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Can't LAG 2x TL-SG108PE and 1x TL-SG108E

Can't LAG 2x TL-SG108PE and 1x TL-SG108E

Can't LAG 2x TL-SG108PE and 1x TL-SG108E
Can't LAG 2x TL-SG108PE and 1x TL-SG108E
2024-06-16 22:09:37 - last edited 2024-06-20 00:42:33
Tags: #Configuration #LAG
Model: TL-SG108PE  
Hardware Version: V5
Firmware Version: 1.0.0 Build 20230218 Rel.51358

I am trying to LAG 3 switches together. The setup I have is one switch:

 

A. TL-SG108PE 5.0 Firmware (1.0.0 Build 20220531 Rel.35386) downstairs with LAG2 on ports 5 and 7 going upstairs to switch:

 

B. TL-SG108PE 5.0 Firmware (1.0.0 Build 20230218 Rel.51358) also on ports 5 and 7. This LAG works fine I have no issues. I am also trying to LAG this 2nd switch to another switch in the next room that has a log of devices. The 3rd switch is:

 

C. TL-SG108E 6.0 Firmware (1.0.0 Build 20230218 Rel.50633) LAG1 Ports 3 and 4.

 

The issue I am having is if I have all 4 cables for the 2 LAGs connected to switch B, then switch B and switch C stop working. Switch A downstairs works fine. As soon as I unplug one of the ethernet cables from switch B, everything works fine. If I disconnect everything and connect cables from B to C first, that LAG works fine. But then when I connect cables from A to B, switch B and C stop working again.

 

I went in and reset all 3 switches, added the LAGs first and then redid all my VLANs and I'm still getting the same issue. Any ideas on how to fix this issue?

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#1
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1 Accepted Solution
Re:Can't LAG 2x TL-SG108PE and 1x TL-SG108E-Solution
2024-06-18 02:07:24 - last edited 2024-06-20 00:42:33

Hi @vonwerderc 

Turn off the loop detection. Let me know if this fixes it.

Best Regards! If you are new to the forum, please read: Howto - A Guide to Use Forum Effectively. Read Before You Post. Look for a model? Search your model NOW Official and Beta firmware. NEW features! Subscribe for the latest update! ☛Download Beta Here☚ ☛ ★ Configuration Guide ★ ☚ ☛ ★ Knowledge Base ★ ☚ ☛ ★ Troubleshooting ★ ☚ ● Be kind and nice. ● Stay on the topic. ● Post details. ● Search first. ● Please don't take it for granted. ● No email confidentiality should be violated. ● S/N, MAC, and your true public IP should be mosaiced.
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#5
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5 Reply
Re:Can't LAG 2x TL-SG108PE and 1x TL-SG108E
2024-06-17 03:12:33

Hi @vonwerderc 

Thanks for posting in our business forum.

Post the config for all three here.

Best Regards! If you are new to the forum, please read: Howto - A Guide to Use Forum Effectively. Read Before You Post. Look for a model? Search your model NOW Official and Beta firmware. NEW features! Subscribe for the latest update! ☛Download Beta Here☚ ☛ ★ Configuration Guide ★ ☚ ☛ ★ Knowledge Base ★ ☚ ☛ ★ Troubleshooting ★ ☚ ● Be kind and nice. ● Stay on the topic. ● Post details. ● Search first. ● Please don't take it for granted. ● No email confidentiality should be violated. ● S/N, MAC, and your true public IP should be mosaiced.
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#2
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Re:Can't LAG 2x TL-SG108PE and 1x TL-SG108E
2024-06-17 09:55:54

  @Clive_A 

Attached zip with snips of each switch config and the actual .cfg file. For these snips, the 2nd cable connecting switch B and C is disconnected, because it won't work if both of them are connected.

 

Let me know if you need any additional information.

 

File:
switch_.zipDownload
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#3
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Re:Can't LAG 2x TL-SG108PE and 1x TL-SG108E
2024-06-18 01:40:30

Hi @vonwerderc 

Thanks for posting in our business forum.

vonwerderc wrote

  @Clive_A 

Attached zip with snips of each switch config and the actual .cfg file. For these snips, the 2nd cable connecting switch B and C is disconnected, because it won't work if both of them are connected.

 

Let me know if you need any additional information.

 

Without VLANs, after your reset, set up the LAG, will it work? It could be a problem with the software. I will also check with the dev.

Best Regards! If you are new to the forum, please read: Howto - A Guide to Use Forum Effectively. Read Before You Post. Look for a model? Search your model NOW Official and Beta firmware. NEW features! Subscribe for the latest update! ☛Download Beta Here☚ ☛ ★ Configuration Guide ★ ☚ ☛ ★ Knowledge Base ★ ☚ ☛ ★ Troubleshooting ★ ☚ ● Be kind and nice. ● Stay on the topic. ● Post details. ● Search first. ● Please don't take it for granted. ● No email confidentiality should be violated. ● S/N, MAC, and your true public IP should be mosaiced.
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#4
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Re:Can't LAG 2x TL-SG108PE and 1x TL-SG108E-Solution
2024-06-18 02:07:24 - last edited 2024-06-20 00:42:33

Hi @vonwerderc 

Turn off the loop detection. Let me know if this fixes it.

Best Regards! If you are new to the forum, please read: Howto - A Guide to Use Forum Effectively. Read Before You Post. Look for a model? Search your model NOW Official and Beta firmware. NEW features! Subscribe for the latest update! ☛Download Beta Here☚ ☛ ★ Configuration Guide ★ ☚ ☛ ★ Knowledge Base ★ ☚ ☛ ★ Troubleshooting ★ ☚ ● Be kind and nice. ● Stay on the topic. ● Post details. ● Search first. ● Please don't take it for granted. ● No email confidentiality should be violated. ● S/N, MAC, and your true public IP should be mosaiced.
Recommended Solution
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#5
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Re:Can't LAG 2x TL-SG108PE and 1x TL-SG108E
2024-06-19 13:55:00

  @Clive_A That worked! For some reason I wasn't getting email notifications, so it took me longer to see this. Thank you! I appreciate you looking into this so quickly.

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#6
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