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PPPOE does not work on TPLINK but works on ASUS

PPPOE does not work on TPLINK but works on ASUS

PPPOE does not work on TPLINK but works on ASUS
PPPOE does not work on TPLINK but works on ASUS
Saturday - last edited Saturday
Tags: #Network Connectivity
Model: Archer AX3000  
Hardware Version: V1
Firmware Version: 1.5.10

Hello, 

I have a very strange problem. Sometime ago my there was a huge outage of ISP due to cabling owner company issue. Since that time, my connection is generally ok, but sometmes, during router reboot it have problems with connetiong with ppoe. 

 

As I get from the ISP - they are not using vlans (it is termineted on ONT). I have correct ppoe user/pass. ISP is not filtering WAN port MAC. Still there is an issue. I tried different modes from tplink (ie AX53) but simply it not working. After c/a 24h it starts workin again. resseting and disconnecting cables do not help. 

 

In logs there are:

2026-04-04 17:14:39 PPP INFO [7402] pppoe send PADR Host-Uniq(1cea)

2026-04-04 17:14:39 PPP INFO [7402] pppoe receive PADO form AC-MAC(04:f4:1c:16:89:b3)

2026-04-04 17:14:39 PPP INFO [7402] pppoe receive PADO AC-Name(MikroTik)

2026-04-04 17:14:39 PPP INFO [7402] pppoe send PADI Host-Uniq(1cea)

 

I googled that PADS message is missing.

 

 

now the clue: 

I get from ISP taht ASUS routers do not face this issue. I checked that and simply providin pppoe user/pass make internet back again. 

Connecting tplink - not working. 

Connecting asus - working

conecting tplink  - not wokring. 

 

After few hours (<24) tplink will be working again. 

 

@TPlink can you explain this? I've been using tplink since for ever, but this is very disapining. 

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#1
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9 Reply
Re:PPPOE does not work on TPLINK but works on ASUS
Saturday

  @5h4dow 

 

Common troubleshooting steps (if connection fails)
If this log entry is associated with internet disconnection, check the following:
  • MTU Size: Set the Maximum Transmit Unit (MTU) to 1492, which is standard for PPPoE.
  • Check Physical Connection: Ensure the WAN port is properly connected to the ONT

You may try using a different ethernet cable between ONT and the router - the one from the router kit should be fine

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Re:PPPOE does not work on TPLINK but works on ASUS
Saturday

  @terziyski 

 

Hello,

Thanks for the reply but IMHO it is not good direction. 
 

I have the same mtu (1492) on TP-Link and Asus devices. I am using the same cable on both devices - connecting cable to Asus works, connecting the very same cable to TP-Link doesn't work. 
 

Additionally I checked many different cables, still the same. 
 

please note that after some time the same cable starts working on TP-Link as well. 
 

all in all TP-Link "sometimes" cause outage but it is not the case on asus. 
 

I can provide any other logs or test anything.

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#3
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Re:PPPOE does not work on TPLINK but works on ASUS
Saturday

  @5h4dow 

 

To potentially exclude a FW issue, what is your exact router model, HW version and FW region, refer its bottom sticker:

 

​​

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#4
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Re:PPPOE does not work on TPLINK but works on ASUS
Saturday

  @terziyski 

I dont know why but the sticker is quite unreadable. 
 

i thought that it would be permanently printed under the sticker and I removed it (I think I shouldn't do that crying)

 

 

please note that it has the newest available firmware installed. 
 

Is this info available somewhere after logging to web management console? 

 

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#5
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Re:PPPOE does not work on TPLINK but works on ASUS
Saturday - last edited Saturday

  @5h4dow 

 

The serial number and FW region can be seen only on the router bottom sticker, Store this picture somewhere safe, in case this information is needed in the future.

 

Disable IPv6 on the AX55 and test again if there's any improvement:

 

 

Here is some feedback regarding the latest AX 55 FW v1.5.10.

If nothing helps so far, contact your local support for further assistance.

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Re:PPPOE does not work on TPLINK but works on ASUS
Saturday

  @terziyski 

ipv6 was disabled. 

 

please note that I patched ax55 to 1.5.10 today as I thought that it would help somehow. It was behaving the same on previous version (not sure which was is it)
 

I am facing the same issue on ax53 1.0.5 (patched today as well) and on previous version as well it had the same issue. Router will somehow login via pppoe automagically over the night. Still works as a charm on Asus. 
 

IMHO something is wrong with pppoe implementation on TP-Link. I was able to login to pppoe with my Linux pc and on Asus.

 

 

unfortunatelly I will have access to this location only during Easter, contacting local support on Tuesday might not help :(

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Re:PPPOE does not work on TPLINK but works on ASUS
Saturday

  @5h4dow 

 

Sorry to hear that, but if it is, as you stated a " wrong pppoe implementation ", that means a FW issue, which has to be addresses by the TP-Link development team.

So, your best bet would be Monday, which is a standard business day in China.

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#8
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Re:PPPOE does not work on TPLINK but works on ASUS
Monday - last edited Monday

  @5h4dow 

 

Hi I'm almost certain you have a Vlan ID problem, your ISP is probably using Vlan ID 0 and no TPL routers can be configured to use 0, what you can do is contact your ISP support and ask them to turn off the Vlan ID at their end, as you say Asus etc no problem it just self configures, the TPL one will as well as long as the ISP has unblocked the Vlan ID, if they won't try setting Vlan ID to 101.

 

They may say they aren't using Vlans but I bet you they are and don't want it getting out which one so they can continue to pump out cheap out of date units to their customers and have a backdoor into you disguised as help & updates.

 

Also try setting the router up in dynamic mode.

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#9
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Re:PPPOE does not work on TPLINK but works on ASUS
Tuesday

  @Bogle 

thank you for your reply.

 

As far as I know, vlan is terminated on ONT and from it, I get untagged vlan via RJ45 cable. Moreover I do not have to set any vlan settings on Asus or Linux and it simply works (I only have to provide user/pass)
 

 

additionally, if there would be vlan issue, it would not work at all. Please note that TP-Link starts working with pppoe after ca 24h. This is not the case on asus. 


this is very strange behavior, but Asus seems to manage it somehow. 

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#10
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