Hey everyone—looking for help diagnosing a persistent bandwidth issue with my home network.
I’m using AT&T Internet Air (5G home internet) with a Ubiquiti UniFi Dream Router (UDR7) as my main router. I also tested a TP-Link router and saw the same issue.
Setup:
AT&T Internet Air (wireless 5G gateway)
Using IP passthrough / bridge-style setup where possible
UniFi Dream Router as main router
Ethernet from AT&T gateway → router WAN
Also tested TP-Link router (same results)
Problem:
I consistently get lower bandwidth when traffic goes through my router, compared to connecting directly to the AT&T Internet Air gateway.
Direct to AT&T gateway: full expected speeds
Through UDR7 or TP-Link: noticeable speed drop / bottleneck
Same issue across multiple routers
What I’ve already tried:
Verified IP passthrough / bridge-style configuration
Rebooted in correct order (gateway → router)
Tested multiple routers (UniFi + TP-Link)
Tried different Ethernet cables
Disabled UniFi features like IDS/IPS and Smart Queues
Question:
Has anyone run into AT&T Internet Air causing throughput drops when using a downstream router, even with passthrough enabled?
Is this likely:
A limitation of AT&T Internet Air gateway (5G routing/NAT)?
Passthrough not truly working like a real bridge?
Or a configuration issue I’m missing?
Any advice or similar experiences would really help.