Dear TP-Link

I am experiencing significant network instability and "sticky client" behavior with my Deco XE75 Pro setup using an ethernet backhaul through a TP-Link TL-SG108 unmanaged switch. Although the Deco app confirms a "Strong" ethernet connection, devices on the Guest Network (VLAN 591) frequently lose internet access and fail to connect or to roam effectively between units. My diagnostic ping tests from a smartphone on the satellite Deco unit to the main Deco unit reveal severe jitter, with latency spikes jumping inconsistently between 4ms and 66ms, despite 0% packet loss. This suggests the unmanaged switch is struggling to efficiently process the 802.1Q VLAN tags and IEEE 1905.1 management traffic, leading to buffer delays that diminishes roaming performance and cause speed drops when multiple devices are active. I am planning to replace the TL-SG108 with a 2.5G managed switch like the Ubiquiti USW-Flex-2.5G to ensure full VLAN transparency and utilize the 2.5Gbps backhaul capacity. Can you confirm if this switch-induced jitter is a known limitation for Deco backhaul environments and if a managed switch is the recommended solution?

Kind Regards

Meridius