Troubleshooting LAN Speed Issue with Grandstream GWN70XX Router

Troubleshooting LAN Speed Issue with Grandstream GWN70XX Router

Description

This article describes the troubleshooting steps and debug logs required when facing low-speed issues with Grandstream GWN70XX series routers’ LAN ports.

Troubleshooting

1.Set up a simple network topology, and connect the PC’s LAN to one of the router’s LAN ports.

[Broadband modem] = [Router] = [PC]

2.Determine the negotiated rate and Link Speed of the PC Wired NIC in Windows:

Open Windows PowerShell > run command Get-NetAdapter | select interfaceDescription, name, status, linkSpeed

Windows Network Interface LinkSpeed with PowerShell Commands
Figure 1: Windows Network Interface Link Speed or Negotiated Rate with PowerShell Commands
Windows Ethernet Status showing Link Speed
Figure 2: Ethernet Status showing Link Speed in Windows

3. Determine the WAN-type configurations in the GWN70XX router. Toggle each option to see if it helps

4. Capture and download Syslog at DEBUG level under System Settings > System Diagnosis > External Syslog

5. Export a copy of the router’s backup file under System Settings > Backup & Restore

6. Provide the network diagram of the sites.

7. Upload items from 4 to 6 to the Helpdesk ticket