Switch T2600G-28SQ firmware Downgrade

This thread has been locked for further replies. You can start a new thread to share your ideas or ask questions.

Switch T2600G-28SQ firmware Downgrade

This thread has been locked for further replies. You can start a new thread to share your ideas or ask questions.
Switch T2600G-28SQ firmware Downgrade
Switch T2600G-28SQ firmware Downgrade
2021-07-25 13:35:26 - last edited 2021-07-25 13:41:27
Hardware Version: V1
Firmware Version: 1.0.5 Build 20200304 Rel.61626(s)

Hello, 

 

"Did not found the correct model in the select box"...

 

I bought another switch T2600G-28SQ, which came with the new firmware 2020, but this version dont recognize my SFPs and the ports cant come up.

 

My other T2600G-28SQ is using the previous version of 2019, which works perfectly with same SFPs...

 

Searching in forum I see a post from 2016 without solution:

https://community.tp-link.com/en/business/forum/topic/86991

 

Is there a way to downgrade the firmware?

 

I tried by telnet using tftp and by web without success...

 

by telnet:

 It will only upgrade the backup image. Continue? (Y/N):y
 Loading tpImage...
 Loading success
 Start to upgrade firmware. Please wait......
Failed to upgrade the firmware. Please try again.

 

and in web, the same error.

 

Can someone help me here?

 

 

  0      
  0      
#1
Options
3 Reply
Re:Switch T2600G-28SQ firmware Downgrade
2021-07-26 08:58:00

@Diorges 

Maybe this is the reason why the new firmware cannot downgrade back to the old firmware.

 

If the SFP module cannot work with the 2020 firmware's T2600G-28SQ, can you share the information about the SFP module? You can try to change the port speed(compatible with module) and Duplex(Auto or Full) on the SFP port.

  0  
  0  
#2
Options
Re:Switch T2600G-28SQ firmware Downgrade
2021-07-26 16:00:44

@John1234 

 

Hello, thank you for your response!

 

The problem occurs only with SFP+ ports, the 1GE Sfp ports works normally, I forget to mention this!

 

In telnet I see the switch recognize the SFP+ module, but the port just dont go up, and in the other side (HUAWEI S6730) I see the RX signal.

 

The SFP modules are:

WDM13-R40 and WDM12-R40
http://www.flytec.com.py/produto/5208/F.%20M%20SFP+%2010G%2040KM%20LC%20BIDI%20TX1330-RX1270NM%20WDM13-R40

 

 

  0  
  0  
#3
Options
Re:Switch T2600G-28SQ firmware Downgrade
2021-08-03 07:09:31

@Diorges 

 

This looks like a compatibility issue after the update. Like John mentioned you can try to manually fix that, will that work? If not, you should wait for TP reply. Maybe downgrade or next update to fix it.frown

  0  
  0  
#4
Options

Information

Helpful: 0

Views: 653

Replies: 3

Related Articles