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Issue with load balancing with 4 ISP

est3ban129

2024-11-21 05:26:16 - last edited 2 weeks ago

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Registered: 2024-02-13

Issue with load balancing with 4 ISP

2024-11-21 05:26:16 - last edited 2 weeks ago

Tags: #Load Balancing

Model: ER8411

Hardware Version: V1

Firmware Version: 1.2.2

Hello everyone,

I have a TP-Link Omada ER8411 configured with 4 fiber optic lines of 1 Gbps connected to the WAN ports. Each line, when tested individually and at different times, reaches around 900 Mbps, which is normal and expected.

However, the problem occurs when I run speed tests simultaneously on all 4 lines. Instead of maintaining close to 1 Gbps per line or summing up the performance, the speed on each line drops to around 400 Mbps. I don't think this should happen.

Here is my current setup:

I am using the 4 x 1 Gbps ports on the router for the WAN connections.
The SFP+ port is used for the LAN connection to my devices using switch SG3452X v1.20 with 10Gb conection

Does anyone know if this is a hardware limitation of the ER8411, or is there a configuration I can adjust to resolve this issue?

I appreciate any suggestions or explanations.

Thanks in advance for your help!

1 Accepted Solution

Clive_A

2 weeks ago - last edited 2 weeks ago

Posts: 5960

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Registered: 2023-06-09

Re:Issue with load balancing with 4 ISP-Solution

2 weeks ago - last edited 2 weeks ago

Hi @est3ban129

Thanks for posting in our business forum.

est3ban129 wrote

@Clive_A

Yes, the problem is that I have never achieved total speeds above 1gbps.

That is, in a test environment, if I do 4 speed tests at the same time with 4 different networked computers, one for each optical fiber, the total of the 4 results will be 900 - 1000mbps but each result will be 250mb, another 300mb, another 200mb.. another 250mb... but it will never reach 1000. 1000. 1000. 1000 at the same time, not even close to those figures.

That is, it is as if there were a CPU limit or a physical limit in the hardware that limits the overall speed to 1000Mbps and i dont know how to fix it.

you can see in the last picture, i cannot disable SFP+ WAN1, in other firmwares i can, but last cannot. and i think i have good configuration.

My hardware is:

ER8411 v1.0

1.2.2

SG3210X-M2 v1.0

1.0.3

SG3452X v1.20

1.20.2

But this is expected.

First, as I said already, it does not add up the speed but split the speed and you did not mention that you tested in this way.

It is still 1 gig of speed if you do the math.

If you want to test this and get 4 computers at 1Gbps at the same time, do PBR for four computers and separate them on each WAN port. ISP A B C and D.

PC1 > A

PC2 > B

PC3 > C

PC4 > D

Do the reading again and this has been explained in the guide. A glance does not make you a careful person. And you need a deep research on load balancing.

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7 Reply

Clive_A

2024-11-22 01:34:03

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Re:Issue with load balancing with 4 ISP

2024-11-22 01:34:03

Hi @est3ban129

Thanks for posting in our business forum.

What do you expect in this case? It's balanced based on your configuration. And in a ratio, zero should not exist.

est3ban129

LV1

2024-11-22 11:25:05

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Re:Issue with load balancing with 4 ISP

2024-11-22 11:25:05

@Clive_A

I have set it to 0 - 1-1-1-1 because the 0 corresponds to the active WAN SFP+ port, which cannot be deactivated (in previous firmware versions, it could be). If it is set to a number greater than 0, load balancing fails since that port has no connection.

The four 1s correspond to the fibers I have connected.

So, with 4 fibers have something to do for get maximum speed at same time ?

Clive_A

3 weeks ago

Posts: 5960

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Registered: 2023-06-09

Re:Issue with load balancing with 4 ISP

3 weeks ago

Hi @est3ban129

Thanks for posting in our business forum.

est3ban129 wrote

@Clive_A

I have set it to 0 - 1-1-1-1 because the 0 corresponds to the active WAN SFP+ port, which cannot be deactivated (in previous firmware versions, it could be). If it is set to a number greater than 0, load balancing fails since that port has no connection.

The four 1s correspond to the fibers I have connected.

So, with 4 fibers have something to do for get maximum speed at same time ?

Load balancing will balance the sessions, that's something you already know.

If you set them to 0:1:1:1:1, then there is a possibility that the server to your PC may be balanced and eventually lead to a problem with the slow test results.

As described in the article, it does not add the speed and if you balance them, it could affect the speed as well.

For a download of a large file, do you experience this slowness?

est3ban129

LV1

3 weeks ago - last edited 3 weeks ago

Posts: 5

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Registered: 2024-02-13

Re:Issue with load balancing with 4 ISP

3 weeks ago - last edited 3 weeks ago

@Clive_A

Yes, the problem is that I have never achieved total speeds above 1gbps.

