version : 1.0.6 Build 20130716 Rel.45532

ISP : TWC

I have an ER5120 running the latest firmware. Until recently I was using a first generation Docsis 3 Modem (SB6121). With that, I was regularly getting my max speeds from TWC (50/5). Two weeks ago, I upgraded my modem to a 6183 and my plan to 200/20. With that, I'm able to get the full 20 Mbps upstream but cannot get above about 25 Mbps down. I know that it's not a wiring problem because I can get the full 200 if I connect directly to the modem. Stranger still, the speed is even slower if I turn "flow control" OFF. With it OFF I get only about 10 Mbps down (still the full 20 up, though). So, I figure something is screwed up. I have bandwidth control turned off.

Any thought?

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Tony Seaford

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2015-05-07 13:53:20 - last edited 2021-08-21 04:51:25

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Re:Slow WAN Troughput after TWC Upgrade

2015-05-07 13:53:20 - last edited 2021-08-21 04:51:25

How did you test the speed?
Can you reset ER5120 to factory defaults and reconfigure it to work with your new modem?
Later, connect just one computer to ER5120 and test the speed again.

Cirroc

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2015-05-08 03:34:08 - last edited 2021-08-21 04:51:25

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2015-05-08 03:34:08 - last edited 2021-08-21 04:51:25

Tony Seaford wrote

How did you test the speed?
Can you reset ER5120 to factory defaults and reconfigure it to work with your new modem?
Later, connect just one computer to ER5120 and test the speed again.

I tested the speed with both TWC's speed test and with SpeedTest.Net. I confirmed the speeds by monitoring it through the ER5120's built-in monitor.

I have tried resetting once without any change, but I may try it again. I'm hesitant because I'll have recreate a bunch of rules.

Before I do that, I'm very curious to confirm whether the v1 hardware can really achieve the reported 345 mpbs throughput.

UPDATE: After some more fooling around, I'm getting 200+ mbps down. I had made some changes yesterday but was testing the speed at my main computer (which is connected to the router through several switches). When I checked again directly at the router, I was at full speed. I think the key was actually getting TWC to reset the modem and check the provisioning.

I'm so happy. I've always loved this router because it's so darn stable.

Slow WAN Troughput after TWC Upgrade

Slow WAN Troughput after TWC Upgrade

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