The AT&T Fiber handoff
AT&T's gateway stays in the path (IP passthrough to your router). Check the gateway's available Ethernet speeds — older units top out below newer 2 and 5 Gbps tiers.
Match the plan first
1 Gbps fiber: 2.5GbE WAN gives headroom; the fiber consistency matters more than router class.
2 Gbps fiber: needs faster-than-2.5GbE WAN; verify the gateway handoff can deliver it.
5 Gbps fiber: both WAN and at least one LAN path must clear 5 Gbps, plus matching switch and adapters.
Checkout checklist
- Confirm the AT&T gateway model and its fastest Ethernet handoff before choosing WAN speed.
- Enable IP passthrough on the gateway; disable its Wi-Fi to avoid competing networks.
- Count LAN-side multi-gig needs separately — one fast WAN port is not a fast network.
- Only pay for 6 GHz tri-band when compatible clients exist in the home.