That is, in a test environment, if I do 4 speed tests at the same time with 4 different networked computers, one for each optical fiber, the total of the 4 results will be 900 - 1000mbps but each result will be 250mb, another 300mb, another 200mb.. another 250mb... but it will never reach 1000. 1000. 1000. 1000 at the same time, not even close to those figures.

That is, it is as if there were a CPU limit or a physical limit in the hardware that limits the overall speed to 1000Mbps and i dont know how to fix it.

you can see in the last picture, i cannot disable SFP+ WAN1, in other firmwares i can, but last cannot. and i think i have good configuration.

My hardware is:

2 weeks ago - last edited 2 weeks ago

Posts: 5960

Helpful: 2928

Solutions: 1364

Stories: 0

Registered: 2023-06-09

Re:Issue with load balancing with 4 ISP-Solution

2 weeks ago - last edited 2 weeks ago

Hi @est3ban129

Thanks for posting in our business forum.

est3ban129 wrote

@Clive_A

Yes, the problem is that I have never achieved total speeds above 1gbps.

That is, in a test environment, if I do 4 speed tests at the same time with 4 different networked computers, one for each optical fiber, the total of the 4 results will be 900 - 1000mbps but each result will be 250mb, another 300mb, another 200mb.. another 250mb... but it will never reach 1000. 1000. 1000. 1000 at the same time, not even close to those figures.

That is, it is as if there were a CPU limit or a physical limit in the hardware that limits the overall speed to 1000Mbps and i dont know how to fix it.

you can see in the last picture, i cannot disable SFP+ WAN1, in other firmwares i can, but last cannot. and i think i have good configuration.

My hardware is:

ER8411 v1.0

1.2.2

SG3210X-M2 v1.0

1.0.3

SG3452X v1.20

1.20.2

But this is expected.

First, as I said already, it does not add up the speed but split the speed and you did not mention that you tested in this way.

It is still 1 gig of speed if you do the math.

If you want to test this and get 4 computers at 1Gbps at the same time, do PBR for four computers and separate them on each WAN port. ISP A B C and D.

PC1 > A

PC2 > B

PC3 > C

PC4 > D

Do the reading again and this has been explained in the guide. A glance does not make you a careful person. And you need a deep research on load balancing.

Recommended Solution

est3ban129

LV1

2 weeks ago

Posts: 5

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Registered: 2024-02-13

Re:Issue with load balancing with 4 ISP

2 weeks ago

@Clive_A This is how I did the test, one computer per WAN, and when I do this the total capacity adds up to 1Gb but no more than this.
That's why I opened the thread here and am asking what could be going on.

This is how I did the test, one computer per WAN, and when I do this the total capacity adds up to 1Gb but no more than this.
That's why I opened the thread here and am asking what could be going on.

In my case, I have 4 VLANs, each VLAN uses one WAN port on the router.

When I do the speed tests always in total the TOTAL traffic adds up to 1GB but separately it never reaches 1GB if the tests are done simultaneously.
If the tests are done separately in time, each WAN correctly reaches 1gb.
When the tests are done together, the total of the 4 WANs does not exceed 1Gb even if the 4 ports are being used independently, the total of the 4 WANs adds up to 1Gb.

Clive_A

2 weeks ago - last edited 2 weeks ago

Posts: 5960

Helpful: 2928

Solutions: 1364

Stories: 0

Registered: 2023-06-09

Re:Issue with load balancing with 4 ISP

2 weeks ago - last edited 2 weeks ago

Hi @est3ban129

Thanks for posting in our business forum.

est3ban129 wrote

@Clive_A This is how I did the test, one computer per WAN, and when I do this the total capacity adds up to 1Gb but no more than this.
That's why I opened the thread here and am asking what could be going on.

This is how I did the test, one computer per WAN, and when I do this the total capacity adds up to 1Gb but no more than this.
That's why I opened the thread here and am asking what could be going on.

In my case, I have 4 VLANs, each VLAN uses one WAN port on the router.

When I do the speed tests always in total the TOTAL traffic adds up to 1GB but separately it never reaches 1GB if the tests are done simultaneously.
If the tests are done separately in time, each WAN correctly reaches 1gb.
When the tests are done together, the total of the 4 WANs does not exceed 1Gb even if the 4 ports are being used independently, the total of the 4 WANs adds up to 1Gb.

Config screenshots for the features we discussed.

Are you available for a remote session?

Also, I assume that your local switches are based on 10Gbps, that's right? They are interlinked as 10G and PCs are on 1Gb. A diagram is also needed.

Issue with load balancing with 4 ISP

Issue with load balancing with 4 ISP

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