Tplink 5120 V1. Slow download speeds with 1 and 2 lines connected

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Tplink 5120 V1. Slow download speeds with 1 and 2 lines connected

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Tplink 5120 V1. Slow download speeds with 1 and 2 lines connected
Tplink 5120 V1. Slow download speeds with 1 and 2 lines connected
2020-04-29 16:53:18 - last edited 2021-04-19 11:16:10
Model: TL-ER5120  
Hardware Version: V1
Firmware Version: 130716

I have the ER5120 with 2 VDSL 50mbit lines connected. The last few days I had speed issues which I though were due increased traffic. Today I costacted support of bith ISPs because I had download speeds of max 5mbit.

Both lines handshake at 37-41Mbit. When I removed the cables from the modems and stopped using bridge mode both lines had an increase of download speed to 33-37Mbit.

All these seem to be a problem with the ER5120. How can I troubleshoot this issue?

I restarted ER5120 mutiple times with no change. CPU ultilisation was about 20%

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Re:Tplink 5120 V1. Slow download speeds with 1 and 2 lines connected
2020-04-30 08:30:39 - last edited 2021-04-19 11:16:10

@NikosK 

 

Maybe you can try to use Iperf to confirm the NAT throughput of your router.

https://www.tp-link.com/en/support/faq/2408/

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