GL-A1300 (Slate Plus) PPPoE Connection Failure

[okman]

Problem Description

My new GL-A1300 router is unable to establish an internet connection. The system log consistently shows that the PPPoE discovery process fails with the error: Timeout waiting for PADO packets .

This issue is specific to the GL-A1300. I have an older GL-XE300 router that connects to the exact same internet line, using the exact same cables and PPPoE settings (username, password, VLAN 200), and it works perfectly.

Environment:

ISP Connection Type: PPPoE
Required VLAN ID: 200
ONT: Genexis Fibertwist P2411

Key Finding & Analysis

The critical difference between the two routers is the WAN port link speed:

• The GL-A1300 (failing) negotiates a 1Gbps link, but the PPPoE handshake never completes.
• The GL-XE300 (working) negotiates a 100Mbps link, and the PPPoE connection is established successfully.

This strongly suggests there is a hardware-level incompatibility or a firmware/driver bug on the GL-A1300 that prevents it from correctly handling PPPoE discovery packets over a tagged VLAN when the link speed is 1Gbps.

Troubleshooting Steps Performed

I have performed extensive troubleshooting to isolate the issue:

1. Updated Firmware: The GL-A1300 is running the latest stable firmware.
2. Factory Reset: I have performed multiple factory resets and configured the connection from scratch each time.
3. MAC Cloning: I have cloned the MAC address from the working GL-XE300 onto the GL-A1300. The issue persists.
4. Intermediate Switch: I placed a simple unmanaged gigabit switch between my ISP's modem and the GL-A1300's WAN port. This did not solve the problem.
5. Forcing Link Speed: I attempted to manually force the WAN port (eth1 ) to 100Mbps using the ethtool command via SSH. However, the router's network management daemon (netifd ) overrides this setting on every connection attempt, forcing the link back to 1Gbps.

Conclusion

The problem is isolated to the GL-A1300 router. All evidence points to a bug in the firmware or network driver that affects PPPoE negotiation on a tagged VLAN at 1Gbps speeds.

Could you please investigate this issue?

[alen5193]

Hi,
Can you turn on the router, reconnect to the PPPOE line, wait for a while, export the router log and PM it to me?