LAN ports on mesh not working after guest wifi

[the_birdy]

Hi,

RT-BE92U main router (3.0.0.6.102_37504-g4be1e5e_1088-g416ff_BB0B, latest)

RT-AXE7800 mesh node over Ethernet (3.0.0.4.388_25142-g8c68976, latest)

tri-band wifi on both. When guest wifi is enabled, lose connectivity on mesh router Eth ports. IP assigned but can't ping any internal IP. Wifi including guest one continues to work like charm on both main and mesh.

Any ideas ?

[jzchen]

Is Ethernet Backhaul Mode enabled?  If not try with it enabled and report back....

[the_birdy]

It sure is. 

[MarkWood21]

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@the_birdy Check Lesco Bill wrote:

Hi,

RT-BE92U main router (3.0.0.6.102_37504-g4be1e5e_1088-g416ff_BB0B, latest)

RT-AXE7800 mesh node over Ethernet (3.0.0.4.388_25142-g8c68976, latest)

tri-band wifi on both. When guest wifi is enabled, lose connectivity on mesh router Eth ports. IP assigned but can't ping any internal IP. Wifi including guest one continues to work like charm on both main and mesh.

Any ideas ?

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The issue might be caused by guest network isolation, preventing Ethernet access. Check if guest isolation is enabled and disable it. Ensure DHCP is only handled by the main router, and set the mesh node to Access Point mode. Consider updating or downgrading firmware and rebooting devices to resolve conflicts.

[the_birdy]

Thanks. 

Limited guest NW to main router and mesh LAN ports started to function as expected. Need to try with downgrading but culprit seems to be guest wifi.